Horiba PG-344CN Monitoring of N2O, CH4 , CO2

In the realm of industry, the emphasis on minimizing environmental impact extends beyond just cutting down CO2 emissions. It also involves curbing the release of other potent greenhouse gases like N2O and CH4, boasting a GWP* that’s 298 times and 25 times higher than that of CO2.

Gas Analyzer on the Go – Suitable for on-site and laboratory applications – Simultaneously measures four components: N2O, CH4, CO2, and O2

Note: Includes Electronic Cooler Unit PS 300

If the sampled gas contains moisture surpassing the saturation point at 40 degrees Celsius, or if you’re engaged in continuous measurement (lasting for 5 days or fewer), it’s necessary to incorporate an electronic cooler before the analyzer unit. This electronic cooler unit is versatile and can handle SO2 measurement through a three-step cooldown process as well.


PG344CN brochure


Sewage Treatment Facility
– Sludge incineration:
High-temperature cyclone, exhaust gas
– Wastewater treatment:
Raw water tank, sludge storage tank
Chemical Plants
– Nitric acid production with ammonia
– Adipic acid production
Incineration Facilities at
Cleaning Plants, Industrial
Waste Treatment Plants
– Fluidized bed incineration
R&D Departments
– Catalyst, combustion testing
and agriculture
– Various research applications


    Specifications of Portable Gas Analyzer PG-300 Series for Carbon Neutral
  Model   PG-344   PG-350
  Components   N2O / CH4 / CO2 / O2   NOx / N2O / CH4 / CO2 / O2
      NOx Cross-Modulation Chemiluminescence Detection Method
  Measurement Principle N2O・CH4   Cross-Modulation Non-Dispersive Infrared Absorption (NDIR)
  CO2 Non-Dispersive Infrared Absorption (NDIR)    
      O2 Paramagnetic Method (Dumbbell type), Zirconia Method, or Galvanic Method
      NOx A range: 0-25/50/100/250/500/1000/2500 ppm    
      B range: 0-50/100/250/500/1000/2500/5000 ppm    
      N2O C range: 0-100/200/500/1000 ppm    
      D range: 0-500/1000/2000/5000 ppm    
  Measurement Range CH4 C range: 0-200/500/1000/2000 ppm    
      D range: 0-500/1000/2000/5000 ppm    
      CO2 0-5/10/20 vol%    
      O2 0-5/10/25 vol% (Zirconia Method, or Galvanic Method)
      0-10/25 vol%(Paramagnetic Method (Dumbbell type))
  Repeatability ±0.5% of full scale (NOx: ≥100 ppm range)    
  ±1.0% of full scale    
  Linearity ±2.0% of full scale    
  Drift ±1.0% of full scale per day    
  Response Time(Td+T90) 45 sec. or less (From sample inlet, with electrical system response time set at 10 sec.)
      Moving average can be switched between 10 and 30 seconds.
  Sample Gas Flow Rate Approx. 0.5 L/min    
  Display Measurement (3-4 digits display), range, flow rate, etc.    
  Output DC 4-20 mA (non-insulated) or DC 0-1 V (non-insulated) [Optional] / Ethernet
  Warm-up Time With 30 min. warm-up    
  Data Saving SDTM / SDHCTM memory card    
      Ambient temperature: 0 to 40°C (32°F to 104°F),  Relative humidity: Maximum 80% or less
  Installation Upper limit of N2O concentration: Less than 1 ppm,  Upper limit of CH4 concentration: Less than 2 ppm
  Environment Please exhaust sampling gas sufficiently far from the equipment to avoid increase the concentration of N2O and CH4
      in the operating environment.    
  Power Supply, AC 100 V – 240 V, 50/60 Hz    
  Power Consumption Approx. 160 VA in a steady state, maximum 220 VA    
  Dimensions, Weight 300(W) x 520(D) x 265(H) mm, Approx. 15 kg    
  Environmental Rating IP42 (Optionally available)    
      Temperature: Ambient temperature,  Moisture: Below the ambient temperature saturation
  Sample Gas Conditions Dust: Less than 0.1 g/Nm3 ,  Pressure: ±0.98 kPa    
      No corrosive gases, gases that react with the measured gas to be present.


SD and SDHC is a trademark of SD-3C, LLC.


Environmental Protection, Wastewater




CH4 – Methane, CO2 – Carbon Dioxide, N2O – Nitrous oxide



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