DJI Agras T50 OEM Spray Tank Liquid Level Meter and Nut (BC.AG.SS000471)

OEM Spray Tank Liquid Level Meter & Nut | Original DJI Agras T50 & T40 Tank Level Sensor | Real-Time Fill Monitoring Component | Spray System Repair Hardware | Field-Ready Original Replacement Part | SKU: AG-LIQLEV-T50-000871 | DJI Material Number BC.AG.SS000471

DJI Material Number BC.AG.SS000471 — this is the official DJI part number for this exact component. Match it to your parts diagram or the label on the original part to confirm fitment; factory labels may carry a revision suffix, which is the same part.

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🇺🇸 U.S.A. FIRST

Ares Acres LLC is a U.S.-based authorized DJI Agras reseller supporting American agricultural drone operators with genuine DJI Agras OEM replacement parts, accessories, and field-ready inventory.

FREE & FAST Shipping is included for all U.S. customers.

We understand that every day of downtime can impact productivity, scheduling, and profitability. That's why we focus on providing fast fulfillment, responsive customer support, and reliable access to the parts operators need most.

We use specialized technicians to verify and dispatch the Spray Tank Liquid Level Meter and Nut ordered.

Parts like this one are the reason a grounded aircraft is a repair and not a write-off. A single component held in U.S. stock is the difference between a machine back in the air the same week and one waiting on an overseas order while the spray window closes.

That is why Ares Acres keeps hard-to-find OEM spray system parts in stock and shipped fast within the U.S.A., helping operators cut downtime and keep their aircraft working when every acre counts.

For professional farmers, aerial applicators, and commercial drone operators running the DJI Agras T50 / DJI Agras T40, this is the part that keeps a scheduled job on the calendar instead of on hold.

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✅ DJI Agras T50 / T40 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking

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📦 Package Includes

• 1 × DJI Original Spray Tank Liquid Level Meter (compatible with DJI Agras T50 & T40)
• 1 × DJI Original Spray Tank Liquid Level Meter Nut
• Protective packaging for safe transport
• Basic installation reference

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🔧 Component Overview

The DJI Agras T50 - T40 Original Spray Tank Liquid Level Meter is a genuine OEM replacement sensor designed to provide precise real-time measurement of liquid levels inside the drone's spray tank.

This component ensures that operators can monitor chemical or fertilizer volume accurately, preventing mid-flight shortages and optimizing spray efficiency.

Precision-engineered by DJI, the meter integrates seamlessly with the Agras T50/T40 tank system and onboard flight controller, delivering factory-spec accuracy and dependable performance under demanding agricultural conditions.

Replacing only the liquid level meter instead of the entire spray tank offers a cost-effective repair solution, reducing downtime and getting your aircraft back into the field quickly. This listing includes the matching mounting nut, so the repair can be completed with fresh hardware in a single order.

Key features include:

• Genuine DJI OEM part – factory-certified for Agras T50 & T40 drones
• Accurate liquid sensing – provides real-time spray volume data for efficient operations
• Durable build – resistant to corrosion, agricultural chemicals, and vibration
• Precision fit – designed for seamless integration with DJI spray tank assemblies
• Cost-effective repair – replace the sensor only, not the entire tank system

The spray tank environment is one of the harshest on the aircraft. During commercial use, the level meter may be exposed to:

• Continuous chemical immersion
• Herbicide, fungicide, and insecticide formulations
• Liquid fertilizer exposure
• Constant liquid sloshing during flight
• Continuous flight vibration
• Repeated fill and drain cycles
• Pressure-washing during tank cleaning
• Temperature changes
• Sediment and abrasive particles
• High-hour daily deployment

Over time, these conditions may affect the sensor's accuracy, wiring, seals, and mounting hardware—producing erratic readings, false empty warnings, or complete signal loss.

