Turbine Meters

Turbine Meter Wiring

In certain applications—particularly with smaller tanks—a low-profile, cost-effective solution is preferred. For these scenarios, a Turbine Meter is an ideal option.

• Turbine meters offer a compact and affordable alternative, though they are less accurate than positive displacement meters. A typical accuracy variance of ±1% should be expected.

• Installation best practice requires positioning the meter after the pump, as turbine meters are not designed to function effectively on the suction side.

• When a filter is installed, make sure the meter is placed downstream of the filter to maintain accuracy and avoid flow disruption.

Parts

#	Part	Note
1	FLX-R	Fuellox with Relay (Note 1)
2	Meter	Turbine meter with hall effect
3	12V	12V power source, or 24V if the meter can also take 24V
-	Standard Fuellox	An additional relay is required

Note 1

The standard Fuellox fused relay is rated for a peak load of 30 amps. Relays should always be appropriately oversized to ensure reliability. For applications with higher current demands, ensure that a suitable, higher-rated relay is installed.

Wiring

From	To	Description	Colour
12V +	Fuellox VBat	Fuellox Power	Red
12V +	30 Relay Supply	Pump Active Power	Red
12V -	Fuellox GND	Fuellox GND	Black
12V -	Pump GND	Pump GND	Black
Relay Active	87 Pump Supply	Pump GND	Black
Pulse 12V	Meter Red		Red
Pulse signal	Meter Yellow		Yellow
Pulse 0V	Meter Black		Black
Fuellox Out 1	86 Relay Coil		White
GND	85 Relay Coil 0V		White

Wiring Diagram

The following diagram shows how the Fuellox controller connects to a turbine meter, 30A relay, and 12V DC power to control pump operation.

Optional Emergency Stop

Install a dual-pole switch with latching Normally Open (NO) and Normally Closed (NC) contacts.

• The Normally Closed channel should be wired between the Relay Active line and the Pump 12V supply.
• The Normally Open channel should be connected between the Fuellox Input (IN1–IN4) and GND.

Note

Make sure the Emergency Stop (EStop) feature is enabled in the Device Configuration.

Calibration

Turbine meters usually offer accuracy within ±2%. While standard calibration methods are generally sufficient, using a calibrated jug may not always be appropriate for every scenario.

Calibration by weight

Begin with a heavy-duty, calibrated scale—preferably one that offers high precision and reports at least one or two decimal places. The selected scale should be suitable for the expected weight range.

For example: If calibrating for 20L of diesel, avoid using a scale with a 20kg maximum capacity.

Steps

1. Zero the scale.

2. Weigh the empty container.

3. Fill the container with fuel and weigh the total.

4. Subtract the empty container’s weight from the total to determine the fuel’s weight.

5. Divide the fuel weight by the fuel’s density (refer to the density on the fuel delivery docket) to calculate actual fuel volume.

6. This value is your actual fuel volume for calibration purposes.

Tip

Repeat this process three times to ensure consistency and accuracy. Record the average value.

Note

If assistance is required to apply the calibration data, please contact the Fuellox Support Page or Contact Fuellox customer service.

Fuellox Calibration

To calibrate your Fuellox device, please refer to the Calibration guide for detailed instructions and step-by-step guidance.

Verifying the Calibration

To confirm the accuracy of the new calibration:

• Empty the calibration vessel.

• Repeat the dispense and measurement process as outlined previously.

• Make sure the measured volume (by weight) aligns with the volume reported by Fuellox, within a margin of ±2%.