gasoline flow meter 10 L/min

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# Oval Gear Flow Meter for Diesel: How to Get Accurate Fuel Measurement **Quick Answer:** For diesel fuel measurement, oval gear flow meters deliver ±0.5% accuracy across a wide viscosity range (10–1000 cP). They handle diesel at flow rates from 0.5 to 500 L/min with standard 4-20 mA HART output. Silver Instruments offers ATEX Zone 1 rated models for hazardous diesel environments. ## The Problem with Diesel Flow Measurement Diesel is not water. It has different viscosity, lower lubricity than crude oil, and it can contain contaminants. Many flow meter types struggle with diesel for specific reasons. Ultrasonic flow meters need clean fluid with consistent acoustic properties. Diesel can have varying density and entrained air bubbles. This causes reading drift. Electromagnetic flow meters require conductive fluid. Diesel is non-conductive. They will not work at all. Coriolis meters work great on diesel, but they cost 3–5 times more than oval gear meters. For a paint manufacturer in Southeast Asia that needed 15 diesel flow meters for their blending lines, Coriolis was too expensive. They switched to oval gear and saved 60% on their instrumentation budget. ## How Oval Gear Meters Measure Diesel The meter has two precision-machined gears inside a chamber. Diesel flows through, pushing the gears to rotate. Each rotation displaces a fixed volume of fluid. A magnetic pickup or hall effect sensor counts the gear teeth. The key advantage: oval gear meters are positive displacement devices. They measure actual volumetric flow regardless of viscosity changes. Diesel viscosity can shift from 2 cP at 40°C to 10 cP at 20°C. An oval gear meter handles this without calibration adjustment. Most engineers skip this part: oval ge gasoline flow meter 10 L/min

ar meters require a filter upstream. Last year a customer in Vietnam installed six meters without filters. Within three months, gear damage from diesel particulates cost them $2,400 in replacements. A simple Y-strainer with 100 mesh screen prevents this. ## Technical Specifications You Need For diesel flow measurement, here are the parameters Silver Instruments recommends: **Model:** SOGM-25 (DN25 connection) **Flow range:** 2 to 120 L/min **Accuracy:** ±0.5% of reading **Viscosity range:** 0.5 to 2000 cP **Max pressure:** 40 bar **Temperature:** -20°C to +120°C **Output:** 4-20 mA HART, pulse, or RS485 Modbus **Material:** 304 stainless steel body with PTFE or Viton seals **ATEX rating:** II 2G Ex d IIB T4 (Zone 1) For diesel bunkering on ships, we supply the SOGM-40 model with 100 L/min capacity and DN40 flanges. This model handles marine diesel with up to 5% biodiesel blend. A distributor in Port Klang, Malaysia ordered 22 units for coastal tankers last year. ## Installation Tips for Diesel Applications Here is the thing about diesel installation: you must vent the line before the meter. Air in diesel creates measurement errors. Install a vent valve directly upstream. The pipe should be full of diesel at all times. If the meter runs partially empty, the gears lose contact with fluid and accuracy drops. Use a back pressure valve after the meter if gravity feed is possible. For hot diesel (above 60°C), mount the meter with the electronics facing down. This prevents heat rising into the sensor housing. A food processing plant in Thailand used our meters for fryer oil diesel supply. They mounted them sideways and had sensor failures every 6 months. After rotating the installation to vertical with electronics down,

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