Prove the meter is wrong before you replace it, because a measured fill test settles the question in half an hour and costs nothing. Drain and flush the tank, then add clean water in known increments from a container you have actually measured, pausing at each step to record what the aircraft reports. A meter that tracks correctly through part of the range and diverges elsewhere has drifted. One that never changes has lost signal entirely. One that jumps around while the water sits still is an electrical fault, not a sensing fault.

Separate the meter from its wiring before you order anything, because the cable is a separate part and this listing does not include it. With the tank at a steady level and the reading on screen, flex the harness gently along its length and work the connector body from side to side. A reading that jumps in response to that is telling you the fault is in the cable or the connection, and a new meter will change nothing. Do the same check with the connector unplugged and inspected.

Look at the connector itself in good light before condemning the sensor. Green or white powder on the pins, a dull film on the mating faces, a pin that has backed part way out of its housing, or a seal that has hardened and no longer grips are all faults that produce exactly the symptoms of a dead sensor. Chemical-laden moisture conducts once it finds a connector, which is why intermittent readings so often trace back to a joint rather than to the part everybody suspects first.

Clean the sensor before you judge it. A film of dried product, a crust of fertilizer, or a layer of sediment sitting on the sensing area will produce wrong readings from a perfectly serviceable meter, and tanks that are rinsed but never scrubbed build that layer slowly enough that nobody notices. Drain, wash the tank interior properly, clean the sensor with water and a soft cloth, refit, and repeat the fill test. A meaningful number of meters replaced under warranty were simply dirty.

Note whether the fault is static or only shows up flying. A reading that is correct with the aircraft parked and wrong in the air points at vibration working a marginal joint, or at the aircraft honestly reporting liquid that is sloshing. A reading that is wrong even sitting still on level ground with a known volume aboard is the meter or its calibration, and that is the case where a replacement is the right call.

Cross-check the meter against your own paperwork over a few loads. Compare what the tank says it used against acres covered at the rate you set, and against how much chemical actually left the shuttle. Operators tend to trust the screen over the drum, and a meter that has drifted a little is invisible for weeks in exactly that way. A consistent gap in one direction is drift; a gap that changes sign load to load is more likely a connection.

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⚙️ Functional Purpose

The original Spray Tank Liquid Level Meter is designed to monitor and report the liquid volume inside the DJI Agras T50 and T40 spray tanks.

The component helps:

• Provide real-time tank volume readings
• Support accurate application planning
• Prevent unexpected mid-flight chemical shortages
• Support automated tank-empty alerts
• Optimize refill timing and logistics
• Support consistent spray coverage
• Reduce wasted chemical and wasted flights
• Maintain factory-intended tank monitoring
• Restore degraded or failed sensing hardware
• Support professional spray-system repair work
• Reduce preventable aircraft downtime
• Maintain commercial field readiness

Accurate volume data drives efficient spraying. Operators plan flight lines, refill stops, and chemical loads around what the tank reports—and when that report is wrong, every downstream decision is wrong with it.

A failing level meter may contribute to:

• Inaccurate or erratic volume readings
• False tank-empty warnings
• Unexpected mid-pass shortages
• Incomplete or overlapping coverage
• Wasted chemical
• Extra refill trips
• Interrupted spray missions
• Unexpected field interruptions

Empty and triple-rinse the tank before a tool touches the mounting point, and capture the rinsate rather than putting it on the ground where the aircraft parks. The residue at the bottom of a spray tank is the most concentrated material anywhere on the machine, and you are about to open a fitting that sits in it. Gloves, eye protection, and a well-ventilated space, then disconnect the flight batteries before the sensor connector is unplugged.

Photograph the installation from inside and outside the tank before anything moves. Record which way the sensor body is clocked, where the cable exits and how it is routed and clipped, and whether the seal sits inboard or outboard of the tank wall. Seals fitted to the wrong side of a bulkhead boss leak under a full tank and look perfectly correct from outside, and the original installation is the only reference you will have once the old part is out.

Release the connector by its body, never by the wire. The cable is a separate part on this platform, so a conductor pulled out of a crimp or an insulation cut turns a one-part repair into two parts and a second wait. Support the harness while you work, and if the connector has a latch, find and release it rather than tugging harder. Cap or bag the connector so tank rinse water and grit cannot get into it while the job is open.

