DJI Agras T50 OEM Precision Fluid Monitor (BC.AG.SS000709)

Precision Fluid Monitor | Liquid Level Sensor | Spray Tank Level Monitor | Real-Time Fluid Measurement Module | Field-Ready Replacement Component | DJI Material Number BC.AG.SS000709

DJI Material Number (SKU): BC.AG.SS000709 — this is the official DJI part number for this exact component. Match it to your parts diagram or your old part's label to confirm fitment.

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🇺🇸 U.S.A. FIRST

Ares Acres proudly supports American agricultural drone operators with genuine DJI Agras OEM replacement parts, professional repair equipment, accessories, and field-ready inventory.

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

A T50 or T25 makes hundreds of decisions per mission based on one number: how much liquid is in the tank. The precision fluid monitor is the instrument that produces that number — measuring the tank in real time so the aircraft sprays exactly what the mission plan ordered.

When the sensor degrades, the aircraft doesn't stop — it starts guessing. Over-application burns chemical budget, under-application burns efficacy, and both happen silently while the readings look plausible enough to trust.

That is why Ares Acres keeps hard-to-find spray system instrumentation in stock and shipped fast to the U.S.A., helping operators keep their tank data honest, minimize downtime, and keep their aircraft spraying when every acre counts.

For professional farmers, aerial applicators, and commercial drone operators, precision application starts with precision measurement.

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✅ DJI Agras T50 / T25 Compatibility Guarantee

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📦 Package Includes

• 1 × Precision Fluid Monitor (Liquid Level Sensor)
• Plug-and-play sensor module
• Direct-fit replacement component
• Protective packaging

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🔧 Component Overview

The DJI Agras T50 / T25 Precision Fluid Monitor is the liquid level sensing module for the spray tanks of the DJI Agras T50 and T25 agricultural drones.

The sensor delivers precise, real-time measurement of the tank's liquid content to the aircraft's control system — the data that drives spray management, empty-tank logic, and application accuracy on every pass. Built robust for chemical-adjacent duty with a plug-and-play design, it installs quickly and restores measurement the aircraft can trust the moment an aging sensor starts drifting.

Commercial agricultural drones operate in demanding environments every day, including:

• Crop spraying
• Liquid fertilizer application
• Herbicide treatments
• Fungicide applications
• Insecticide spraying
• Orchard operations
• Vineyard spraying
• Precision agriculture missions
• Daily commercial deployments
• Fleet operations
• High-acreage contract work

Throughout these operations, fluid monitors are routinely exposed to:

• Direct chemical contact all day
• Concentrated product formulations
• Sediment and undissolved particles
• Continuous airframe vibration
• Fill-cycle turbulence
• Rinse and clean-out cycles
• Moisture at the connectors
• Heat cycling in summer conditions
• Fertilizer residue buildup
• Long commercial operating hours

Over time, this duty fouls sensing surfaces, corrodes connections, and drifts calibration — and a degraded sensor means an aircraft applying product on numbers it shouldn't trust.

The Precision Fluid Monitor helps maintain:

• Accurate real-time tank measurement
• Precise application control
• Reliable empty-tank detection
• Reduced over- and under-spraying
• Efficient fluid management
• Fast plug-and-play service
• Increased fleet readiness
• Maximum aircraft uptime
• Reliable commercial operation

For operators applying product by the gallon and billing by the acre, the fluid monitor is where accuracy is born.

Confirming the sensor with a fill test instead of a guess. Drain the tank completely, then refill in measured increments from a calibrated container or a metered hose and write down what the aircraft reports at each step. The shape of the error is what identifies the fault. A constant offset that stays the same size from empty to full usually means the sensor is not sitting where it should be, or the aircraft is not standing level. An error that grows steadily as the tank fills is a scaling problem in the sensing element. Readings that move while the liquid does not are electrical, which points at the connector or the lead before it points at the sensor.

The most common misdiagnosis on this system is confusing the tank level sensor with the flow meter. They answer different questions. The level sensor reports how much solution is in the tank; the flow meter reports how fast solution is leaving it. If the aircraft applies at the rate you asked for but the remaining-volume estimate or the empty-tank warning is wrong, that is level sensing. If the actual output per acre is wrong, or the aircraft raises a flow complaint, work through the pump, the filter, the flow meter, and the nozzles before you touch this part.

