Thermal Mass Flow

FS-600Thermal Gas Mass Flow Meter

The FS-600 measures the mass flow of air and compatible process gases using thermal sensing. Its local display and configurable signal options support stand-alone monitoring as well as connection to a PLC or control system.

FS-600 Thermal Gas Mass Flow Meter

Technical overview

Published configuration data

Values below describe catalog or typical configurations. The confirmed quotation and model code define the supplied specification.

Range
Configurations up to 500 L/min
Power
24 VDC
Display
Rotatable local display
Communication
RS485 option

Key characteristics

Why engineers consider FS-600

  • MEMS thermal sensing
  • Direct mass-flow reading
  • Local display
  • Multiple range options

Typical applications

Where it fits

  • 01Industrial gas monitoring
  • 02Purge gas
  • 03Laboratory utilities
  • 04Equipment integration

Selection checklist

Confirm these conditions before ordering.

Sending this information helps CurioSens verify the measurement principle, materials, range and interface.

  1. 01Process medium and composition
  2. 02Minimum, normal and maximum measuring range
  3. 03Operating and sterilization temperature
  4. 04Operating pressure and pressure peaks
  5. 05Pipe or tube size and process connection
  6. 06Required output, power supply and control interface

Engineer-reviewed FAQ

Questions about FS-600

Application answers reviewed for compatibility, selection, installation and maintenance.

What key process parameters must be provided when requesting a custom flow meter quote?+

Obtaining an exact flow instrumentation quotation requires a complete profile of your operating conditions. Essential parameters include the fluid name, full-scale flow rate range, working temperature, and line pressure. For liquid systems, fluid viscosity and conductivity determine suitability for gear, electromagnetic, or ultrasonic technology. For gas mass flow systems, gas purity and composition are critical for calibration factors. Sensor materials, such as 316L stainless steel, UPVC, or PEEK, must match chemical compatibility. Standard configurations offer 4-20mA or RS485 Modbus RTU outputs. If process conditions fall outside standard specifications, this must be confirmed for the selected configuration. Please share your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output for prompt pricing.

procurement
What is the difference between mass flow measurement and volumetric gas flow measurement?+

Gas volume changes substantially with fluctuations in process pressure and temperature, whereas mass remains constant. Thermal gas mass flow meters like the FS-600 and FS-620 utilize MEMS thermal sensing chips to directly measure molecular mass flow, outputting standardized mass or volumetric flow rates scaled to standard conditions such as 20°C and 101.325 kPa. This eliminates the added cost and potential error of installing secondary pressure and temperature sensors for compensation. Standard calibrations are performed using dry air, so multi-gas conversion factors or real-gas calibrations must be confirmed for the selected configuration. Provide your gas medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output for application verification.

comparison
What is the flow measurement range and operating pressure of the FS-600 thermal gas flow meter?+

The FS-600 utilizes advanced MEMS thermal flow sensor technology to deliver high sensitivity, rapid response (50-1000 ms), and strong anti-interference capabilities. Available standard flow ranges span 0.5-50 L/min (0.03-3 m3/h) up to 5-500 L/min (0.3-30 m3/h), with maximum measurable capacity reaching 1000 NL/min. The meter operates under working pressures up to 1.0 MPa and medium temperatures from -10°C to 55°C, featuring a 360-degree rotatable display. Measurement accuracy is +/- (2.0 + 0.2 FS)%. Since non-air gases require specific calibration factors, target gas compatibility must be confirmed for the selected configuration. Provide your gas medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output to verify sizing.

selection
What flow and analytical instrumentation solutions are available for laboratory OEM equipment?+

Medical and laboratory equipment OEMs require compact, reliable instrumentation with standardized digital communications. For gas delivery in analyzers or bioreactor sparging, the FS-600 MEMS thermal gas flow meter provides 1:100 turndown and fast response (50-1000 ms) in a compact block with a rotatable screen. Liquid reagent dosing uses the FS-910 inline ultrasonic meter for micro-flows down to 120 ml/min. Analytical sensor integration is simplified by the B Series DIN Rail transmitter, which offers 24VDC power, isolated Modbus RTU, and compact mounting inside analyzer cabinets. Custom OEM mounting interfaces must be confirmed for the selected configuration. Share your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output for OEM customization.

selection

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Application support

Send us your operating conditions.

Medium, range, pressure, temperature and connection are enough to start a technical selection.