The mounting nut is where this job goes wrong. Over-tightening is named on this listing as a cause of failure for a reason: the load goes into a polymer boss in a polymer tank, and past a certain point the threads yield, the boss crazes, and the joint seals worse rather than better. Bring the nut up by hand until the seal is compressed and it feels solid, and stop. Do not reach for channel locks, and do not grip the sensor body to counter-hold.

Start the nut backward until you feel the thread drop into place, then forward. These are coarse polymer threads in a part you cannot easily replace, and a cross-thread here means a tank fitting rather than a nut. Make sure the sealing face on the tank is clean and dry first, because a fleck of dried product under a seal is a slow weep that will not show up until the tank is full and the aircraft is loaded.

Do not add PTFE tape, thread sealant, or grease unless the DJI documentation for this fitting calls for it. A joint that seals on a compressed face does not need sealant, and sealant in the threads holds the nut off its intended position, which is the opposite of what you want. Many common thread compounds also attack polymers over a season of chemical exposure.

Test with clean water in stages before chemical goes anywhere near it. Fill and let the tank stand full for several minutes while you watch the mounting point from below for a bead or a damp ring, because static head finds a marginal seal that a splash test will not. Then run the measured fill test again from empty and confirm the reading tracks at both ends of the range, since errors show at the extremes first. Then power up and confirm the aircraft reports tank volume normally before you call it done.

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⚠️ Common Replacement Indicators

Replacement may be recommended when operators observe:

• Erratic or jumping tank level readings
• Level readings stuck at one value
• False empty or false full indications
• Tank level not updating during spraying
• Level warnings that do not match actual volume
• Visible sensor damage
• Cracked or degraded sensor housing
• Chemical-related corrosion
• Damaged wiring or connector
• Worn or damaged mounting nut
• Leaking around the sensor mounting point
• Damage discovered during tank cleaning
• Damage discovered during inspection
• Spray system refurbishment
• Long-term commercial wear

Common failure causes include prolonged chemical contact, corrosion at electrical contacts, vibration fatigue, sediment buildup, seal degradation from repeated fill/drain cycles, and over-tightening of the mounting nut during previous service.

Because this sensor lives in constant chemical contact, it is a natural wear item on high-hour aircraft. Operators running heavy seasonal schedules often keep a spare on the shelf.

Readings that are correct through most of the tank and wrong at the bottom, or wrong at the top, are drift rather than failure. Sensing hardware that has been fouled or degraded usually loses accuracy at one end of its range first, and the end it loses is where sediment settles or where residue dries when the tank is left standing. If a proper tank cleaning does not restore the missing end of the range, the meter has aged out.

A reading that jumps unpredictably while the liquid is still is electrical, full stop. Liquid in a tank cannot change level that fast, so what is changing is a signal. Look at the connector first, then the cable, then the meter, in that order, and do the harness flex test before you buy anything.

A reading frozen at one number that never moves through an entire fill and drain cycle is a complete loss of signal rather than a degraded one. That is consistent with an open circuit anywhere between the sensor and the flight system, which again means the cable and connector get inspected before the meter is condemned.

A tank that reports full when it is visibly empty is often residue rather than electronics. Dried product bridging the sensing area, or a crust that has built up over a season of rinsing without scrubbing, will hold a reading high. Wash the tank interior properly and clean the sensor before you accept that reading as a fault.

Weeping or a damp ring at the mounting boss after a refill is the seal, the nut, or the boss itself. Look at the boss closely for stress whitening or fine radial cracks running out of the threads, because that is the signature of a nut that was over-tightened at some point in the past, and it means the tank needs attention rather than just a new seal.

Readings that went strange right after a tank cleaning usually mean water was driven somewhere it should not have gone. A pressure lance aimed at the mounting point or at the connector puts water past seals designed for splash and immersion from the inside, not for a jet from the outside. Dry it out fully, inspect the connector, and see whether the fault clears before ordering a part.