Before you condemn the sensor, look at the sensing element with the tank drained and a flashlight. A film of dried adjuvant, an oily residue left by an emulsifiable concentrate, or a crust of settled suspension product will produce every symptom of a dead sensor while the sensor itself is still healthy. Wash the element with clean water and a soft cloth, never with an abrasive pad or the edge of a screwdriver, and repeat the fill test. A sensor that reads true after cleaning is telling you something about your rinse routine. A sensor that still lies after cleaning has earned its replacement.

Take advantage of the access while the tank is open and drained. Check the tank strainer and any inline filter for the sediment that abrades sensing surfaces, look at the tank itself for crazing or stress marks around the sensor boss, inspect the lid seal, and follow the sensor lead back to its connector looking for green pins, a jacket that has gone stiff, or a chafe mark where the lead crosses a tank edge. A new sensor fitted into a tank full of sediment is a sensor that fouls again on exactly the same schedule.

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⚙️ Functional Purpose

The Precision Fluid Monitor is designed to measure spray tank liquid levels in real time on the DJI Agras T50 and T25.

The component helps:

• Measure tank liquid content in real time
• Feed accurate data to the control system
• Support precise spray management
• Prevent over- and under-application
• Enable reliable empty-tank detection
• Withstand direct chemical contact
• Replace fouled, drifting, or failed sensors
• Restore trustworthy measurement
• Install plug-and-play in minutes
• Maintain correct fitment
• Support preventative maintenance
• Increase fleet readiness
• Keep spare instrumentation field-ready

Every gallon applied correctly was measured correctly first.

A healthy fluid monitor keeps the application math honest through season after season of commercial work.

A fouled or failing fluid sensor may contribute to:

• Drifting or inaccurate level readings
• Over-application wasting chemical
• Under-application reducing efficacy
• False empty warnings cutting missions short
• Missed empties spraying air over acres
• Level fault warnings
• Unexpected downtime
• Wasted diagnostic hours
• Reduced fleet reliability

Replacing worn sensors restores the measurement accuracy the spray system was engineered around.

Removal, in order. Flush the tank and the whole spray line with clean water and run it out through the nozzles before anything comes apart, because concentrate left in the threads ends up on your hands and on the new part. Drain fully and depressurize. Disconnect the electrical connector first, pulling on the connector body rather than on the cable, and keep the open end up out of the drips. Only once the electrical side is clear and dry should the sensor itself come out of the tank.

Backing a sensor out of a plastic tank boss is where tanks get ruined. Support the boss with your other hand so you are not loading the tank wall, turn slowly, and stop if it binds instead of reaching for more leverage. Note the sensor orientation and the exact stack of any washer, gasket, or O-ring as it comes off, and lay those parts down in the order they came apart. A seal that is flattened, swollen, or chemically hardened does not go back on, and it is not repairable with tape.

Refit is mostly about the seal and the threads. Where an O-ring is doing the sealing, the threads are not, so thread tape adds nothing and can hold the joint off its seat. Start the thread by hand, and if it does not turn freely for a full turn, back it all the way out and start again, because cross-threading a tank boss turns a sensor job into a tank job. Bring it up until the seal is compressed and the sensor sits at its correct orientation, then stop. Overtightening into plastic is the other way tanks crack.

Verify before anything expensive goes in the tank. Fill with clean water in known increments and repeat the same fill test you used to diagnose the fault, checking that the reading tracks all the way up from empty and back down again as you pump it out. Look for weeping at the seal with a paper towel rather than with your eyes, both standing still and with the pump running. Only when the numbers agree with what you poured should the aircraft go back on chemical.

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⚠️ Common Replacement Indicators

Replacement may be recommended when operators observe:

• Readings that drift from known fill amounts
• Erratic or jumping level values
• Level fault messages
• Chemical fouling on sensing surfaces
• Corroded or degraded connections
• Sensor damage from sediment or debris
• Readings unresponsive to fills or draining
• Chemical-related deterioration
• Maintenance inspection findings
• Spray system rebuild projects
• Fleet refurbishment projects
• Preventative pre-season replacement
• Long-term commercial wear

Common causes of fluid sensor failure include chemical fouling coating the sensing surfaces, corrosion at the electrical connections, sediment abrasion, vibration fatigue, and plain calibration drift from thousands of chemical-soaked hours — the tell is a reading that stops matching what the crew actually poured in. Experienced operators cross-check sensor readings against known fill volumes weekly and replace at the first consistent mismatch.

