HK Instruments Siro-MOD-rH-T-A Indoor Air Quality Transmitter (0 - 50°C; 0–100 %rH)

Measurement ranges:

+ Temperature: 0...50 °C

+ Relative humidity:  0–100 %rH

Communication: RS-485 Modbus (RTU)

Accuracy:  

+ Relative humidity: ±2.2 % rH (typical at 20 °C, 30 % rH) 

+ Temperature: ±0.4 °C (typical at 20 °C) 

Measuring elements: 

+ Temperature: Integrated to CMOS 

+ Relative humidity: Thermoset polymer capacitive sensing element 

Measuring units: 

+ Relative humidity: % rH 

+ Temperature: °C 

Calibration (CO2): Automatic self-calibration, ABC LogicTM

Supply voltage: 24 VDC/VAC ±10 %

Output signal 1–4: 0...10 V (optional 2...10 V / 0...5 V, display or configuration tool required); Optional 4...20 mA

Linear to selected measurement (CO2, VOC, PM, rH or Temp) 

Operating temperature: 0...50 °C

Protection standard: IP20

Noted:

rH = Humidity sensor

T = Temperature sensor

A = mA output