Faults that appear only on hot afternoons or only on cold mornings are marginal connections revealing themselves through thermal expansion. A joint that is barely making contact at one temperature makes contact at another, which is why these faults feel random and why they resist diagnosis. Chase the connector and the terminations before the sensor.

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📐 Specifications

DJI Material Number (SKU): BC.AG.SS000471

Component Type: Spray Tank Liquid Level Sensor

SKU: AG-LIQLEV-T50-000871

Material: Chemical-resistant polymer and electronic sensor assembly

Compatibility:

• DJI Agras T50
• DJI Agras T40

Function: Monitors and reports liquid levels within the spray tank

Package Contents: 1 × liquid level meter + 1 × mounting nut, individually sealed

Fitment: Direct-fit original replacement component

Product Classification: Original Replacement Parts

Installation should be completed by an operator or technician familiar with the T50/T40 spray tank system.

Before installation, inspect:

• The spray tank interior and mounting point
• Sensor wiring and connector
• Sealing surfaces around the mounting location
• Surrounding spray system components

After installation, confirm:

• The meter is securely mounted with the included nut (snug, not over-tightened)
• No leaks are present around the mounting point
• Level readings respond correctly during a fill test
• Wiring is properly routed and connected
• The flight controller reports tank volume normally

Sensing Principle and Output: Not published on this listing. Do not assume a float, a pressure element, or a capacitive design when planning a repair, and do not attempt to test the sensor against a substitute or a bench supply on that assumption. Diagnose it by behavior on the aircraft and by measured fill test.

Measurement Accuracy and Resolution: No accuracy figure is published here. Judge the part against a measured fill test on your own aircraft rather than against a number, and compare the readings the aircraft gives you now with what the same test gave when the machine was known good.

Nut Torque Specification: Not published. This listing states only that the meter should be securely mounted with the included nut, snug and not over-tightened. Bring it up by hand, stop when the seal is compressed and the joint feels solid, and do not use a wrench to get more.

Thread Size and Seal Dimensions: Not published in this listing. Do not substitute generic plumbing hardware or an O-ring from a kit. The nut supplied with this part is the matching DJI item, which is the reason it ships with the meter.

Service Life in Hours or Seasons: No figure is published, and any number given without a source is a guess. Judge it on evidence: a measured fill test that no longer tracks, a range that has lost one end after a proper cleaning, a cracked or degraded housing, or corrosion at the contacts.

Cable and Harness: Not included. This listing covers the meter and its nut only. The liquid level meter module cable is stocked separately, so diagnose which side of the connector your fault is on before ordering.

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🧰 Fitment Verification Before You Order

This listing is DJI material number BC.AG.SS000471. That number, not the description, is what makes a part match. Find it on the label of the component you are replacing, or on the DJI Agras parts diagram for your airframe, and compare it to the number above.

Revision suffixes are still the same part. DJI labels sometimes carry a trailing revision such as .01, .02, or .F. Those denote a production revision, not a different component. Match the base number and disregard the suffix.

Visually similar is not the same. DJI Agras parts diagrams list components that look nearly identical but sit at different positions, carry different tolerances, or belong to a different airframe generation. Ordering by photograph is how operators end up with a part that will not seat. Order by number.

Verified fitment for this listing: DJI Agras T50 / DJI Agras T40. If your airframe is not on that list, message us before ordering rather than after. We would rather answer a question than process a return, and so would you.

Not sure? Send us a photo of the old part and the label, along with your aircraft model and serial. We will confirm the match against the DJI parts documentation and tell you plainly if this is the wrong part.

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🛠️ Installation & Handling Notes

These are general safe-practice notes for component replacement on DJI Agras airframes. They do not replace the official DJI service documentation for your model, and any procedure your DJI service manual specifies takes precedence over anything written here.

Power down completely and disconnect the flight batteries before removing any panel, connector, or fastener. Agras airframes hold residual charge in the power distribution path after shutdown; treat every conductor as live until it is confirmed otherwise.

