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『Intek Flow Meter: Rheotherm Thermal Dispersion Manual for Micro-Flow Liquid and Gas Processing』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
Intek Rheotherm Thermal Dispersion Manual for Micro-Flow Liquid and Gas Processing: Silver Instruments Selection Data
Quick Answer: For micro-flow liquid and gas processing, a thermal dispersion meter with a wetted sensor and direct mass flow output covers low flow ranges that electromagnetic and Coriolis meters often miss. Silver Automation Instruments supplies inline thermal mass flow meters for gas from 0.5 sccm to 50 slpm and liquid from 5 g/h to 10 kg/h. Send your fluid type, flow range, pipe size, pressure, and temperature for a fixed quote.
Where the Intek Rheotherm Manual Data Fits in Your Process
The Intek Rheotherm thermal dispersion manual for micro-flow liquid and gas processing covers sensor selection, installation position, pressure drop, and calibration. Most engineers use this data for pilot plant upgrades, catalyst feed lines, and analyzer loops. The same logic applies to small bore tubing from 1/8 inch to DN15. In practice, the main concern is not just accuracy at 25 °C. You also need repeatability when temperature or pressure shifts during a batch. Silver Instruments builds its thermal mass flow meters for these variable low flow conditions.
Typical Flow Ranges and Process Conditions
Gas micro-flow usually starts at 0.5 sccm air equivalent. The upper gas range for a single inline meter is often 50 slpm. Liquid service for this type of sensor starts at 5 g/h for low viscosity fluids. For water-like liquids, a thermal meter handles 0.1 kg/h to 10 kg/h in a DN4 or DN15 body. Viscosity effects show up above 50 cP. In those cases, the sensor needs a wet calibration with the actual fluid because heat transfer changes with viscosity. Pressure ratings up to 100 bar are possible with 316L wetted parts. Temperature spans from 0 °C to 70 °C as standard. Higher temperature versions go to 150 °C with a remote electronics option.
Gas and Liquid Calibration Differences
The Intek Rheotherm manual separates gas and liquid calibration because thermal dispersion responds to the heat capacity of the fluid. Air equivalent calibration works for many gases if you apply the correct gas correction factor. But for micro-flow liquid service, a water or solvent calibration is more reliable. That is the biggest error source we see on customer sites. A meter built for 2 slpm air will not read 50 g/h of methanol correctly without a fluid-specific calibration. Silver Instruments can match the calibration to your actual fluid, including solvents, fuels, and light oils.
Outputs, Certification, and Installation Data
Most micro-flow thermal mass flow meters in this class use a
Silver Instruments Recommended Configuration for Micro-Flow Tasks
For a gas blending skid in Southeast Asia, we usually recommend an inline thermal dispersion meter with 316L body, 0.5 to 20 slpm range, 4-20 mA HART output, and ATEX Zone 2 certification. For a chemical dosing line in Latin America, we recommend a liquid thermal mass flow meter with 0.1 to 5 kg/h range, actual fluid calibration, and a remote display. The exact model is set after you send fluid, flow range, pressure, temperature, and pipe size. No two low flow processes have the same heat transfer condition.
Five Key Questions Before You Request a Quote
Q1: What is the lowest gas flow rate Silver Instruments can measure?
A1: The standard minimum is 0.5 sccm for air. For hydrogen, minimum detectable flow can be lower. Specify gas composition for a correct range.
Q2: Can one meter handle both liquid and gas?
A2: You can use the same transmitter style but not the same calibration. Liquid and gas require separate calibrations because heat transfer behavior is different. A dual range version is possible only with a stable process.
Q3: Does the meter need actual fluid calibration?
A3: Yes for most micro-flow liquid services. Water or air equivalent calibration is not enough for low flow solvents, fuels, or viscous chemicals. Actual fluid calibration reduces measurement uncertainty.
Q4: What certifications are available?
A4: Silver Instruments offers ATEX Zone 1 and Zone 2 versions, CE marking, and NIST traceable calibration reports. For food contact, a 316L polished body is available.
Q5: What is the typical lead time for a micro-flow thermal mass flow meter?
A5: Standard inline DN4 to DN15 meters ship in 2 to 3 weeks with air or water calibration. Fluid-specific calibration adds 1 to 2 weeks depending on the fluid and lab schedule.
For a fixed quote, send your pressure (bar), temperature (°C), pipe size (DN), and flow range to Silver Automation Instruments. Tel: +86-135-1213-1526. WhatsApp: 86-135-12131526. WeChat: +86 13512131526.