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Zirconia High Temperature Humidity Analyzer ZR22G, ZR402G
Separate Type Zirconia High Temeperature Humidity Analyzer
Models ZR22G, ZR402G


Separate Type zirconia High Temeperature Humidity Analyzer  Model
Regulatory Compliance

The ZR22G/ZR402G Separate Type Zirconia High Temperature Humidity Analyzer does not require any sampling system. The analyzer continuously measures the humidity of high temperature air and is typically used in steam and electric dryers. It is ideal for monitoring and controlling the humidity in dryers and humidifiers of various industries, helping improve their productivities.

The ZR402G is equipped with an LCD touch panel which has various setting displays, a calibration display, humidity 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 a self-test. An automatic calibration unit is available for fully automated calibration.


   Bulletin for ZR22G, ZR402G 

   General Specification for ZR22G, ZR402G 

   User's Manual for ZR22G, ZR402G 
* The separate type converter ZR402G incorporates a LCD touch-screen for ease of operation.
* The built-in heater assembly of the probe can be replaced on site, reducing maintenance costs.
* The probe uses a long-life, high-reliability Zirconia sensor.
* Remote maintenance using digital communications (HART) reduces maintenance costs.
   
  Note: HART is a registered trademark of HART Communication Foundation.
Measurement object Water vapor (in vol%) in mixed gases (air and water vapor)
Measurement system Zirconia system
Output signal 4 to 20 mA DC, two points (maximum load resistance 550Ω)
Measurement range 0 to 100 vol% H2O or 0 to 1.000kg/kg
Digital communication (HART) 250 to 550Ω, depending on number of field devices connected to the loop (multi-drop mode)
Sample gas pressure - 5 to + 20 kPa 
Sample gas temperature 0 to 700 degC (Probe only)
Probe length 0.4, 0.7, 1.0, 1.5, 2.0, 2.5, 3.0 m
Contact output Four points (one is fail-safe, normally open)
Contact input Two points
Analog input One point
Calibration Method; zero/span calibration
Calibration mode; 
automatic, semi-automatic and manual (All are operated interactively with an LCD touchscreen).
Construction of detector Non-explosion proof. Equivalent to NEMA4X/IP66
Construction of converter Outdoor installation, NEMA4X/IP66 or equivalent
Ambient temperature Probe: -10 deg C to 150 degC; converter: -20 deg C to 55 deg C
Power supply 85 to 264 V AC; 45 to 66 Hz
Repeatability ±1 vol%H2O (sample gas pressure within ±0.49 kPa
Linearity ±2 vol%H2O (sample gas pressure 2 kPa or less)
Drift ±3 vol%H2O/month (both zero and span)
Response time 90% response within 5 sec
  • Coloring processes in the textile industry
  • Steam curing processes for concrete products
  • Manufacturing processes in the cigarette, food, paper or pulp industries
  • Drying processes in various manufacturing of building materials, lumber, plasterboard, food or the like
  • Humidifying processes in various manufacturing of food or the like




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