Photograph the assembly before you disturb it. Cable routing, connector orientation, and fastener lengths on Agras airframes are not interchangeable, and the Spray Tank Liquid Level Meter and Nut is easier to fit correctly when you can see how the original sat.

Torque to DJI specification. Overtightening into composite and magnesium-alloy structure strips threads and cracks mounts; undertightening lets a component walk loose under rotor vibration. Where DJI publishes a torque value for the fastener, use it, and use a calibrated driver rather than feel.

Check the mating surfaces and seals while you are in there. A component is only as good as what it seats against. Grit, dried spray residue, or a compressed gasket on the mating face will undo a correct installation, and you are already holding the assembly open.

Test before you spray. Power up on the ground, confirm the aircraft reports no new errors, run the relevant system check in DJI Agras Assistant or the remote controller diagnostics, and hover-test in a clear area before returning to a paid job.

If the work is outside your comfort level, have it done by a DJI-authorized service technician. The part cost is small next to the airframe.

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🚜 Necessary For

This liquid level meter is ideal for:

• DJI Agras T50 operators
• DJI Agras T40 operators
• Farmers and agricultural drone operators maintaining T50/T40 fleets
• Drone repair shops and service centers
• Commercial spraying operators requiring precise volume control
• OEM resellers stocking high-demand DJI Agras components
• Spray system repairs and refurbishment
• Fleet maintenance managers
• Preventative maintenance programs
• Emergency repair inventory
• High-hour agricultural drone operations

This component is especially important during:

• Spring application season
• Fungicide, herbicide, and insecticide programs
• Liquid fertilizer operations
• Orchard and vineyard applications
• Large-acreage contracts
• Multi-drone fleet operations
• Time-sensitive weather windows
• Peak agricultural operating periods

The single most useful distinction on this aircraft is between the tank level meter and the flow meter, because operators describe both faults with the same sentence. The level meter reports how much liquid is in the tank. The flow meter measures what is actually going through the spray line and drives applied-rate accounting. If your rate is wrong but the tank volume tracks a measured fill correctly, look at the flow side. If tank volume is wrong but the rate holds, this is the part.

This listing covers the meter and the nut. The liquid level meter module cable is a separate product, and the two get ordered for each other constantly because a broken cable and a dead sensor read identically on screen. Decide which side of the connector your fault is on using the harness flex test before you order, and if the diagnosis is genuinely ambiguous, ask us rather than buying both.

The nut in this package is not a generic fitting and should not be treated as one. It is the matching DJI item for this meter, sized to compress a specific seal against a specific boss, and that is exactly why it ships together with the sensor. A hardware store nut with the same thread will feel like it works and will load the joint differently, which is how tanks develop weeps at a boss that was fine before somebody improvised.

Confirm the airframe before ordering. Tank sensing hardware looks broadly similar across the Agras range and does not interchange between generations. This listing is supplied under DJI material number BC.AG.SS000471 for the DJI Agras T50 and T40. Match the number on the part you removed, or the callout on your own parts diagram, and treat a trailing revision suffix on a factory label as the same part rather than a different one.

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💡 Why This Part Matters

The DJI Agras T50 and T40 are designed for high-capacity spraying missions where accurate chemical distribution is critical.

Using an authentic DJI replacement ensures reliable tank level monitoring, prevents unexpected interruptions, and maintains optimal coverage.

Unlike aftermarket sensors, this OEM meter is built to DJI specifications, guaranteeing compatibility, durability, and long-term performance even in harsh agricultural environments.

Without a properly functioning liquid level meter, operators may risk:

• Inaccurate volume data on every flight
• Mid-pass chemical shortages
• Uneven or incomplete coverage
• Wasted chemical and wasted flight time
• Extra refill trips
• Interrupted missions
• Unexpected aircraft downtime
• Delayed field applications
• Missed weather windows
• Reduced operational confidence

For practical operators, the value is straightforward:

Measure the tank. Trust the reading. Finish the pass. Keep the aircraft working.

