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


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
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
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
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.)
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)