CalTrak SL 500-800 Flow Calibrator

Sierra Instruments, Inc. presents a new line of portable, low-maintenance, primary standard gas flow calibrators— the Cal=Trak SL-500 and Cal=Trak SL-800.

The Cal=Trak SL-500 offers an excellent accuracy of ±0.35% of reading while the Cal=Trak SL-800 offers the best accuracy of any commercially available standard: ±0.15% of reading!
The accuracy of the highest level metrology laboratories worldwide can now be a part of your lab, workshop or production floor when you do-it-yourself with Cal=Trak.


  • Superior Accuracy:
SL-800: 0.15% of reading mass flow 
  • SL-500: 0.35% of reading mass flow
  • Primary standard: Dimensionally based
  • Attractive Price: Less expensive than most popular secondary standards
  • Safe: No mercury or other hazardous materials
Quality: Manufactured to ISO 17025 Standards
Field portable: Battery powered
Fast: Readings in 1-60 seconds (flow dependent) • Easy: Push one button!
  • Range: 5 sccm up to 50 slpm
  • Versatile: Ideal for calibration of all Mass Flow Meters/Controllers
  • Hands-Free Auto Mode • Fully traceable to NIST • CE approved