Professional DJI Agras operators understand that precise application starts with precise information—and tank volume is information the aircraft reads hundreds of times per flight.

The DJI Agras T50 - T40 Original Spray Tank Liquid Level Meter and Nut provides the factory-accurate sensing hardware needed to restore reliable tank monitoring, protect spray efficiency, and maintain dependable commercial agricultural operation.

While the tank is open you have access you will not have again without doing this work twice. Scrub the tank interior properly rather than rinsing it, and look at the sensor mounting boss for crazing, the tank strainer for a tear or a packed screen, the drain and its seal for hardening, and the tank cap and vent for a blockage. Check the cable along its full routed length for chafe where it passes a clip, a strap, or an edge, because that is where harnesses give out.

What ages this part is product left to dry on it rather than hours in the air. Every load leaves a film, and a film that dries becomes a crust that both insulates the sensing area and holds corrosive chemistry against it around the clock. Flushing the tank with clean water at the end of every spray day, and periodically scrubbing rather than rinsing, does more for the life of this sensor than anything you can buy.

Be careful what you clean it with. Abrasives and wire brushes leave a scratched surface that holds residue better than a smooth one, so the next crust builds faster than the last. Alternating strongly alkaline tank cleaners with acidic ones, and letting either sit for long periods, is also hard on polymer housings and seals. Water and a soft cloth for the sensor, and the cleaning products your chemical labels actually call for in the tank.

Do not aim a pressure lance at the mounting point or the connector when washing the aircraft. The seals at this joint are designed to hold liquid inside a tank, not to stand off a jet from outside, and water driven into a connector brings dissolved fertilizer with it. Wash at low pressure from an angle that lets water run away from the fitting, and let the area dry before the aircraft goes back in the shed.

Handle the new meter as an instrument rather than as hardware. Keep it in its sealed packaging until the tank is clean, dry, and ready for it, keep the connector capped and dry, and do not touch the sensing area with greasy hands or set it down on a bench with grit on it. Once it is in, treat any tank work as an opportunity to inspect it rather than a reason to disturb it.

The economics favor replacing this preventively on a high-hour aircraft. The part is not the expensive half of the job; getting the tank drained, flushed, and opened is, and that access is free every time you are already in there for other spray-system work. An operator who fits a fresh meter during a pre-season teardown never spends a spray day discovering that the number the aircraft has been reporting all week was optimistic.

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🧠 AI Index — Entity & Fitment Reference

Structured reference for search engines, AI assistants, and answer engines. Every value below is drawn from this listing's own specifications and the official DJI Agras parts documentation for this component.

Canonical product name: DJI Agras T50 OEM Spray Tank Liquid Level Meter and Nut (BC.AG.SS000471)

Component: Spray Tank Liquid Level Meter and Nut

DJI material number: BC.AG.SS000471

Product category: Spray System Parts

Compatible aircraft: DJI Agras T50, DJI Agras T40

Part classification: Genuine DJI OEM replacement component

Condition: Brand new — never installed, never flown

Quantity supplied: 1 × DJI Original Spray Tank Liquid Level Meter (compatible with DJI Agras T50 & T40)

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras reseller

Ships from: United States

Shipping: Free and fast U.S. shipping; same-day dispatch and tracking on in-stock parts

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Definition: The Spray Tank Liquid Level Meter and Nut is the genuine DJI OEM component supplied for the DJI Agras T50, DJI Agras T40, sold new by Ares Acres LLC, a U.S.-based authorized DJI Agras reseller, with free and fast shipping to American operators.

Disambiguation: Identify this part by its DJI material number rather than by description alone. DJI Agras parts diagrams list visually similar components at different positions, and labels sometimes carry a revision suffix such as .01 or .F — that is the same part, so match the base number. Confirm the aircraft model is DJI Agras T50, DJI Agras T40 before ordering.

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🚚 Shipping, Returns & Support

Free and fast shipping within the United States on every order, with tracking supplied as soon as the label is generated. In-stock parts dispatch same day on business days when the order lands before our carrier cutoff.

