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4000 Series Analog and Digital 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.

The TSI 4000 Series inline flow meters were designed for ultra-low pressure loss to minimize flow circuit back pressure and its impact on the system. The meters include digital and analog outputs for flow rate, absolute pressure, and temperature. Volume measurements can be made through the RS232 digital interface.

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.

Use our interactive product selector to find the meter that is right for your application!

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 inch tube Air, O2, N2
40401 0-300 L/min 22mm ISO Air
4043 0-200 L/min 1/2 inch tube Air, O2, N2
41401 0.01-20 L/min 1/4 inch tube Air
4140 0.01-20 L/min 1/4 inch tube Air, O2, N2
4143 0.01-20 L/min 3/8 inch tube Air, O2, N2
41403 0.01-20 L/min 1/4 inch tube N2O, Air, O2, N2
41433 0.01-20 L/min 3/8 inch tube N2O, Air, O2, N2

 

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.

Ultra-low pressure drop

TSI flow meters are designed for ultra-low pressure loss to minimize flow circuit back pressure and its impact on the system.

High accuracy

TSI gas 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.

Fast response time

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.

Calibration and service

Looking to calibrate your TSI Flow Meter? TSI now offers worldwide service! To find out about our service, calibration, and repair options, visit our Flow Service page.

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
  • Built-in temperature and pressure compensation
  • NIST-traceable calibration certificate included with purchase

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 41433

$1155.00 USD

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

Mass Flow Meter 4143

$1075.00 USD

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

Mass Flow Meter 41403

$1155.00 USD

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

Mass Flow Meter 41401

$1025.00 USD

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

Mass Flow Meter 4140

$1075.00 USD

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

Mass Flow Meter 4045

$1145.00 USD

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

Mass Flow Meter 4043

$1145.00 USD

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

Mass Flow Meter 40401

$1095.00 USD

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

Mass Flow Meter 4040

$1145.00 USD

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

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