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Precision flow measurement for heavy-duty machinery – The OEM W3700150400004 Elliptic Gear Flowmeter is engineered to provide real-time, accurate monitoring of fuel, hydraulic oil, and lubricant consumption. Trusted by fleet managers worldwide, this device ensures optimal engine efficiency and reduces waste. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts. The elliptic gear mechanism delivers high repeatability and is immune to viscosity changes, making it ideal for diesel, biodiesel, and hydraulic fluids.
The W3700150400004 elliptic gear flowmeter operates on the positive displacement principle, providing accuracy of ±0.5% of reading across a wide flow range. Unlike turbine or orifice meters, elliptic gears are less affected by fluid viscosity changes, making them perfect for variable fuel grades and hydraulic oils. The robust stainless steel housing and hardened gears ensure reliable operation even in harsh off-road environments.
Two precision-machined elliptical gears rotate with minimal clearance, creating fixed displacement pulses. The W3700150400004 delivers exceptional repeatability even at low flow rates down to 1 L/min.
Housing made of cast aluminum with epoxy coating, gears from hardened tool steel. The flowmeter withstands pressures up to 40 bar and temperatures from -20°C to +120°C.
Factory calibrated across 2‑150 L/min range, ±0.5% accuracy. Ideal for fuel consumption monitoring, hydraulic system efficiency analysis, and leak detection.
| OEM Number | W3700150400004 |
| Product Name | Elliptic Gear Flowmeter |
| Brand | SINOTRUK Homan |
| Measuring Principle | Positive displacement – elliptic gear |
| Flow Range | 2 – 150 L/min (standard), 1 – 200 L/min optional |
| Accuracy | ±0.5% of reading (over 10% of max flow) |
| Repeatability | ±0.1% |
| Max Pressure | 40 bar (580 psi) |
| Viscosity Range | 1 – 1000 cP |
| Temperature Range | -20°C to +120°C |
| Output Signal | Hall effect sensor / NAMUR (2-wire), 0‑1000 Hz |
| Process Connections | G1″ BSPP or 1″ NPT female |
| Material | Aluminum housing, hardened steel gears, FKM seals |
| Ingress Protection | IP65 (with mating connector) |
The W3700150400004 elliptic gear flowmeter consists of two interlocking elliptical gears that rotate as fluid passes through. Each full rotation displaces a precise volume, generating a series of electronic pulses proportional to the flow rate. The magnetic Hall-effect sensor is completely isolated from the fluid, eliminating leakage risks. This design makes the W3700150400004 extremely resistant to vibration and temperature extremes, ideal for on-road and off-road heavy vehicles.
The W3700150400004 is compatible with diesel, biodiesel B20, hydraulic oils (ISO VG 32‑68), engine lubricants, and light fuels. FKM seals resist aggressive additives, while the hardened steel gears maintain accuracy even with small particulates (recommended filtration ≤100μm). SINOTRUK Homan provides a traceable calibration certificate with each meter, ensuring confidence in your data.
The W3700150400004 provides a standard NPN open-collector pulse output (0‑1000 Hz) that connects directly to most ECU, tachograph, or remote monitoring units. For CAN bus integration, an optional interface module is available. The meter can be installed in any orientation, and bidirectional measurement is supported for return-line metering applications. Fleet operators can track fuel consumption per vehicle with minimal installation effort.
For correct installation of the W3700150400004 flowmeter, follow these steps: 1) Mount the meter with the arrow in the direction of flow. 2) Ensure straight pipe runs of at least 10× diameter upstream and 5× downstream for optimal accuracy. 3) Install a 100-mesh strainer upstream if the fluid may contain debris. 4) Connect the pulse wires to a 5‑24V DC supply via a 2.2kΩ pull-up resistor. 5) Torque process connections to 35 Nm maximum. 6) Purge air from the system by running fluid at low flow before taking measurements.
The W3700150400004 requires minimal maintenance. Annually inspect the electrical connector and housing for damage. If the meter drifts out of specification, return it to an authorized SINOTRUK Homan service center for recalibration – never attempt field disassembly, as the internal gear clearances are factory-set. For heavily contaminated fluids, a periodic cleaning flush with clean solvent (without disassembly) is acceptable.
The W3700150400004 elliptic gear flowmeter is manufactured under ISO 9001:2015 and ISO 17025 accredited calibration procedures. It complies with CE and RoHS directives. Each device is wet-calibrated on a gravimetric test bench with traceability to international standards. The calibration certificate includes 10 points across the flow range. Additionally, each unit passes a 15-bar proof pressure test and a 48-hour thermal cycling test from -20°C to +80°C, ensuring reliability in extreme conditions.
A European logistics company installed the W3700150400004 on 150 trucks for fuel consumption monitoring. Over two years, they detected a 7% reduction in unauthorized fuel consumption and identified underperforming vehicles, saving over €120,000 annually. A mining operation in Australia used these flowmeters to monitor hydraulic oil usage on excavators, enabling predictive maintenance and reducing unscheduled downtime by 30%. These real-world results prove the value of the W3700150400004.
Each W3700150400004 elliptic gear flowmeter is supplied in a heavy-duty carton with custom foam inserts, including the meter, two BSPP adapters, NBR seals, and the calibration certificate. A laser-etched serial number and QR code are permanently marked on the housing. Scanning the QR code redirects to the SINOTRUK Homan verification portal, confirming authenticity. Always purchase from authorized distributors – counterfeit meters often use soft gears and lack traceability.
Summary: The SINOTRUK Homan Elliptic Gear Flowmeter (OEM W3700150400004) offers high accuracy, robust construction, and easy integration. Upgrade your fleet monitoring system with this genuine OEM component, trusted by professionals in over 50 countries.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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