The SEM160i is a low cost single/dual channel RH and temperature transmitter for industrial and BMS/HVAC applications. The unit can be supplied in single or dual channel ( two wire (4 to 20) mA ) versions, the single channel version has a thermistor mounted in the sensor tip for direct temperature sensing by the users. A USB HID interface is provided for user configuration using USBSpeedLink configuration software, allowing the user to select signal source and range for each channel. The dual channel version has four switch set ranges for easy onsite configuration. The four ranges can be programmed individually to the customer’s requirement off site via the configuration software. Single point alignment is provided for both temperature and humidity ranges. The configuration software also provides data readings together with a basic logger function for diagnostics. Wall and duct mount versions are available.






















RH range (0 to 100) %RH RH accuracy +/- 4 %RH between (10 to 90)%RH

Temperature range (-30 to 100) °C Temperature accuracy +/- 0.5 °C between (-20 to 80)°C

Dew point range (0 to 50) °C

Delta temperature (Delta T)= Ambient temperature – dew point temperature Delta T range (0 to 50) °C

Thermistor Optional discrete thermistor to replace second (4 to 20) mA channel.

Thermistor to be read directly by user. Single channel version only.

10 K NTC, data on request.


Output type 2 wire (4 to 20) mA current loop

Output range (4.0 to 20.0) mA

Output connection Two part screw terminal

Maximum output > 20.5 mA in high burnout condition

Minimum output < 3.9 mA in low burnout condition

Accuracy (mA output /2000) or 5 uA, whichever is the greater

Loop voltage effect 0.2 uA / V

Thermal drift 1 uA / °C

Maximum output load [(Vsupply-10)/20] K Ohms (Example: 700 Ohms @ 24V)

Channel isolation 500 Vdc

Switch settings CH2 only Four switch selected ranges provided

Note CH1 = main supply channel and must be powered, CH2 acts as slave to CH1


Update time 3 Seconds

Start-up time < 10 seconds, I out < 4 mA during start up

Power Supply (10 to 30) Volts dc

Operating temperature

Electronics housing (-20 to 70) °C

Probe (-30 to 100) °C