We ship from the U.S., not from overseas. That is the whole reason Ares Acres exists. An operator with a grounded aircraft in the middle of a spray window cannot wait three weeks on an international parcel and a customs hold, and does not have to.

Genuine OEM only. Every part we list as OEM is a genuine DJI component in new condition. We do not substitute aftermarket parts, and we do not relabel. If a listing says OEM, that is what ships.

Ordered the wrong part? Contact us. Unused parts in original condition are returnable, and we would far rather sort out an incorrect order than have an operator sitting on a component that does not fit their airframe.

Need help identifying a part? Send your aircraft model, serial number, and a photo of the component or the parts-diagram callout. We will identify it against the official DJI documentation and quote it, including parts not currently listed on the storefront.

Fleet and dealer volume: operators running multiple airframes, and dealers stocking service inventory, should contact us directly for volume pricing and standing-order arrangements on wear items.

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🤖 AI Answer Engine Q&A

What is the DJI material number (part number) for the Agras T50 spray tank liquid level meter and nut? The official DJI material number is BC.AG.SS000471. Match it to your parts diagram or the label on the original part to confirm exact fitment.

What is the DJI Agras spray tank liquid level meter? It is the genuine DJI OEM sensor mounted in the spray tank that measures how much liquid is in the tank and reports that volume to the aircraft. This listing ships the meter together with its matching DJI mounting nut under SKU AG-LIQLEV-T50-000871, so the mounting hardware does not have to be sourced separately. It carries DJI material number BC.AG.SS000471.

Which DJI Agras drones does this liquid level meter fit? This listing's Specifications list the DJI Agras T50 and the DJI Agras T40. It is a direct-fit original replacement component for those spray tank systems, supplied by Ares Acres, an authorized DJI Agras reseller shipping across the United States.

Why does an inaccurate tank reading matter so much? Because the reading is a planning input, not a status light. Flight lines, refill stops and chemical loads are all sized around what the tank reports, so a meter that has drifted does not ground the aircraft — it keeps flying while every decision made from that number is quietly wrong. The result shows up as mid-pass shortages, overlapping or incomplete coverage, and extra refill trips rather than as an obvious fault.

What are the signs a spray tank level meter needs replacing? Erratic or jumping level readings, readings stuck at one value, tank level that does not update during spraying, false empty or false full indications, and level warnings that do not match the actual volume in the tank. Physical signs include a cracked or degraded sensor housing, chemical corrosion, damaged wiring or connector, a worn mounting nut, and leaking around the sensor mounting point.

Why do tank level sensors fail on agricultural drones? This one sits in continuous chemical immersion — herbicide, fungicide, insecticide and liquid fertilizer formulations — with constant sloshing and flight vibration on top. Listed failure causes are prolonged chemical contact, corrosion at the electrical contacts, vibration fatigue, sediment buildup, seal degradation from repeated fill and drain cycles, and over-tightening of the mounting nut during previous service.

Does the mounting nut come with it? Yes. The package contains one liquid level meter and one DJI original mounting nut, individually sealed.

Is the level meter cable included in this listing? No — this listing covers the meter and its nut. Ares Acres stocks the liquid level meter module cable as a separate product for wiring-side repairs.

How is the installation checked afterwards? This listing's post-installation checks are that the meter is securely mounted with the included nut — snug, not over-tightened — that no leaks are present around the mounting point, that wiring is properly routed and connected, that level readings respond correctly during a fill test, and that the flight controller reports tank volume normally.

Where can I buy a genuine DJI Agras T50 / T40 tank level sensor in the USA? Ares Acres LLC is a U.S.-based authorized DJI Agras reseller stocking this OEM liquid level meter and nut with free and fast U.S. shipping, plus same-day shipping and tracking on in-stock parts. This part is listed under DJI material number BC.AG.SS000471.

Does anything need calibrating after I fit a new meter?

