How to Read an Agricultural Spray Drone Spec Sheet
Learn how to interpret spray drone spec lines for payload, flow, nozzles, accuracy and limits—so your setup matches the sheet.
Start with what the spec sheet is actually measuring
A spray drone spec sheet mixes several kinds of data. Read each line by asking whether it affects coverage, stability or an operating limit.
- DJI Agras T100 100 L
- DJI Agras T50 40 L
| Model | Value |
|---|---|
| DJI Agras T100 | 100 L |
| DJI Agras T50 | 40 L |
Sources: ag.dji.com, ag.dji.com
Aircraft specs describe the airframe. They include weight, maximum take-off weight, dimensions and rotor layout. These lines help with loading, transport and clearance, but they do not tell you the spray rate.
Spraying specs cover the tank, operating payload, pumps, flow rate and nozzle layout. These are the main lines for judging how much solution the drone can carry and how fast it can release it.
Control specs cover GNSS or RTK accuracy, the controller link and sensing systems. They help define path repeatability, control range and the conditions in which safety systems can work.
Keep those groups apart when comparing aircraft. The wider list of drone specifications is useful for checking whether two product pages describe the same kind of figure.
Read the label before the value
A value means little without its label and test condition. “Weight” is not the same as “maximum take-off weight”. Tank volume is not always the same as operating payload.
Configuration also matters. The DJI Agras T100 has a maximum take-off weight for spraying of 175 kg in its standard spraying configuration. Its maximum take-off weight for lifting is 165 kg. Those figures describe different setups and should not be merged.
The DJI Agras T50 shows the same issue across spraying and spreading. Its maximum take-off weight is 92 kg for spraying at sea level and 103 kg for spreading at sea level.
Power and flight limits: when the drone can work
Buyers often look for one flight-time figure. That figure is only useful when the sheet also states the payload, battery setup and test conditions.
Battery capacity by itself does not give spray time. Flight time changes with the load and the work being done. A sheet that omits tested spray endurance leaves that part of the field plan unanswered.
Do not estimate it from tank size or maximum flow. Flow describes the liquid system, while flight time describes the aircraft under a stated load. They are linked during work, but they are not the same measure.
Operating temperature and wind resistance
An operating-temperature line sets a boundary for the part named in that section. Check the heading carefully. A controller temperature range does not prove that the aircraft or spray system has the same range.
The DJI Agras T100 aircraft operating temperature is 0 °C to 40 °C. Its listed maximum wind resistance is below 6 m/s.
The DJI Agras T50 lists maximum wind resistance of 6 m/s. Its remote controller has an operating-temperature range of -20 °C to 50 °C. That controller figure should not be relabelled as an aircraft limit.
Wind resistance is also not a promise of good spray placement. It tells you about the aircraft limit, not the behaviour of droplets over the crop. Nozzle choice, droplet size and spray height still need their own checks.
GNSS and RTK accuracy
Positioning figures tell you how closely the aircraft can hold a stated position under the listed conditions. For spray work, they help you judge path repeatability between runs.
The DJI Agras T100 lists RTK hovering accuracy of ±10 cm horizontally and ±10 cm vertically. The DJI Agras T50 lists the same RTK hovering accuracy.
The more detailed sheet for the DJI Agras T50 gives weaker figures when RTK is disabled: ±60 cm horizontally and ±30 cm vertically. Its vertical figure can be ±10 cm with the radar module enabled. This is why a single headline accuracy figure should never be read without its operating mode.
Hovering accuracy is not the same as full route accuracy in every field condition. Still, the RTK and non-RTK values show how much the positioning mode can change the stated result.
Weight and payload: check what is included
Weight lines can refer to the bare aircraft, a battery-equipped aircraft or a full working configuration. The wording determines whether the value can be used in a loading check.
The DJI Agras T50 weighs 39.9 kg excluding the battery and 52 kg including it. Reading only the lower figure would leave the battery out of the comparison.
Maximum take-off weight is the upper aircraft figure for the stated configuration. It is not another name for chemical capacity. Operators must account for all items included in the working setup rather than subtracting an unclear “weight” value.
Tank volume and operating payload are different
Tank volume describes space for liquid. Operating payload describes mass. Do not treat litres and kilograms as if they were interchangeable labels.
The DJI Agras T100 has a 100 L spray tank. Its standard spraying system lists a 100 kg operating payload.
The DJI Agras T50 has a 40 L spray tank and a 40 kg operating payload. Its maximum take-off weight for spraying is 92 kg at sea level.
These lines let you check whether the sheet gives both volume and load. They do not show that every mix can fill the tank to its full volume while staying within the load figure. The product and chemical instructions must settle that point.
