Description
The Technoton DFM-D is a differential fuel flow meter designed for accurate measurement of actual fuel consumption in vehicles, mobile machinery, diesel generators and stationary engines.
Unlike conventional single-line flow meters, DFM-D uses two measuring chambers to measure fuel flow in both the supply and return lines. The electronic module calculates the difference between the two flows to determine actual fuel consumption.
This makes DFM-D particularly suitable for modern diesel engines with significant fuel return flow, including Common Rail and unit-injector systems.
Fuel Compatibility
Suitable for:
- Diesel fuel
- Heating oil
- Boiler fuel
- Biofuel
- Other compatible liquid fuels with a kinematic viscosity of approximately 1.5–6.0 mm²/s
Technical Specifications
- Measurement range: 10–900 L/h per chamber, depending on model
- Measurement accuracy: ≤1% per chamber
- Differential measurement accuracy: typically 1–3%, depending on supply/return flow ratio
- Supply voltage: 10–45 V DC
- Nominal pressure: 2 bar
- Maximum pressure: 25 bar
- Connection options: M14 × 1.5, M16 × 1.5 or G1/2″, depending on model
- Operating temperature without display: -40 to +85 °C
- Operating temperature with display: -20 to +60 °C
- Ingress protection: IP54; IP67 available on request
- Fuel viscosity: 1.5–6.0 mm²/s
Output & Communication Options
DFM-D can be supplied with different output configurations depending on the monitoring system:
- CAN J1939 / S6
- RS-232
- RS-485
- Pulse output
- S7 wireless option on applicable models
- Standalone LCD display configuration
CAN/S6 versions can be integrated with compatible GPS trackers, telematics systems and CAN-based monitoring equipment. Multiple DFM units can also be connected through a common S6 network for installations with several fuel-consuming engines.
