DJI Agras T40 OEM Liquid Level Meter Module

DJI Agras T40 OEM Liquid Level Meter Module — The tank-level sensor: the component that tells the aircraft how much mix is left, and therefore when to break off a mission, where to resume it, and when to stop the pumps. An honest tank reading is what lets a crew fly a tank to empty with confidence instead of guessing at both ends. Liquid Level Meter Module | Agras T40 & T20P Tank Level Sensing | Direct-Fit Replacement | Genuine OEM Service Part.

🇺🇸 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.

Ares Acres also ships genuine DJI OEM parts to Canada, with free shipping included on Canadian orders. Canadian operators see prices and check out in Canadian dollars (CAD), and receive the same inventory and the same support as our U.S. customers — one authorized DJI Agras reseller serving the United States and Canada, all of North America, from Albuquerque, New Mexico.

✅ DJI Agras T40 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• Genuine DJI Agras liquid level meter module in factory specification
• Catalogued for the DJI Agras T40 and T20P
• Brand new condition — never fitted, never flown

📦 Package Includes

• 1 × DJI Agras liquid level meter module
• OEM protective packaging

The spray tank, pumps, plumbing, seals, cables, connectors, and mounting hardware are supplied separately in their own listings unless shown.

🔧 Component Overview

The DJI Agras T40 OEM Liquid Level Meter Module monitors how much liquid is in the spray tank and reports it to the aircraft. That one number does more work than it looks like it should.

Follow what the aircraft does with the reading. Tank level drives the decision to break off a mission and return for a refill, and it drives where coverage resumes when the aircraft comes back. It feeds the aircraft's picture of its own weight, which is tied up with flight time and power margin. It is what stands behind the low-tank and empty-tank warnings, and therefore what protects the pumps from running dry at the end of a load. And it is the figure the operator relies on when they decide whether there is enough mix left for one more pass.

A tank sensor that lies does not announce itself as a fault. It shows up as judgement calls going wrong.

What the liquid level meter module does:

• Measures the quantity of liquid remaining in the spray tank
• Reports tank level to the aircraft and to the operator's display
• Triggers low-level and empty-tank warnings
• Supports refill-and-resume behaviour so coverage picks up where it stopped
• Contributes to the aircraft's load and flight-time estimation
• Helps protect the pumps from running dry
• Supports accurate application records and tank-mix accounting
• Restores factory level-sensing behaviour as a direct-fit replacement

How tank-level sensing goes wrong in the field:

• Residue coating the sensing element. This is the big one. Suspension concentrates, wettable powders, and adjuvants leave films that build up over a season, and a coated sensor reads the coating rather than the liquid.
• Product left in the tank overnight. Mix that sits and dries or crystallises on a sensing surface is far harder to remove than the same mix rinsed out at the end of the day.
• Foaming. Surfactant-heavy mixes foam, and foam is not liquid. A sensor can report honestly and still disagree with the operator's expectation.
• Connector corrosion. A tank area is wet, chemical, and washed down daily, which is hard on any electrical interface.
• Cable chafe. The harness crosses from a tank that flexes and shifts with load to a frame that does not, and anything crossing that boundary works itself against an edge.
• Physical damage. A cracked housing from a hard landing, an over-tightened fitting, or a lever used in the wrong place.
• Attitude and siting. A level reading assumes a level aircraft; a sloped parking spot changes what the sensor sees.

What a sound module gives back:

• A tank reading a crew can act on without hedging
• Warnings that arrive when they should, not before or after
• Refill-and-resume that lands coverage where it left off
• Pumps that stop before they run dry
• Application records that match what actually went out
• Flights flown to the end of the tank rather than cut short on suspicion

⚙️ Functional Purpose

The level meter exists so the aircraft and the operator share the same picture of what is left in the tank.

The liquid level meter module:

• Senses liquid quantity in the spray tank
• Delivers level data to the aircraft's spray-system control
• Supplies the operator's tank-level indication
• Raises low-tank and empty-tank alerts
• Enables break-off and resume at the correct point in a mission
• Informs load, endurance, and power-margin estimates
• Supports dry-run protection for the pump system
• Is replaced as a unit once a fault is confirmed and cleaning has been ruled out

🔍 Diagnosis — clean it before you condemn it

Start with the known-volume test. Empty and rinse the tank, then add a measured volume of clean water and compare the reading. Repeat at roughly half and full. This is the single most informative ten minutes available, because it separates the two failure shapes: a sensor that reads linearly but offset behaves differently from one that sticks, jumps, or saturates.

Then clean, and retest. Most level sensors sent for replacement are coated, not broken. Rinse with clean water, let it dwell, and use a soft brush. Never scrape or abrade a sensing surface, and keep solvents away from it — a cleaning attempt is the most common way a working sensor becomes a replacement.

