2.1 Pulse Meter Selection

Select a pulse meter suitable for the flow and pipe size. Never reduce a pipe to suit a pulse meter.

Typical flow rates of meters are as follows

Metric	Imperial	Typical Flow*	Max Flow*	units
12mm	1/2"	10	15	lpm
19mm	3/4"	30	40	lpm
25mm	1"	50	100	lpm
32mm	1 1/4"	100	140	lpm
40mm	1.5"	150	200	lpm
50mm	2"	250	400	lpm
80mm	3"	500	800	lpm

Note*: Subject to viscosity. Lubricants much higher viscosity than diesel.

2.1.1 Fluid Compatibility

Be sure to choose a meter with materials suitable to the fluid and environment.

• Diesel is compatible with Aluminium meters and just about any other material
• Adblue (DEF) must be used with Stainless Steel meters
• Some specialised lubricants and chemicals require specific meter selection
• Some meters are made of plastics and polymers and may not be suitable from a wear and tear perspective

2.1.2 Hall Effect Overview

Hall effect meters produce the most consistent and reliable outputs. They generally perform better over a long period of time. Hall effect meters are more accurate with higher repeatability.

For high flow situations or applications that require a hihg confidence in the fuel measurement a hall effect meter is recommended.

Hall effect meters require power to operate.

2.1.3 Reed Overview

Reed meters do not require power. They are usually available as cheaper options.

Where fuel volume measurements is not so critical reed meters are acceptable.

2.1.4 Meter Display

In some applicaitons it is advisable to use a meter display with the FMS. Where Fuellox is retrofit to an existing system there may be an existing mechanical meter.

Pulse meters tend to be more accurate than mechanical meters.

We advise that a digital meter display is used in conjunction with the pulse meter.

This approach ensures that only one meter needs to be calibrated, and that differences do not appear between the two different displays.