Humidity Sensor


The Delta Style room units are available as Humidity Only sensors or as Combination temperature and humidity sensors. They feature an optional display with a user adjustable toggle rate between humidity and temperature and can display in either °C or °F. The unit is available with the entire line of BAPI temperature sensors. If a temperature transmitter and humidity transmitter are desired, then see the “X-Combo” Unit on pages B10-11 of this section.


  • Low Profile Delta Style Enclosure with Optional Display
  • Humidity Only or Temperature/Humidity Combo
  • 2% and 3% RH Accuracies
  • Optional Communications Jack
  • User Adjustable Toggle Rate Between Temp & Humidity Display
  • Wide Selection of Temperature Sensing Elements
  • Full-range Temperature Compensation of RH Signal
  • Five Year Warranty

Call to order:


Specs & Docs



10 to 35 VDC (0 to 5 VDC or 4 to 20 mA Outputs)
15 to 40 VDC (0 to 10 VDC Output)
12 to 24 VAC (0 to 5 VDC Output)
15 to 28 VAC (0 to 10 VDC Output)

Note: If AC power is used, it must be shielded from the signal wiring

Power Consumption:

22 mA max. DC (0 to 5 VDC or 4 to 20 mA Outputs)
6 mA max DC (0 to 10 VDC Output)
0.53 VA max. AC (0 to 5 VDC Output)
0.14 VA max. AC (0 to10 VDC Output)

Sensing Elements:

Temperature – Thermistor or RTD
(See “Sensors” section for specs.)
Humidity – Capacitive Type, ±2% or ±3%RH @ 25°C (77°F), 20 to 80%RH
%RH Calibration Adjustment: ±5% POT
Wiring: 2 to 3 pair of 16 to 22 AWG*
Mounting: 2”x4” J-box or drywall mount – screws provided

Environmental Operation Range:

Temp: 32 to 122 oF (0 to 50 oC)
Humidity: 5 to 95%, non-condensing
Material & Rating: ABS Plastic , UL94 HB
Agency: RoHS and CE

*BAPI recommends that you do not run wiring for the room units in the same conduit as line voltage wiring or with wiring used to supply highly inductive loads such as motors, generators and coils.*