CO & O2 Analyzer System ZSQ

Continuous monitoring of CO and O2 in flue gas

  • Temperature recording
  • CO concentration recording
  • CO peak count alarm
  • Japanese type approval certified

 

Data Sheet   Manuals

 

Operating principle of NDIR sensor (used in ZSQ)

Behind the sampling cell, two expansion chambers are arranged in series. When the gas in chambers is irradiated with IR, the gas expands, resulting in pressure increase. As the front chamber receives more IR than the rear chamber, there rises a pressure difference, generating a gas flow between them. Because the amount of IR absorbed in the cell and the amount of IR which reaches the chambers depends on the target gas concentration, the resulting gas flow between chambers also differs according to the target gas concentration. The mass flow sensor detects this gas flow to determine the target gas concentration.

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Item Specifications
Components CO (Non-dispersion infrared sensor), O2 (zirconia sensor)
Range CO: 0–200/500, 0–200/1000, 0–500/1000, 0–500/2000 ppm
O2: 0–25 vol%
Repeatability ±0.5% FS
Zero drift CO: ±2% FS per week
O2: ±2% FS per month
Span drift ±2% FS per week
Linearity ±1% FS
Response ≤ 90 s (for 90% response, from the analyzer inlet)
Output signal • 4–20 mA DC (linear)
(Instantaneous values, O2-corrected CO instantaneous value, O2-corrected CO moving average value per 1 hr or 4 hr)
• Contact output (peak count and alarm, auto calibration status, error, etc)
Functions Auto calibration, O2 correction, moving average value (per 1 hr or 4 hr), CO peak count and alarm, data recording (option)
Operating environment -5°C to +40°C, RH 90% or less
Power supply voltage 100 V AC, 50/60 Hz
Dimensions 600 (H) × 1550 (W) × 650 (D) mm, for indoor use
Gas conditions Temperature ≤ 800°C
Dust ≤ 100 mg/Nm3
Pressure -1 to +5, -3 to +3, -5 to +1 kPa
Components SO2: ≤ 500 ppm, NOx: ≤ 1000 ppm, CO2: ≤ 15%

Gas Analyzers