Compact NDIR Gas Analyzer System

Simultaneous and continuous measurement of up to 5
components among: NOx, SO2, CO, CO2, CH4, and O2

Suited for monitoring of flue gas, combustion gas, biogas, etc.

  • Continuous measurement for 5 days max.
  • Separatable structure
  • A variety of functions: auto calibration, O2-corrected output, averaging, alarm, etc.
  • Easy-to-see LCD
    You can check the concentration changes of all components at a glance
  • Easy-to-use interface
  • You can select a paramagnetic O2 sensor or a galvanic O2 sensor


 Data Sheet   Catalog


Instruction manual   RS-232C
Service manual





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Principle NOX, SO2, CO, CO2, CH4: Non dispersive infrared sensor
O2: paramagnetic sensor or galvanic sensor
Components 1 component: NOX, SO2, CO, CO2, CH4
2 components: NOX+SO2, CO2 + CO, CH4 + CO, CO2 + CH4, NOX + CO
3 components: NOX + SO2 + CO, NOX + SO2 + CO2, NOX + CO2 + CO,
SO2 + CO2 + CO, CH4 + CO2 + CO
4 components: NOX + SO2 + CO + CO2
O2 measurement can be added to above all.
Range NOX: 0–500 ppm…5000 ppm
SO2: 0–500 ppm…1%
CO: 0–200 ppm…100%
CO2: 0–200 ppm…100%
CH4: 0–1000 ppm…100%
O2: 0–5%…25%
No. of ranges 3 (Maximum range ratio 1 : 5)
Repeatability ±0.5% FS
Zero drift ≤ ±1.0% FS per day
Span drift ≤ ±1.0% FS per day
Linearity ±2.0% FS
Response time ≤ 50 s (for 90% response)
O2 measurement with galvanic sensor and SO2 measurement: ≤ 3 min
Output signal 4–20 mA DC (linear) or 0–1 V DC (linear), up to 8 points, non-insulation
(instantaneous value, O2-corrected instantaneous value, O2-corrected average value)
Display backlit LCD, English or Japanese
Functions Auto calibration, O2 correction, averaging, output signal hold, automatic display off
Communication RS-232C (Modbus protocol)
Operating environment -5°C to +40°C, RH 90% or less
Power supply voltage 100–115 V AC or 200–240 V AC, 50/60 Hz
Power consumption Analyzer unit: approx. 150 VA
Sampling unit: approx. 250 VA
Dimensions and weight Analyzer unit: 365 (W) x 211 (H) x 514 (D) mm, approx. 12 kg
Sampling unit: 365 (W) x 377 (H) x 514 (D) mm, approx. 18 kg
Gas conditions Temperature 0–50°C at inlet
Flow rate 0.5 L/min ±0.2 L/min per optical system
Dust ≤ 50 mg/Nm3
Pressure ≤ 3 kPa (gas outlet should be open to the atmospheric air)
Mist Unallowable
Corrosive gas HCl: ≤ 10 ppm

Note: this product is non-explosion-proof. The utmost caution must be exercised when handling explosive gas or hazardous gas.

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