Flue Gas Analyzer System ZSU-7

Continuous monitoring of 7 components:
NOx, SO2, CO, CO2, O2, HCl, and dust

  • Ideal for environmental monitoring
  • Space-saving design
  • All the necessary equipment are housed in a cabinet of 1215 (W) x 700 (D) x 1780 (H) mm size
  • Less electrical work: signal and power terminals are in one place
  • Maintenance-free HCl measurement
  • Japanese type approval (NOx, SO2, CO, O2)
  • Saves power by 40% compared to conventional models


Data Sheet




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Item Specifications
Ranges NOx: 0–50 ppm…5000 ppm
SO2: 0–50 ppm…5000 ppm
CO: 0–50 ppm…5000 ppm
CO2: 0–10% or 0–20%
O2: 0–10% or 0–25%
Principle Non-dispersive infrared sensor(double beam)
Zirconia sensor for O2 measurement
Repeatability ±0.5% FS
Zero drift ≤ 1.0 % FS per week
≤ ±2.0% FS per week for the range below 200 ppm
≤ ±2.0% FS per month for O2 measurement
Span drift ≤ ±2.0% FS per week
O2 measurement: ≤ ±2.0% FS per month
Gas sampling amount Approx. 2 L/min
Response speed ≤ 120 s for 90% response from inlet
≤ 240 s in SO2 measurement
Output signal 4–20 mA DC
Auto calibration Zero and span (calibration cycle configurable)
Display Backlit LCD
Instantaneous value, O2-corrected instantaneous value, O2-corrected average value, O2average, CO peak count, parameter setpoint
English or Japanese

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Item Specifications
Dimensions Indoor type: 1215 (W) x 700 (D) x 1780 (H) mm
Power supply voltage 100 V AC, 50/60 Hz, approx. 1200 VA
Weight Approx. 500 kg
Output signal 4–20 mA DC (insulated)
External contact output SPST no-voltage contact, up to 8 points
(Under maintenance, under auto-calibration, analyzing section error, CO peak count alarm, etc.)
External contact input No-voltage contact (auto-calibration start, average value reset, measurement stop)
Computing unit Calculates moving average and O2 corrected gas concentration, in dust measurement
Recorder (option) Inkjet or paperless
Ambient temperature -5 to +40°C, -10 to +40°C, or -15 to +40°C
Gas conditions
Temperature ≤ 450°C
Dust ≤ 100 mg/Nm3
Pressure -5 to +5 kPa
Components SO2: ≤ 500 ppm, NOX: ≤ 1000 ppm
CO2: 0–15%, CO: 0–2000 ppm,
O2: 1–21%, HCL: ≤ 1000 ppm

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Item Specifications
Principle Electric heating system (with 316 Stainless steel wire mesh filter, 40 µm)
Gas temperature & material Standard: 60–800°C (316 SS)
Optional: 1000°C (titanium), 1300°C (Sic)
Mounting JIS 5K 65A flange
Power supply voltage 100 V AC, 50/60 Hz, Heated tube: approx. 720 VA per 20 m
Gas inlet tube Heated tube (30 m max.) or φ10/φ8 mm Teflon tube

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Item Specifications
Target gas HCl, NH3, O2, HCl + H2O, NH3 + H2O, CO, CO2, CH4, CO + O2, CO + CO2
Principle Non-dispersive infrared (NDIR)
Method Cross-stack
Laser class CLASS 1M
Measurement range 10 ppm·m to 5000 ppm·m
Measurement light length 0.5–10 m (diameter of smokestack)
Repeatability ±1.0% FS
Zero drift ±2.0% FS/6 months
Response speed (90% response) ≤ 5 s
Gas temperature ≤ 1200°C
Mounting JIS10K 50A or 100A flange
Air purge Instrument air, pressure ±10 kPa, flow rate 20 L/min or more
Signal cable length 100 m max. between receiver unit and control unit
Display LCD (instantaneous value, converted instantaneous value, converted moving average value, etc.)

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Item Specifications
Measuring object Dust concentration
Principle Electrostatic induction
Range 0.01 to 1000 mg/m3
Probe length ≤ 1500 mm
Signal cable length ≤ 1000 m between detector and transmitter
Display LCD (bar graph, numeric values, trend display)