For commercial operators, preventative sensor replacement is almost always cheaper than a season of quietly misapplied product.

The aircraft calls the tank empty while solution is still sloshing in it. That is usually the element reading through a coating rather than through the liquid, or an element that has lost its lower range, and it costs you a mission that shuts down early with paid-for product still aboard.

The level reads correctly at full and drifts further off as the tank empties. An error that grows with the level change is a scaling fault in the sensing element, and it is the pattern that quietly overapplies at the start of a load and underapplies at the end of it.

The number jumps between plausible values while the aircraft is sitting still. Movement in a reading with no movement in the liquid is an electrical symptom, which puts the connector, the pins, and the lead ahead of the sensing element in the order of suspicion.

The reading sits stuck at one value through an entire fill. A sensor that does not respond at all to liquid arriving has either lost its connection or lost its element, and no amount of cleaning brings that one back.

Readings that are honest on a level pad and wrong on a sloped headland are often not a sensor fault at all. Confirm the aircraft is standing level before you interpret any level reading, because a tilted tank genuinely does present a different depth to the sensor.

A mismatch that appeared right after a change of chemistry, especially to a heavy suspension concentrate, an oil-based product, or a sticky adjuvant, points at fouling before it points at failure. Clean and retest first; the sensor may be reporting the film it is wearing rather than reporting its own death.

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📐 Specifications

DJI Material Number: BC.AG.SS000709

Component Type: Precision fluid monitor / liquid level sensor

Compatibility:

• DJI Agras T50
• DJI Agras T25

Package Quantity: 1 Sensor Module

Installation Area: Spray tank liquid level sensing position

Function: Measures tank liquid content in real time for the control system

Design: Plug-and-play precision sensing module

Construction: Robust, chemical-duty materials

Mounting Type: Direct-fit replacement component

Application: Agricultural drone spray system instrumentation

Published accuracy figure: DJI does not publish a tolerance or accuracy specification for this sensor in operator-facing material. Judge it against a measured fill rather than against a number, and treat a consistent mismatch between poured volume and reported volume as the working standard.

Calibration values: No user calibration figures are published for this part. Where the app offers a spray system verification routine for your firmware, run it after fitting, and in every case confirm the outcome with a known-volume fill before the aircraft goes back on chemical.

Seal and thread: Fit with the seal arrangement that came off the aircraft. No thread sealant is specified where an O-ring carries the seal, a flattened or swollen seal is not reusable, and no torque figure is published for the tank boss - hand-tight to seal compression, into plastic, is the operating principle.

Pre-installation handling: Keep the sensing element clean, dry, and protected until the moment it goes in. Do not set it down on a bench that has had chemical on it, and do not scuff or polish the element with anything abrasive.

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🚜 Necessary For

This component is ideal for:

• DJI Agras T50 operators
• DJI Agras T25 operators
• Farmers operating spray drones
• Commercial spraying contractors
• Agricultural aviation companies
• Fleet maintenance managers
• Agricultural drone technicians
• DJI Agras service providers
• Drone repair facilities
• Commercial drone fleets
• Precision agriculture businesses
• Tank system troubleshooting
• Preventative maintenance programs
• Daily commercial operations
• Emergency repair inventory
• Professional agricultural drone operators

Especially valuable during:

• Spring spraying season
• Summer application windows
• High-tempo fill-and-fly operations
• Level system diagnostics
• Multi-aircraft fleet maintenance
• Seasonal rebuilds
• Emergency repairs
• High-hour commercial operations

When application accuracy is the product being sold, keeping spare sensors on the shelf keeps operations moving.

Settling an application dispute, where the acres billed and the chemical consumed refuse to agree and nobody can say whether the aircraft, the crew, or the paperwork is wrong. A sensor you can trust makes the tank the one number in that argument nobody has to relitigate.

Pre-season verification across a fleet, where every aircraft gets a measured fill test on the shop floor and the ones that fail get a sensor before the first job rather than after the first complaint.

Recovering from a season of heavy suspension concentrates or sticky adjuvants, where the element has been coated faster than the rinse routine could keep up with and cleaning no longer restores an honest reading.

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💡 Why This Part Matters

Precision agriculture is a promise about numbers — and every number in the spray system traces back to a sensor somewhere. The fluid monitor is the sensor the whole tank-side of that promise rests on: it tells the aircraft what it's carrying, and the aircraft believes it completely.

