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CalTrak 800 for Gas Flow Calibration

CalTrak 800 Gas Flow Calibrator by Sierra Instruments

Highest Accuracy Gas Flow Calibration Primary Standard

Sierra Instruments has the world’s most accurate flow standard for your lab with the CalTrak® 800.  The CalTrak 800 can be used for calibration and verification of:

  • Mass flow meters
  • Controllers
  • Variable area flow meters

It is also used for the precision in-situ calibration of industrial flow meters and controllers, the 800 is ideal for customers who require the very best flow meter accuracy to do their job right.  You can avoid the cost and downtime delay of sending out instruments to be calibrated with the CalTrak 800, perfect for owners and users of many flow instruments (more than 25) that require calibration/verification one or more times a year.

Every CalTrak 800 is manufactured to ISO 17025 standards at a NVLAP-accredited lab using assets that are directly traceable to NIST.


  • Highest accuracy of up to ± 0.15% of reading gas mass flow rate
  • Broad flow range from 0.5 sccm up to 100 slpm
  • Quick, easy to use, automatic data capture 
  • Portable and battery operated
  • Results directly traceable to NIST

Specifications & Downloads
Video Demos

Benefits of the CalTrak 800

  • The performance of only the highest level metrology laboratories can now be yours
  • Highest accuracy primary standard for labs & industry (compare at ± 0.15% of reading)
  • Innovative - 100:1 turndown ratio; widest flow range of all CalTrak systems
  • Proven dimensionally-based primary standard accuracy backed by a rigorous uncertainty analysis
  • Manufactured to ISO 17025 Standards at a NVLAP accredited lab
  • Collected data is directly traceable to NIST
  • Surpasses pressure-based secondary methods
  • Everything you need to do your own flow calibration
  • Less expensive than most popular secondary standards
  • Field portable and battery powered
  • Suitable for most non-corrosive gases
  • Accurate and reliable gas flow readings independent of gas species measured
  • Reading options: Single, continuous or burst, with user-selectable averaging from 1 to 100
  • Run automatically in continuous mode or operate manually (one flow reading at a time)
  • Take up to up to 100 measurements in an average continuous mode sequence
  • Easy to use, large LCD readout screen and 23-button keypad
  • Generates calibration certificate easily
  • Communicate via RS-232, USB, and use free CalSoft® software included
  • CalSoft® software automatically acquires flow data for easy data export
  • Kit consists of a base and three interchangeable flow cells
  • Entire kit is packaged in a Pelican case for safe transport
  • Each flow cell has a specific flow range
  • Each flow cell is easily changed (no tools needed) within seconds
  • Flow cells can be purchased separately; Get started with one, add more later
  • Cover a broad set of instrument flow ranges at your facility
  • No Mercury or other hazardous materials
  • Low maintenance  

Industries suitable for use

  • Analytical
  • Life Sciences & Health
  • Custody Trasnfer Billing
  • Biopharmaceutical
  • Life Science
  • Medical Devices

CalTrak 800 Specifications

To view all the specifications for the CalTrak 500 you can download the data sheet here



View the video by Sierra on Primary Standard Gas Flow Calibration Systems

Flow Type: Gas Flow Meters