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General Purpose Flowmeters

    Thermal Flow Meters Designed for Gas Flow Measurement

    Whether measuring gas flows in a laboratory or manufacturing setting, TSI thermal mass flow meters provide accurate results with multiple data output options. TSI flow meters incorporate a proprietary platinum film sensor designed for measuring gas flows. This enables their use in applications that demand fast response and high accuracy over a wide flow range.

    Our flow meters have turn-down ratios greater than 1000:1, due to our thermal flow sensing technology and extensive gas calibration process. The TSI 4000 Series was designed for ultra-low pressure loss to minimize minimize flow circuit back pressure and its impact on the system.

    TSI air mass flow sensors are specified as 2% of reading. One TSI mass flow sensor covers the same range as 3% (or more) full scale devices, with better accuracy at most points.

    The four millisecond response time of the TSI mass air and gas mass sensor is ideal for closed-loop control systems and integrated volume measurements, and it ensures accuracy in fluctuation flows. 

    Features and Benefits

    • Accuracy of two percent of reading (not full scale)
    • High turndown ratio
    • Multi-gas, user-selectable
    • 4 ms response to changes in flow
    • Ultra-low pressure drop
    • RS 232 interface for digital outputs and configurable device options
    • Voltage output of flow rate
    • Measure flow rate, temperature, and pressure (display unit only) 
      in one instrument
    • Temperature and pressure compensation are built-in
    • Calibration certificate is NIST-traceable and included with purchase


    • Laboratory
    • R&D
    • Product development
    • Quality assurance
    • Product testing
    • Metrology
    • Medical and hospital
    • Environmental
    • OEM




    Purchase any one of our general purpose flowmeters with the guarantee that you can return it for a full refund if not entirely happy with its performance.

    Need Help Finding a Flow Meter Product?

    1. 1 What gas type are you trying to measure?
    2. 2 What flow range are you looking for?
    3. 3 What is the end configuration you need?
    4. 4 Do you want to display the values?
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