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
   NOxCross-Modulation Chemiluminescence Detection Method
 Measurement PrincipleN2O・CH4   Cross-Modulation Non-Dispersive Infrared Absorption (NDIR)
 CO2Non-Dispersive Infrared Absorption (NDIR)  
   O2Paramagnetic Method (Dumbbell type), Zirconia Method, or Galvanic Method
   NOxA range: 0-25/50/100/250/500/1000/2500 ppm  
   B range: 0-50/100/250/500/1000/2500/5000 ppm  
   N2OC range: 0-100/200/500/1000 ppm  
   D range: 0-500/1000/2000/5000 ppm  
 Measurement RangeCH4C range: 0-200/500/1000/2000 ppm  
   D range: 0-500/1000/2000/5000 ppm  
   CO20-5/10/20 vol%  
   O20-5/10/25 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 RateApprox. 0.5 L/min  
 DisplayMeasurement (3-4 digits display), range, flow rate, etc.  
 OutputDC 4-20 mA (non-insulated) or DC 0-1 V (non-insulated)[Optional] / Ethernet
 Warm-up TimeWith 30 min. warm-up  
 Data SavingSDTM / SDHCTM memory card  
   Ambient temperature: 0 to 40°C (32°F to 104°F),  Relative humidity: Maximum 80% or less
 InstallationUpper limit of N2O concentration: Less than 1 ppm,  Upper limit of CH4 concentration: Less than 2 ppm
 EnvironmentPlease 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 ConsumptionApprox. 160 VA in a steady state, maximum 220 VA  
 Dimensions, Weight300(W) x 520(D) x 265(H) mm, Approx. 15 kg  
 Environmental RatingIP42 (Optionally available)  
   Temperature: Ambient temperature,  Moisture: Below the ambient temperature saturation
 Sample Gas ConditionsDust: 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