Macnaught
Positive Displacement Flow Meter with Pulse Output
Positive Displacement Flow Meter with Pulse Output
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Positive Displacement Flow Meter with Pulse Output
High-accuracy positive displacement oval gear flow meter with raw square pulse output, designed for fuel measurement and industrial fluid monitoring. Compatible with PLC systems and a wide range of displays. This meter is the ideal choice for diesel fuel consumption monitoring, batch control, chemical dosing, and automated fuel transfer systems where real-time data logging is required.
Specifications
| Body Material | Aluminium |
| Rotors | Polyphenylene Sulfide (PPS) |
| Seals | Viton O-ring |
| Shafts | Stainless Steel |
| Accuracy | ±0.5% |
| Repeatability | ±0.03% |
| Operating Temperature | -40°C to +120°C |
| Max Pressure | Up to 128 bar (depending on size) |
| Power Supply | 5–24V DC |
| Pressure Drop | Approx. 2–5 kPa (depending on size) |
| Output Signal | Raw square pulse — Reed / Hall Effect (NPN open collector) |
| Compatibility | PLC systems and many displays |
| Includes | Calibration certificate |
| Warranty | 2 years manufacturer warranty |
Available Sizes
- 2–100 LPH — 1/4" connection
- 10–1000 LPH — 1/4" connection
- 2–35 LPM — 1/2" connection
- 3–70 LPM — 3/4" connection
- 6–160 LPM — 1" connection
- 10–350 LPM — 1-1/2" connection
- 15–580 LPM — 2" connection
Each size is available in both BSPP and FNPT thread connections. Select your required size and thread type from the dropdown menu above.
Frequently Asked Questions
What is a positive displacement flow meter with pulse output used for?
A positive displacement flow meter with pulse output is used to measure the volumetric flow of liquids like diesel fuel, oil, and chemicals with high accuracy. The pulse output signal connects directly to PLCs, SCADA systems, batch controllers, and fuel management displays, enabling automated monitoring, data logging, and process control in industrial and commercial applications.
Can this flow meter connect to a PLC or SCADA system?
Yes. This meter outputs a raw square pulse signal via NPN open collector (Reed or Hall Effect sensor), which is directly compatible with PLC digital inputs, SCADA RTUs, batch controllers, and third-party fuel management displays. It operates on 5–24V DC and requires no signal conditioning.
What size flow meter do I need for my application?
Choose based on your flow rate: 2–100 LPH or 10–1000 LPH (1/4") for low-flow chemical dosing or lab use; 2–35 LPM (1/2") for small engines; 3–70 LPM (3/4") for generators; 6–160 LPM (1") for medium diesel transfer; 10–350 LPM (1-1/2") for bulk fuel; 15–580 LPM (2") for high-volume industrial. Each is available in BSPP or FNPT threads. Contact RAZQUIP for sizing assistance.
Is this meter suitable for high-pressure applications?
Yes. Depending on the size selected, this meter handles up to 128 bar working pressure and operates across a wide temperature range of -40°C to +120°C. The aluminium body with stainless steel shafts and Viton seals provides durability in demanding industrial environments.
