Standard Dew Point Transmitter (CI-QM02/03)
Revolutionary CHANGAI-Q QCM humidity sensitive material, lower limit of
dewpoint down to -120 °Ctd, ppb level of humidity;
Application in dewpoint < -80 °Ctd:
High-purity industrial gas, clean gas;
Patented dual QCM sensors, one for humidity signal and one for pollution
signal, automatically compensate for the drift caused by pollution;
Accurate measurements up to ±2 °Ctd;
Ultra-fast response time and outstanding long-term stability;
Multi-point temperature compensation calibration;
High resistance to electrical disturbance;
IP65 protection class, providing good protection even in harsh environments;
Provides comprehensive sensor setup, data transfer, software upgrades,
and maintenance via modbus RTU (RS485) interface and powerful service
Principle: Quartz Crystal Microbalance
Measuring Range:
CI-QM02: -110~0 °Ctd
CI-QM03: -120~0 °Ctd
Temperature: -40~+100 °C
Dew Point Accuracy: (Air or Nitrogen)
+20~+-80 °CTd: ±2 °Ctd
-80~-120 °CTd: ±3 °Ctd
Temperature Accuracy:
0~+50 °C: ±0.3 °C (standard)
-40~0 °C & +50~+100 °C: ±0.5 °C (standard)
Response Time: 63% [90%], reference: 20 °C, 1bar(a), 4L/min
-80 to +30 °Ctd: 20 sec [40sec]
+30 to -70 °Ctd: 5 min [20 min]
Power: DC 10~30V, Max 1W @ DC24V
Analog Output: 4~20mA (3 wire)
Analog Resolution: 0.002mA
Analog Drift: 0.01% of span/°C
Digital Output: Max 500 Ω
Digital Output: Modbus RTU (RS485)
Connector: 5pin M12, female
Operating Temperature: -20~+70°C
Storage Temperature: -30~+80 °C
Relative Humidity: 0~95% RH
Sample Gas Flow Rate: >1L/min
Pressure: 0~5MPa(a)
Process Connection:
ISO G1/2″ thread (standard)
3/4″ – 16 UNF thread (customized)
5/8″ – 18 UNF thread (customized)
Protection Code: IP65
Housing Material: SUS304
Sensor Filter: Stainless steel mesh filter (filtration class 70 µm)
EMC: Compliant with IEC 61326-1