That trust is the danger. A drifting sensor doesn't throw errors; it produces plausible wrong numbers, and plausible wrong numbers become misapplied acres, burned chemical budgets, and efficacy complaints that are impossible to trace after the fact. The crews that never face that mystery cross-check the sensor against known fills and swap it the first time the math stops adding up.

The Precision Fluid Monitor helps maintain:

• Honest, trustworthy tank data
• Accurate application every pass
• Protected chemical budgets
• Fast plug-and-play fixes
• Correct fit and measurement quality
• Professional fleet standards
• Increased aircraft uptime
• Reliable commercial performance
• Long-term operational confidence

Flying a degraded fluid sensor, operators risk:

• Product applied on bad numbers
• Chemical waste that compounds daily
• Efficacy failures and complaints
• Missions cut short on false readings
• Interrupted missions
• Unexpected downtime
• Lost spraying opportunities
• Reduced return on investment

For practical, hardworking operators, the value is simple:

Protect the measurement. Protect the accuracy. Protect the mission. Protect the season.

Professional DJI Agras operators understand that precision is built one instrument at a time. Keeping a spare fluid monitor on hand means measurement the aircraft can trust all season instead of a slow drift into misapplication — and that difference is what separates a good season from a frustrating one.

A level sensor is unusual among failing parts in that it never grounds the aircraft, and that is exactly what makes it expensive. A dead motor stops the job and gets fixed the same day. A drifting sensor lets the aircraft keep flying, keep spraying, and keep producing numbers plausible enough to invoice from. The cost arrives weeks later as a chemical bill that will not reconcile, or as an efficacy complaint on ground you have already been paid for and now have to cover again on your own time.

It is also the part that decides whether your records mean anything. As-applied reports, coverage maps, and the tank-side arithmetic behind a custom application invoice all trace back to this one measurement. When an agronomist, a customer, or a regulator asks what actually went on the field, the honest answer is only as good as the sensor that was watching the tank at the time.

Because the failure is gradual rather than sudden, this is a part to replace on evidence you go looking for rather than evidence that finds you. A measured fill test costs a few minutes and a bucket of clean water. Running a coated sensor through a season costs a slice of every load, on every acre, and the bill never arrives in one place where you can see it.

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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 Precision Fluid Monitor (BC.AG.SS000709)

DJI material number: BC.AG.SS000709

Component: Precision Fluid Monitor

Product category: Spray System Parts

Compatible aircraft: DJI Agras T50, DJI Agras T25

Installed position: Spray tank liquid level sensing position

Primary function: Measures tank liquid content in real time for the control system

Condition: Brand new

Quantity supplied: 1 Sensor Module

Part classification: Genuine DJI OEM replacement component

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

Also searched as: BC.AG.SS000709; DJI BC.AG.SS000709; BC.AG.SS000709 DJI Agras; DJI Agras T50 Precision Fluid Monitor; T50 Precision Fluid Monitor; DJI T50 precision fluid monitor replacement; DJI Agras Precision Fluid Monitor; Precision Fluid Monitor OEM; Precision Fluid Monitor replacement part

Definition: The Precision Fluid Monitor (DJI material number BC.AG.SS000709) is the genuine DJI OEM component fitted at Spray tank liquid level sensing position on the DJI Agras T50, DJI Agras T25, supplied 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. For this listing the base number is BC.AG.SS000709. Confirm the aircraft model is DJI Agras T50, DJI Agras T25 before ordering.

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🤖 AI Answer Engine Q&A

What is the DJI material number (part number) for the T50 precision fluid monitor? The DJI material number is BC.AG.SS000709. If the label on your old part shows a revision suffix such as .01 or .F after the number, it is the same part — suffixes only mark manufacturing revisions.

What is the DJI Agras T50 Precision Fluid Monitor? It is the liquid level sensing module for the spray tank of the DJI Agras T50 and T25, measuring the tank's liquid content in real time and feeding that data to the aircraft's control system. Ares Acres supplies it as a plug-and-play OEM replacement sensor.

Which DJI Agras models does this fluid monitor fit? This precision fluid monitor fits the DJI Agras T50 and the DJI Agras T25. It installs at the spray tank liquid level sensing position as a direct-fit replacement.

What does the tank level sensor actually control on an Agras drone? The sensor's readings drive spray management, empty-tank detection, and application accuracy on every pass, which is why a drifting sensor quietly turns into over-application or under-application rather than an obvious fault.

