Fuel Nozzle | 1-Inch BSP Flow Meter | Automatic Shut-Off for Gas Diesel

This fuel nozzle pumps up to 60 liters per minute of diesel or petrol with real-time digital tracking. Cast aluminum protects the valve assembly from heavy yard use. An internal sensor triggers an automatic shutoff when the tank fills, keeping your site clean and preventing fuel loss. Features and Benefits - Venturi automatic shutoff - Closes the internal valve the moment fuel covers the spout tip to stop tank overflows - Built-in digital display - Tracks current batch volume and overall totals with +/- 0.5% accuracy and supports simple recalibration - 1-inch BSP inlet swivel - Turns freely to stop the hose from kinking and threads right onto 1-inch lines - Cast aluminum housing - Handles knocks and drops in working yards while keeping overall weight to 1.3 kg Applications - Pumping diesel into tractors, combines, and diggers straight from mobile service trailers - Tracking fuel delivery at transport yards to monitor usage across company trucks - Transferring measured fuel batches out of stationary bulk tanks into work vans Safety & Materials The body is manufactured from aluminium alloy, providing a durable build suited for diesel and petrol transfer. When handling hydrocarbon fuels, always earth your delivery pipework to prevent static discharge from sparking vapours. Ensure all threaded joints use fuel-resistant PTFE tape or thread sealant compatible with petroleum. Inspect the 25 mm bore spout regularly for grit or swarf that could obstruct internal passages. How does a fuel nozzle shut off? It uses an internal venturi port near the tip. When fuel covers this intake hole, the vacuum trips a mechanical diaphragm to cut the supply instantly. Core Parts Needed: To build an external monitoring setup or understand how to make a fuel flow meter rig, source these components: - The supplied fuel nozzle with 1-inch BSP inlet thread - 25 mm bore delivery hose rated for fuel use - An inline turbine sensor with a pulse output or pickup sensor - An internal stainless steel rotor assembly - Microcontroller running on 5V logic - Regulated 12V DC power supply for mobile pumping skids - Fuel-rated 1-inch BSP male-to-male brass or steel hex nipples - Pull-up resistor for the sensor signal line Hardware Connection & Schematic Thread the 1-inch BSP nozzle directly into your delivery hose using a matching swivel fitting. If integrating a pulse-based flow sensor upstream, mount it horizontally in a straight hose run to avoid turbulence. Connect the sensor ground to the microcontroller ground rail. Wire the sensor power feed to your 5V or 12V supply depending on the pickup sensor rating. Bridge the pulse signal line to the 5V rail with a 4.7k ohm pull-up resistor. Route the signal pin into a hardware interrupt terminal on your board to register every rotor pulse reliably during fast fuel delivery. Calibration & Math Understanding how fuel flow meter works requires calculating pulses against volume. Inside the housing, fuel drives a turbine sensor whose rotation speed matches the fluid velocity. Each revolution triggers the digital flowm electronics. To calibrate, dispense an exact 20-litre batch into an approved measuring container. Count the registered pulses. Divide the total pulses by 20 to establish your calibration factor, known as the K-factor in pulses per litre. If 20 litres generates 9,000 pulses, your factor is 450 pulses per litre. Adjust this figure if fluid viscosity alters your real-world volume readings. Arduino Code Example volatile unsigned long pulses = 0; const byte interruptPin = 2; const float kFactor = 450.0; void countPulse() { pulses++; } void setup() { Serial.begin(9600); pinMode(interruptPin, INPUTPULLUP); attachInterrupt(digitalPinToInterrupt(interruptPin), countPulse, RISING); } void loop() { static unsigned long lastCheck = 0; if (millis() - lastCheck >= 1000) { lastCheck = millis(); noInterrupts(); unsigned long currentPulses = pulses; interrupts(); float litres = currentPulses / kFactor; Serial.print("Dispensed: "); Serial.print(litres, 2); Serial.println(" L"); } }