YOKOGAWA ZR22/ZR402G Single Channel Oxygen Analyzer System

Models: ZR22G, ZR22S, ZR402G, ZR22P, ZR22R, ZR22V, AC1, MC1, M1233SR, IAC-24, WZ-H, M1234SE-A, M1200DB-06

Yokogawa’s zirconia oxygen analyzers are used for combustion monitoring and control in a wide variety of applications and help industries to make considerable achievements in energy saving. The applications range from energy-consuming industries, such as iron and steel, electric power, oil and petrochemical, ceramics, pulp and paper, food, and textiles, to various combustion facilities, such as incinerators and small- and medium sized boilers. Combustion monitoring and control using the analyzer also contribute to a lowering of CO2, SOx, and NOx emissions by allowing for more complete combustion, thus preventing global warming and air pollution.

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The ZR402G converter is equipped with an LCD touch screen which has various setting displays, a calibration display, oxygen concentration trend display, with easier operation and improvement of display functions. The converter is equipped with various standard functions such as measurement and calculation as well as maintenance functions including self-test. The ZR22G separate-type detector uses a high-reliability zirconia sensor, and its heater assembly can be replaced on site. The detector is mounted, for example, on the wall of a flue and can measure the gases directly. The ZR22S separate-type detector for explosion-proof applications is also available.

Measurement objectOxygen concentration in combustion exhaust gas and mixed gas
Measurement systemZirconium oxide sensor
Measurement range0.01 to 100 vol% O2
Output signal4 to 20 mA DC, two points (ZR402G) (maximum load resistance 550Ω)
Setting rangeAny setting in the range of 0 – 5 vol%O2 to 0 – 100 vol%O2 (in 1 vol% O2), or partial range
Digital communication (HART)250 to 550Ω, depending on number of field devices connected to the loop (multi-drop mode)
Sample gas pressure-5 to +250 kPa (Pressure compensation option necessary over +5 kPa)
Sample gas temperature0 to 700℃ (Probe only)
700 to 1871℃ (with 0.15m probe with JIS 5K 32 FF flange and ZR22P High Temperature Probe Adapter)
Probe length0.15, 0.4, 0.7, 1.0, 1.5, 2.0, 2.5, 3.0, 3.6, 4.2, 4.8, 5.4 m
Contact outputFour points (one is fail-safe, normally open)
Contact inputTwo points
CalibrationMethod; zero/span calibration
Calibration mode; automatic, semi-automatic and manual (with an LCD touchscreen)
Construction of detector (ZR22G)Heater and thermocouple replaceable construction.
Non-explosion-proof. Equivalent to NEMA4X/IP66
Construction of converter (ZR402G)Non-explosion-proof, outdoor installation, equivalent to NEMA4X/IP66
Ambient TemperatureProbe (ZR22G): -20 to 150℃
Converter (ZR402G): -20 to 55℃)
Reference Gas SystemInstrument Air (preferred): 50 kPa (200 kPa with check valve) + the pressure inside the furnace; Approx. 1 Nl/min consumption

Natural convection

Power supply85 to 264 V AC; 45 to 66 Hz