Tank, flow and tank material
The tank section should state material, volume and operating payload. If one is missing, record it as missing rather than filling the gap from a similar aircraft.
The detailed DJI Agras T100 specification lists an HDPE spray tank. The detailed DJI Agras T50 specification describes its spray tank material as plastic, with HDPE stated in brackets.
Material is a starting point for a compatibility check, not the final answer. The sheet must also give suitable guidance for the spray mix, seals and other wetted parts. A tank material line alone cannot settle the whole chemical path.
What maximum flow rate tells you
Maximum flow rate shows the highest listed liquid delivery rate for a stated spray setup. It is not the normal rate for every job.
The DJI Agras T100 has a maximum flow rate of 30 L/min. The optional four-nozzle configuration raises the listed maximum to 40 L/min.
The DJI Agras T50 has a maximum flow rate of 16 L/min with two sprinklers and 24 L/min with four sprinklers. Comparing only the larger value would hide the change in sprinkler setup.
To estimate theoretical tank-emptying time, divide usable tank volume by the chosen flow rate. Do not use maximum flow unless the planned setup and rate call for it.
That result is only a liquid-system estimate. It does not include turns, pauses, route changes, refilling or any reserve. Nor does it prove that the aircraft can stay aloft for the same period.
Nozzles and spraying hardware
Start with the name of the spraying system, then read its nozzle count, nozzle type and pump data as one group. The system heading is the architecture; the other lines describe how that system is fitted.
The DJI Agras T50 specification calls its setup a dual atomising spraying system. It lists two sprinklers as the standard quantity, while its flow data also gives a value for a four-sprinkler setup.
The DJI Agras T100 uses two nozzles in its standard spraying configuration and four in the optional configuration. Its weight, maximum take-off weight and maximum flow all change with that choice.
That is an important reading rule: an option in one row may alter several other rows. Check weight and flow again when the nozzle setup changes.
Nozzle count alone does not prove coverage quality. You also need the stated droplet range, spray width, flow and test conditions. If the sheet omits those points, leave them open for a field demonstration or written supplier answer.
Swath and guidance accuracy
Effective spray width is the closest spec-sheet value to a working swath. Use it for early route planning, but keep its stated conditions attached.
The DJI Agras T100 lists an effective spray width of 5 m to 13 m. The DJI Agras T50 lists 4 m to 11 m at a height of 3 m above the crops.
A range is not one fixed working width. The correct value within that range depends on the setup and conditions described by the maker. Do not plan from the widest figure without checking those conditions.
Once you choose a working swath, RTK accuracy helps you judge how repeatably the drone can follow adjacent runs. Better stated repeatability gives more control over planned overlap. It does not remove the need to verify spray placement in the field.
If no spray width appears, positioning accuracy cannot replace it. RTK can describe path control, but it does not state how far the liquid pattern extends from that path.
Controller and telemetry basics
Controller frequency tells you which radio bands the control link uses. Maximum transmission distance states a tested link distance under named conditions. Neither line should be read as permission to operate at that distance.
The DJI Agras T50 remote controller uses 2.4000–2.4835 GHz and 5.725–5.850 GHz. Its listed maximum transmission distance is 7 km under FCC conditions, 5 km under SRRC conditions and 4 km under MIC/CE conditions. Those results assume an unobstructed area, no interference and an altitude of 2.5 m.
The DJI Agras T100 product data supplied here gives a safety-system range of no more than 60 m. That is a sensing-system value, not a controller transmission range. Similar units do not make the two figures comparable.
Flight modes need the same care. A procurement specification may list manual and autonomous modes, but each product sheet must state what its modes actually do. Do not infer autonomous spray features from a general class description.
A spec-to-buy checklist
Before comparing models, copy these fields into the same order:
- Spray tank material and volume
- Operating payload
- Aircraft weight, with battery status
- Maximum take-off weight for the spray configuration
- RTK and non-RTK positioning accuracy
- Aircraft operating temperature
- Maximum wind resistance
- Spray-system type
- Standard and optional nozzle count
- Maximum flow for each nozzle setup
- Effective spray width and its test conditions
- Controller frequency and transmission conditions
Mark any missing field as “not stated”. Do not borrow a value from another configuration, another product page or a controller section.
Then check whether the figures describe the work you plan to do. Tank and flow shape the liquid plan. Weight and maximum take-off weight shape the loading check. Wind, temperature and positioning data shape the operating window.
Finally, ask for proof where the sheet stops. Field demonstrations should use the intended nozzle setup, working swath and spray rate. For more checks that can be carried into a buying review, see the guides index.