APHA-370 THC Analyser (Total Hydrocarbons)

Our measuring device APHA-370 is a continuously working analyzer for the determination of THC, CH4 and non-CH4 in the ambient air.

Further applications exist in various areas of process and trace analysis. The Horiba measuring device APHA-370 is a flame ionization detector which uses the “cross flow modulation principle”. Sample gas and reference gas are alternately supplied to the sample cell. The measuring gas in which the THC concentration was eliminated serves as reference gas. This guarantees low-maintenance operation and extremely stable measurements. The measuring device is almost interference-free and has an internal sample gas pump. The burner air is generated from the ambient air and fed to the detector.


• Selective combustion flame ionization detector simultaneously measures THC, NMHC and CH4.
• Single detector eliminates zero drift; Low Range: 0-5ppmC 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 the fuel gas for the FID.


  • measuring principle: Flame Ionization Detector (FID)
  • applications : THC measurement in the ambient air
  • measuring range : • Default : 0-5/ 10/ 25/ 50ppm

Can be controlled manually, automatically or externally
Optional: measuring range extension 0-100 ppm.

• maximum turndown ratio = 1:10

  • detection limit : 0.022ppm (3δ)
  • reproducibility : ±1.0% of full scale range
  • linearity : ±1.0% of full scale range
  • flow : approx. 0.5 l/min
  • Response time (T90) : < 60 sec. (smallest measuring range)
  • display values : Concentration in ppm (ppb) or mg (µg)/m3
  • compensation : pressure and temperature
  • Languages:  German, English, French, Japanese
  • interfaces : RS-232C (Gesytec / HORIBA protocol)

options :

• Ethernet interface

• Analog output 0-1/10 V or 0(4) – 20 mA

• Long term data storage

• Calibration Units

• Further options on request

  • ambient temperature : 0-40°C
  • perfomance : 240 VAC, 50 Hz, approx. 170 VA
  • dimensions : 430(W) x 550(D) x 221(H) mm (5U)
  • Housing : 19″ rack with telescopic rails
  • weight : Approx. 33 kg.

Environmental Protection




CH4 – Methane, THC


Automotive, Bio Energy, Bioprocessing, Chemical, Environmental & water treatment, Fermentations, Food & Beverages, Forensics, Laboratories, Petrochemical, Pharmaceutical & Bio Pharma, Polymers, Power Plants, Pulp & Paper, Refinery, Security, customs, fire department, drug agencies, Semi-Conductor, Steel Plants, Sterilization, Universities