Product Brand

MESA Definer Series

The Definer Series of Flow Calibrators allows the user to verify gas flow rates in the lab or in the field. Using positive displacement technology, the Definer gives an immediate indication of actual volumetric gas flow rate- accurately and independently of gas type.

Definer 220

  • 1% Standardised Accuracy, 0.75% Volumetric Accuracy
  • ISO 17025 & NVLAP accredited
  • Lightweight and impact resistant
  • User Selectable flow units and time intervals
  • Proven DryCal Technology


  • Low: 5-500ccm
  • Medium: 50-5,000ccm
  • High: 300-30,000ccm
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Rebecca Stanley

Hi there, I'm Bec.
I've been with TES for three years and I look after our AQMS and indoor/handheld equipment sales. I also co-ordinate our rental stock. If there's something I can help you with, please call me at the Sydney office on 02 9526 8199 or send me a message!