Differential flow meter DFM 900D

volumefor fuelfor diesel

Overview
DFM 900D is a differential fuel flow meter engineered for heavy-duty diesel engines with typical consumption around 100–120 L/h. It bridges the capacity gap between DFM 500D and the DFM Marine series, offering a single-unit differential solution for applications that previously required two meters. DFM 900D can operate standalone or be integrated into fleet telematics for fuel reporting, CO2 emissions tracking and remote diagnostics.

Designed for heavy-duty applications

• 300–400 kW diesel generator sets (gensets)
• Mid-size tugboats and workboats
• Heavy excavators and 40–60 t mining dump trucks
• Large bulldozers
• Railway maintenance and track machines

Operational notes
Typical engine burn is ~100 L/h while fuel supply-line flow can reach up to 800 L/h. Installers often used two single-chamber meters in differential mode; DFM 900D consolidates that capability into one compact unit, reducing plumbing complexity and installation time.

Fuel monitoring and telematics
DFM 900D delivers direct measurements of actual fuel burn (not estimates). It supports integration with telematics systems to transmit fuel-rate data for reporting and analysis, enabling more accurate CO2 emissions calculations and remote fault detection through analysis of flow patterns.

DFM 900D technical specifications

• Model: DFM 900D
• Minimum flow per chamber: 150 L/h
• Maximum flow per chamber: 900 L/h
• Nominal diameter: DN 15 mm
• Connection thread: G 1/2"
• Measuring chamber material: Brass (machined from solid stock)
• Calibration interval: 900,000 liters
• Typical engine consumption range: 100–120 L/h
• Typical supply-line flow (may reach): up to 800 L/h

DFM 900D within the Technoton lineup

• DFM 100D — 100 L/h — 10–15 L/h — Pickups, small tractors, light trucks
• DFM 250D — 250 L/h — 20–30 L/h — Mid-size tractors, long-haul trucks, mid-range gensets, small boats
• DFM 500D — 500 L/h — 50–70 L/h — Large tractors, agricultural machinery, small tugboats, diesel generator sets
• DFM 900D — 900 L/h — 100–120 L/h — 300–400 kW gensets, mid-size tugboats, heavy construction equipment, railway machinery, mining equipment

Use cases

• Gensets: containerized and stationary 300–400 kW diesel generator sets where compact differential metering is required
• Marine: mid-size tugboats, workboats and river cargo vessels with rigid fuel tubing and limited space
• Construction and mining: heavy excavators, mining dump trucks and bulldozers where faster installation reduces downtime
• Railway equipment: motor trolleys, shunting vehicles and track maintenance machines consuming ~100–120 L/h

Choosing a fuel flow meter: reasons to select DFM 900D or two DFM Marine 1000 meters

• Choose DFM 900D when installation space is limited, installation speed matters, or supply and return lines are close together.
• Choose two DFM Marine 1000 meters when supply and return lines are far apart, extra headroom for supply-line flow is required, and there is sufficient mounting space.