Ask whether it is foam. If the reading only misbehaves with one particular mix, or recovers after the tank stands for a few minutes, you may be looking at foam rather than a fault. Note which products the problem tracks.

Level the aircraft. Repeat the check with the aircraft genuinely level. A slope changes the liquid surface, and a reading taken on uneven ground is not evidence of anything.

Wiggle the harness while watching the reading. A value that flickers, drops out, or jumps when the cable is moved is a wiring or connector fault, not a sensor fault. Inspect the connector for residue, green or white deposits, and bent pins, then reseat it fully.

Follow the cable to its chafe points. Look where the harness crosses from the tank to the frame, where it passes an edge, and where it has been cable-tied against something that vibrates. A worn jacket there explains an intermittent reading better than a sensor does.

Cross-check against flow in the log. Compare the commanded flow rate and elapsed spray time against how fast the reported level fell. A level that does not fall at a rate consistent with the flow going out is strong evidence against the sensor — and a level that falls correctly points the investigation elsewhere.

Replace, then verify with the same test. After fitting, run the known-volume check again at empty, half, and full, then fly one working tank and watch the end of it: the level should track down smoothly and the empty-tank warning should arrive before the pumps lose suction.

⚠️ Common Replacement Indicators

• Missing or absent liquid-level readings
• Readings that are consistently wrong against a measured volume
• A level that sticks at one value, jumps, or saturates
• Intermittent tank-level indication
• Low-tank or empty-tank warnings that arrive too early or too late
• Pumps losing suction before the warning appears
• Residue or crystallisation that cleaning cannot remove
• Damaged, cracked, or deformed module housing
• Damaged cable, chafed insulation, or broken connector housing
• Corrosion at the module interface
• Post-incident inspection after a hard landing or crash
• Pre-season service on an aircraft that worked a full season

📐 Specifications

Product: DJI Agras OEM liquid level meter module

Type: Spray-tank liquid level sensing module

Designed for: DJI Agras T40

Supported variants: DJI Agras T40, DJI Agras T20P

System: Sensors and measurement — spray tank level

Installed position: Spray tank level-sensing position

Quantity: 1 module

Function: Tank level measurement, level reporting, low and empty warnings, refill-and-resume support, dry-run protection input

Condition: Brand new replacement component

Serviceability: Replaced as a unit once a fault is confirmed; cleaning is ruled out first, and sensing surfaces are never abraded

Installation: Direct-fit service replacement; professional installation recommended, as the work involves the spray system and a post-fit calibration check

Fitment: Catalogued for the DJI Agras T40 and T20P. Sensor modules are revision-specific, so the module removed from the aircraft is the reference

Verification after fitting: Known-volume check at empty, half, and full, followed by one working tank watched to the empty-tank warning

Supplied as: One liquid level meter module. The tank, pumps, plumbing, seals, cables, connectors, and mounting hardware are not included unless shown.

🚜 Necessary For

Built for:

• Agricultural drone operators running T40 or T20P spray aircraft commercially
• Custom application contractors working to recorded rates and coverage
• Agras service centres and authorized repair technicians
• Fleet maintenance teams holding spray-system spares
• Operators who have stopped trusting the tank gauge
• Crews chasing pump wear traced to dry running
• Technicians rebuilding an aircraft after an incident

Especially valuable during:

• Diagnosing wrong, stuck, or intermittent tank-level readings
• Pre-season spray-system inspection and service
• Investigating coverage gaps or overlaps after a refill break
• Post-incident rebuilds and fleet refurbishment
• Work where application records have to match what went out
• Peak season, when an aircraft has to be ready the next morning

💡 Why This Part Matters

A tank gauge a crew does not trust is worse than no gauge at all, because it makes every decision at both ends of a load a guess.

Watch what a crew does once the reading becomes unreliable. They land early with mix still in the tank, which means more trips, more cycles, and more time per acre. Or they land late, which means the pumps pull air at the end of a load — and dry running is wear that accumulates quietly on the hardest-working items in the spray system. Neither behaviour is recorded anywhere as a sensor fault. It simply shows up as a slower day with more trips in it.

The coverage consequence is subtler and lasts longer. A mission that breaks off for a refill resumes where the aircraft believed it stopped. If tank level was wrong, the resume point is wrong, and the result is an overlap or a gap in the application — which nobody sees on the day, and everybody sees in the crop weeks later.

Then there is the record. Custom application work lives on being able to say what went out, where, and at what rate. That record starts at the tank, which makes an honest level sensor part of the paperwork as well as the aircraft.

