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Ambient THC monitor

Ambient THC monitor

Ambient THC monitor

The APHA-370 continuously monitors atmospheric THC, NMHC, and CH4 concentrations using a cross-flow modulated selective combustion type method combined with a hydrogen ion detection method. The APHA-370 employs an independent, internal dry-method sampling device to achieve the highest levels of sensitivity and accuracy.


  • A flame ionization detector with selective combustion simultaneously measures THC, NMHC, and CH4.
  • Single detector eliminates zero drift; Low range: 0-5 ppmC F.S.
  • Integrates relative sensitivity correction for CH4 and NMHC.
  • Integrates a reference and combustion air generator, NMHC cutter, and sample pump.
  • Requires H2 as fuel gas for the FID.

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