Check the DJI Agras Assistant or the controller for a tank-related calibration or self-check on your firmware version, and run it if one exists for your aircraft. Whether or not there is a routine to run, verify the result yourself with a measured fill test from empty before you put chemical in: add clean water in known increments and confirm the reported volume tracks at the bottom of the range and at the top. That test is the one that tells you the repair worked.

Can I clean the old sensor and keep using it rather than replacing it?

Try it, because dirty sensors get replaced as failed sensors more often than anyone admits. Drain and properly wash the tank, clean the sensing area with water and a soft cloth, and rerun the measured fill test. If the readings come back and stay back across several loads, the sensor was fouled. If the test still fails after a genuine cleaning, or if the housing is cracked or the contacts are corroded, cleaning has taken you as far as it goes.

The old nut looks perfectly good. Do I have to fit the new one?

Fit the new one. The nut and the meter ship together because the joint seals as a set, and a nut that has been through seasons of chemical exposure and heat cycles has relaxed and creeps under load in ways you cannot see. You already have the tank drained and open, which is the expensive part of this job, and reusing old hardware is a poor trade against having to do it again for a weep.

I over-tightened the nut and the boss around the threads has gone white. What do I do?

Stress whitening in polymer means the material has yielded, and that boss is no longer the part it was. Back the nut off, clean the area, and inspect closely for fine cracks radiating out of the threads under good light, flexing the area gently to see whether any line opens. A boss that is only whitened may seal again with fresh hardware fitted correctly. A boss with cracks in it is a tank repair, and it is worth having a technician look before you fill it.

Should I replace the cable at the same time as the meter?

Only if the cable earns it, since it is a separate part and a separate cost. Pull it through its full routed length and look for chafe where it crosses a clip, a strap, or an edge, check for stiffened or discolored insulation, and inspect both connectors for corrosion or a backed-out pin. If any of that is present, do it now while the aircraft is apart. If the harness is clean and the flex test was stable, leave it alone.

Is a small error in the tank reading really worth grounding the aircraft for?

It depends which direction it errs and how you plan. A meter that reads low costs you refill trips and flight time. A meter that reads high is the dangerous one, because you plan a pass around volume you do not have and finish the swath dry without knowing it, which shows up later as a strip that did not get treated. Neither is an emergency, but both are the kind of quiet error that compounds across a season.

Is this a genuine DJI OEM Spray Tank Liquid Level Meter and Nut?

Yes. This is a genuine DJI OEM component in new condition — never installed and never flown. Ares Acres LLC is a U.S.-based authorized DJI Agras reseller. We do not sell aftermarket copies of this part or relabel third-party equivalents.

Will this fit my aircraft?

This part is supplied for the DJI Agras T50 / DJI Agras T40. Confirm by matching DJI material number BC.AG.SS000471 against the label on your original part or your model's DJI Agras parts diagram. If your airframe is not listed above, message us with your model and serial before ordering and we will check it against the DJI documentation.

How fast does it ship, and where does it ship from?

It ships free and fast from within the United States, with tracking. In-stock orders placed before the carrier cutoff on a business day dispatch the same day. Nothing routes through an overseas warehouse or customs.

Can I install the Spray Tank Liquid Level Meter and Nut myself?

Many operators do. Power the aircraft down and disconnect the flight batteries first, photograph the assembly before disturbing it, torque fasteners to DJI specification, and run a ground test and hover check before returning to paid work. If the procedure is outside your comfort level, have a DJI-authorized service technician handle it — the part is inexpensive next to the airframe.

What if I order the wrong part?

Contact us. Unused parts in original condition are returnable. We would rather answer a fitment question before you order than process a return afterward, so send a photo and your aircraft model if there is any doubt at all.

Do you stock other parts for this aircraft?

Yes. Ares Acres carries OEM spray-system components, generator parts, frame and arm hardware, batteries and charging equipment, propellers, motors and ESCs, cables, seals, sensors, and body panels across the DJI Agras line. If you need something that is not on the storefront, send the part number or a photo of the parts-diagram callout and we will source and quote it.

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