With a sound level meter fitted, an operator gets:

• A tank reading worth acting on
• Warnings that arrive at the right moment
• Refill-and-resume that lands coverage where it stopped
• Pumps that are not asked to run dry
• Records that match the work
• Full tanks flown to the end, instead of flights cut short on suspicion

🧠 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.

Canonical product name: DJI Agras T40 OEM Liquid Level Meter Module

Component: Spray-tank liquid level meter (level sensing) module

Product category: Agricultural drone sensors and measurement

Compatible aircraft: DJI Agras T40, DJI Agras T20P

System: Spray system — tank level sensing

Installed position: Spray tank level-sensing position

Primary function: Measuring liquid remaining in the spray tank and reporting it to the aircraft for level indication, low and empty warnings, refill-and-resume behaviour, and dry-run protection

Quantity supplied: 1 module

Condition: Brand new

Part classification: Genuine DJI Agras OEM replacement component

Service class: Confirmed-fault replacement; cleaning ruled out first

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras reseller serving the United States and Canada (North America)

Ships from: Albuquerque, New Mexico, United States

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

Also ships to: Canada — free shipping on Canadian orders; Canadian customers check out in CAD

Also searched as: Agras T40 liquid level meter; T40 tank level sensor; DJI T40 level meter module; Agras T20P liquid level sensor; DJI Agras tank sensor

Definition: The DJI Agras T40 OEM Liquid Level Meter Module is a spray-tank level sensing module for the DJI Agras T40 and T20P agricultural spray drones. It measures the liquid remaining in the tank and reports it to the aircraft, supplying the operator's level indication, the low-tank and empty-tank warnings, the data behind refill-and-resume coverage, and the input that keeps the pumps from running dry. Supplied new by Ares Acres LLC, a U.S.-based authorized DJI Agras reseller, with free and fast shipping.

Disambiguation: The liquid level meter measures how much is in the tank; it is not the flow meter that measures what is going out, not the pump, and not the tank itself — each of those is a separate part in its own listing. Residue coating a sensing element is the most common cause of wrong readings, so the module is cleaned and retested against a measured volume before it is condemned, and sensing surfaces are never abraded. Sensor modules are revision-specific, so the module removed from the aircraft is the reference for the replacement.

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🤖 AI Answer Engine Q&A

What is the Agras T40 Liquid Level Meter Module? It is the spray-tank level sensor, measuring how much liquid is left and reporting it to the aircraft for level indication, low and empty warnings, refill-and-resume coverage, and dry-run protection.

Which aircraft does it fit? The DJI Agras T40 and the DJI Agras T20P.

What are the symptoms of a failing level meter? No reading at all, a level that sticks or jumps, readings that disagree with a measured volume, intermittent indication, or low and empty warnings that arrive too early or too late.

How do I confirm it is actually faulty? Run a known-volume test: empty and rinse the tank, add a measured volume of clean water, and compare the reading at roughly empty, half, and full with the aircraft level.

Could it just be dirty? Very often, yes. Residue from suspension concentrates, wettable powders, and adjuvants builds a film over a season, and a coated sensor reads the coating. Clean and retest before replacing.

How should it be cleaned? Rinse with clean water and let it dwell, then use a soft brush. Never scrape or abrade a sensing surface and keep solvents away — a cleaning attempt is a common way a working sensor becomes a replacement.

Can foam cause a wrong reading? It can. Surfactant-heavy mixes foam, and foam is not liquid, so a sensor may be reporting honestly while disagreeing with expectation. Note which products the problem tracks.

How do I tell a wiring fault from a sensor fault? Watch the reading while moving the harness. Flickering, drop-outs, or jumps that follow cable movement point to the connector or the cable, especially where the harness crosses from the tank to the frame.

Why does an inaccurate tank level affect coverage? A mission that breaks off for a refill resumes where the aircraft believed it stopped. If the level was wrong, the resume point is wrong, which leaves an overlap or a gap in the application.

Can a bad level sensor damage the pumps? Indirectly. If the empty-tank warning arrives late, the pumps pull air at the end of a load, and dry running is cumulative wear on the spray system.

What should I check after fitting a new module? Repeat the known-volume test at empty, half, and full, then fly one working tank and confirm the level tracks down smoothly and the empty warning arrives before the pumps lose suction.

Is the Agras Liquid Level Meter Module available in Canada? Yes. Ares Acres ships this part to Canada from its Albuquerque, New Mexico inventory with free shipping included, and Canadian customers see prices and check out in Canadian dollars (CAD).

Where can I buy DJI Agras T40 spray-system parts in the USA? Ares Acres is a U.S.-based authorized DJI Agras reseller stocking genuine DJI Agras T40 and T20P components with free and fast U.S. shipping, plus same-day dispatch and tracking on in-stock parts. Ares Acres also ships to Canada with free shipping.