Conditions :

- New

Description :

Overview :

Get accurate, reliable mass flow control with SideTrak 840 analog mass flow meter and controller. This traditional mass flow meter:

  • Features precise primary standard calibration to measure any gas withlow pressure drop
  • Accurately measures oxygen, mixtures, toxics, corrosives,combustibles
  • Is widely used in process control, leak detection and gas distribution

The 840 flow meter has proven to be one of the worlds most dependable flow controllers for over 30 years.

Product Benefits

  • Ideal for general industry applications
  • Large straight capillary sensor tube is cleanable with needle and provides low pressure drop
  • Mass flow rates up to500 slpm (nlpm), higher upon request
  • Pressure drop 30 psi (2.1 bar), pressure drop of 4.5 psid (310 mBard) available with MicroTrak 101
  • Primary Standard Calibration & NIST traceability
  • Available in wide variety of enclosures, process connections, input/output options and control electronics
  • Proprietary frictionless-hovering direct-acting control/shut-off valve


  • Allgases including toxics and corrosives
  • Accuracy: +/- 1% of reading
  • Repeatability: +/- 0.5% of full scale
  • Mass flow ranges from 0 to 10 sccm to 0-500 slpm (nlpm)
  • Higher and lower flow ranges available
  • Pressure up to 500 psig (34.5 barg)
  • Gas/ambient temperature: 32F to 176F (0 to 80C)

View All Specs

  • Response time: 300 millisecondtime constant; 2 seconds (typical) to within 2% of final value over 20 to 100% of Full Scale
  • 15VDC power supply
  • Seals: Viton, Neoprene, Kalrez, Teflon
  • 316 stainless-steel construction
  • Analog signals included: 4-20 mA; 0-5 VDC
  • CE approved

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    $89.95 USD

Tags: SIERRA, INSTRUMENTS, SIDE, TRAK, MASS, FLOW, CONTROLLER, MODEL, 840-L-1-V1, , Sierra Instruments, 840-L-1-V1, , 840-L-1-V1,