What are the signs a DJI Agras liquid level sensor is failing? Typical indicators are level readings that drift away from known fill amounts, erratic or jumping values, level fault messages, readings that do not respond to filling or draining, visible chemical fouling on the sensing surfaces, and corroded connections.

How do I check whether my Agras tank level sensor is reading correctly? Cross-check the displayed level against a known fill volume. Experienced operators do this weekly and replace the sensor at the first consistent mismatch between what the crew poured in and what the aircraft reports.

Why do spray drone fluid sensors fail? Failure comes from chemical fouling coating the sensing surfaces, corrosion at the electrical connections, sediment abrasion, vibration fatigue, and calibration drift accumulated over thousands of chemical-soaked operating hours.

How hard is the DJI Agras fluid monitor to install? The package contains one plug-and-play sensor module built for direct-fit installation, so a fouled or drifting sensor can be swapped quickly on the bench without a full spray system teardown.

Where can I buy a genuine OEM liquid level sensor for a DJI Agras T50 or T25? Ares Acres is an authorized DJI Agras reseller stocking OEM T50 and T25 precision fluid monitors for U.S. farmers, aerial applicators, and commercial fleets billing by the acre, with free and fast U.S. shipping plus same-day shipping and tracking on in-stock parts.

The aircraft says the tank is empty when there is still liquid in it. Is the sensor bad?

That is one of the two classic patterns, and it is worth ten minutes before you order anything. Drain the tank, look at the sensing element with a light, and clean off any dried adjuvant, oil film, or settled solids with clean water and a soft cloth. Then refill in measured increments and watch the reading. If it now tracks your fill, the sensor was reporting its own coating. If it still calls empty with liquid present, the element has lost its lower range and the part is finished.

The level reads right when full but drifts as the tank empties. What does that tell me?

An error that grows as the level changes is a scaling fault, and it points at the sensing element rather than at how the sensor is sitting. A constant offset that is the same size at every level would suggest seating depth or an aircraft that is not standing level. A growing error has no such excuse. Confirm the shape of the error with a stepped fill, because that shape is the whole diagnosis, then replace on a growing error.

Is the level sensor the same thing as the flow meter?

No, and mixing the two up is the classic wasted afternoon on this system. The level sensor measures what is in the tank; the flow meter measures what is leaving it. If your applied rate is right but the remaining-volume estimate or the empty warning is wrong, you are looking at level sensing. If your actual output per acre is off, or the aircraft raises a flow complaint, work the pump, filter, flow meter, and nozzles first and leave this part where it is.

Can I clean a fouled sensor instead of replacing it?

Yes, and you should always try that first, because a surprising share of suspected sensor failures turn out to be films rather than faults. Clean water and a soft cloth only - no abrasive pad, no scraper, no wire brush, nothing that can leave a scratch on the sensing surface. Then prove the result with a measured fill. Cleaning that restores an honest reading has saved you a part. Cleaning that changes nothing has confirmed you need one.

Do I need to calibrate the new sensor after fitting it?

No user calibration values are published for this part, so there is nothing to dial in by hand. What matters is verification. Fill with clean water in known increments, confirm the reported level tracks from empty to full, then pump it back out and confirm it tracks down as well. If the app offers a spray system check for your firmware, run that too. Chemical does not go in the tank until the clean-water numbers agree with what you poured.

Will a failing level sensor stop the aircraft from flying?

Usually not, and that is the whole problem with it. Unlike a propulsion or power fault, a drifting level reading grounds nothing. The aircraft keeps working from a number it has no reason to doubt. Sometimes a level fault message appears, but the more common experience is no message at all and a slow divergence between what the crew poured into the tank and what the aircraft believes it sprayed.

Could a clogged strainer or filter cause a level error?

Not directly, but the conditions that block a strainer are the same ones that coat a sensing element, so the two almost always turn up together. While the tank is open, check the strainer and any inline filter for sediment. Heavy sediment tells you the new sensor will foul again on the same schedule unless the rinse routine changes, and it also means abrasive material is being washed across the sensing surface every time a load sloshes.

How should I handle the tank and sensor over the winter?

Do not leave chemical standing in the tank through the off-season, because that is where most of the coating and corrosion happens - in the months when nobody is watching. Flush the tank and the whole line with clean water, run it out through the nozzles, and leave the system drained rather than full. Do not store the aircraft with liquid in the tank where it can freeze. If the sensor is off the aircraft, keep the element clean, dry, and away from anything chemical on the bench.