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Micro Flow Meter: Precision Miniature Sensors for Low Fluid Rates
Quick Answer: Micro flow meters bring accuracy to dosing, injection, and research applications where flow rates fall below 100 L/h. Silver Instruments supplies oval gear, thermal mass, and micro Coriolis sensors that handle liquids and gases from 0.005 kg/h upward. Send us your fluid, flow range, pipe connection size, pressure, and temperature, and we will return a commercial offer within 24 hours.
Why Micro Flow Meters Are Different from Standard Flow Meters
Standard flow meters lose grip when velocity drops. A DN50 electromagnetic meter often drifts below 0.5 m/s. In catalyst dosing, aroma injection, or lab-scale hydrogen feed, that drift translates into batch failure. Micro flow meters work with internal volumes measured in milliliters and flow paths from DN1 to DN10. We saw this on a customer site in Vietnam where a chemical dosing pump paired with a standard turbine meter caused 30 percent mass balance errors. Replacing it with a micro oval gear meter tightened repeatability to 0.5 percent and eliminated rework. Because the micro sensor captures every pulse, there is no need to oversize the meter or live with guesswork.
Sensor Technologies We Offer for Low Flow Rates
Silver Instruments builds three micro flow meter families. Oval gear positive displacement sensors cover liquid flows from 0.05 L/h to 30 L/h and handle viscosities up to 1000 cP without linearity drift. Thermal mass meters measure clean gas micro flows, starting at 0.2 SCCM and reaching 100 SLPM, with sensor elements in 316L or Hastelloy. Our micro Coriolis meters work on liquids and gases, reporting mass flow directly at rates as low as 0.005 kg/h with base accuracy of 0.1 percent of rate. All three sensor types offer 4-20 mA HART, pulse output, and RS485 Modbus as standard. Intrinsically safe and ATEX Zone 1 certifications are available for solvent and fuel gas atmospheres.
Real Applications Where Micro Flow Meters Pay Back Fast
A paint supplier in Malaysia uses a micro oval gear unit to add hardener into 2K polyurethane lines at 0.2 L/min. The old peristaltic pump timer drifted with tube wear and caused over 3 percent rework. Now they log batch totals and hold 0.5 percent repeatability. An Australian desalination lab tracks hydrogen flow into a fuel cell test rig with one of our thermal mass sensors at 50 mL/min. They need no custody transfer, just repeatable R and D data. In a Singapore oleochemical plant, a micro Coriolis meter doses antioxidant into biodiesel at 0.3 kg/h, where density shifts from upstream temperature changes. The Coriolis ignores density and gives true mass flow. These are not marketing stories. We shipped these exact builds in the last twelve months.
Technical Details That Matter to Engineers
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How to Order a Micro Flow Meter from Silver Instruments
Send us the operating picture. State fluid name, viscosity in cP, required flow range, upstream pressure in bar, temperature in °C, pipe connection size and thread type, and whether you need ATEX or food-grade certification. Here is the thing: the more detail you provide, the fewer clarification loops we need. Reach us by email at [email protected] or call Tel: +86-135-1213-1526. You can also message us on WhatsApp at 86-135-12131526 or WeChat: +86 13512131526. Our application engineers will return one or two recommended models with data sheets and a fixed-price quote, usually the same working day.
Micro Flow Meter FAQ
What is the smallest flow a micro flow meter can detect? With Coriolis principle we measure down to 0.005 kg/h for liquids. For gases, thermal mass meters detect 0.01 SLPM. Oval gear micro meters start at 0.05 L/h for thin fluids.
Can these meters handle high-viscosity fluids like honey or heavy fuel oil? Oval gear micro meters work with viscosities up to 1000 cP with only a small shift in K-factor. For higher viscosities, we recommend pressure-fed versions. Coriolis meters are viscosity-independent, making them a strong choice for non-Newtonian fluids.
Are micro flow meters suitable for explosive atmospheres? Yes, we supply intrinsically safe and ATEX Zone 1 certified models for gas and dust groups. Specify your hazardous area classification in the inquiry and we will match the certificate.
How do I choose between oval gear and Coriolis for low liquid flow? Oval gear costs less and handles high viscosity well. Coriolis gives mass flow, handles density variation, and responds faster. If your liquid density changes with batch or temperature, go Coriolis. If you need simple volume totalizing, oval gear wins.
What outputs do these micro sensors provide? Standard outputs are 4-20 mA HART, pulse, and RS485 Modbus RTU. Some thermal mass meters also include a local LCD totalizer and relay outputs for high or low flow alarms.