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Flow Meters

Thermal Mass 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 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 2% 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

Model Selection Guide

Flow Meter Model  Range Connection Tube Size Calibration
4040* 0-300 L/min 22 mm ISO Air, O2, N2
4045* 0-300 L/min 3/4" tube Air, O2, N2
40401 0-300 L/min 22mm ISO Air
4043* 0-200 L/min 1/2" tube Air, O2, N2
41401 0.01-20 L/min 1/4" tube Air
4140* 0.01-20 L/min 1/4" tube Air, O2, N2
4143 0.01-20 L/min 3/8" tube Air, O2, N2
41403 0.01-20 L/min 1/4" tube N2O, Air, O2, N2
41433 0.01-20 L/min 3/8" tube N2O, Air, O2, N2

* Top Selling Flow Meter Models

Applications

Researchers, engineers, designers, and scientists use TSI digital flow meters in applications such as:

  • Laboratory
  • Research & development (R&D)
  • Product development
  • Quality assurance
  • Product testing
  • Metrology
  • Medical and hospital
  • Environmental
  • OEM
  • Manufacturing and quality assurance
  • Field Service

Mass Flow Meter 4040

$995.00 USD

Range: 0-300 L/min. Calibration: Air, O2, N2. Connection: 22 mm ISO.

Mass Flow Meter 40401

$965.00 USD

Range: 0-300 L/min. Calibration: Air only. Connection: 22 mm ISO.

Mass Flow Meter 4043

$995.00 USD

Range: 0-200 L/min. Calibration: Air, O2, N2. Connections: 1/2 inch tube.

Mass Flow Meter 4045

$995.00 USD

Range: 0-300 L/min. Calibration: Air, O2, N2. Connections: 3/4 inch tube.

Mass Flow Meter 4140

$925.00 USD

Range: 0.01-20 L/min. Calibration: Air, O2, N2. Connections: 1/4 inch tube.

Mass Flow Meter 41401

$865.00 USD

Range: 0.01-20 L/min. Calibration: Air. Connections: 1/4 inch tube.

Mass Flow Meter 41403

$1005.00 USD

Range: 0.01-20 L/min. Calibration: N2O, Air, O2, N2. Connections: 1/4 inch tube.

Mass Flow Meter 4143

$925.00 USD

Range: 0.01-20 L/min. Calibration: Air, O2, N2. Connections: 3/8 inch tube.

Mass Flow Meter 41433

$1005.00 USD

Range: 0.01-20 L/min. Calibration: N2O, Air, O2, N2. Connections: 3/8 inch tube.