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TM500™ Flow Meter

The Sierra TM500 promises precision, speed, and the field flexibility you need to adjust gas mixes and configure meter settings to maintain optimum process efficiency. Designed for the most demanding industrial processes in facilities management, chemical plants, gas refineries, and petrochemical production, Sierra flow measurement instruments are built to last and meet your application, budget, and delivery needs.

The TM500 makes you smarter and your processes more reliably efficient. And we’re always here if you need us—Sierra’s promise to customers for 50 years

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  • Accuracy
    • +/- 1.0% of reading plus +/- 0.2% of full-scale – Air, Nitrogen
    • +/- 1.5% of reading plus +/- 0.5% of full-scale – All other gases
  • Repeatability +/- 0.2% of full scale
  • Direct measurement of gas mass flow / No volume to mass calculations
  • DigiSense robust sensor design
  • Welded, 316 SS sensor
  • Insertion, Inline, and Remote styles
  • Rotatable enclosure: allows ±180 degree display orientation
  • AC and DC
  • Velocity Range: 0 to 45,000 sfpm
  • Wide measurement range: up to 1000:1 turndown; 100:1 typical
  • Negligible pressure drop
  • Two 4-20mA outputs for flow rate and temperature
  • Measure gas flow rate in scfm, mcfd, kg/h, and more
  • Low-end sensitivity (0-500 sfpm) for leak detection and other low-flow applications
  • Communication options: HART or Modbus RTU (RS485)
  • FM/FMc, ATEX, IECEx, and UKEX approvals
  • NEMA 4X and CE Mark


  • Microprocessor based, field programmable electronics
  • Menu of field selectable gas compositions with Gas-Mix
  • Free TM500-View software available / USB port connects to a PC
  • Calibration Validation with TM-Cal
  • NIST-traceable calibration
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