CalTrak XL Flow Calibrator

Sierra’s Cal=TrakTM XL is the leading high flow primary gas flow calibrator.

With increased demand for higher flows of process gas, there is a requirement for a way to validate and calibrate high flow gas meters and controllers. Cal=Trak XL meets that need with an impressive standard- ized accuracy of +/- 0.25% of reading over a flow range of 5 to 500 slpm!

Like all members of Sierra’s Cal=TrakTM family of prod- ucts, Cal=TrakTM XL is a primary standard piston prover
that operates with the press of a button--assuring you the ultimate in calibration accuracy, convenience, ease-of-use, low-maintenance, and productivity. The performance of the highest level metrology laboratories can now be a part of your own lab, at flow rates up to 500 slpm.


  • Superior Accuracy: +/- 0.25% Reading Mass Flow
  • Primary standard: Dimensionally based piston prover system
  • Range: 5 slpm to 500 slpm
  • Quality: Manufactured to ISO 17025 standard at NIST-accredited lab (NVLAP)
  • Fast: Readings in 1-60 seconds (flow dependent)
  • Easy: Operate with one button using Automatic Mode!
  • Versatile: Ideal for calibration of mass flow meters and controllers
  • Safe: No mercury or other hazardous materials
  • CE Approved