The IN-HWD (rev 2) wet & dry bulb humidity transmitter / Indicator is the ideal solution for a variety of humidity and temperature applications. It features two Pt100 inputs for the wet and dry bulb, two 4~20mA outputs for RH and dry bulb temperature, with no software required. Options are available for adding relay alarm outputs and/or serial port with Modbus RTU to allow easy interface with your PC, or with your existing PLC or monitoring system. The IN-HWD has been designed for ease of use, and has intuitive, scrolling text prompts that guide you step-by-step through the setup process. The front panel includes a dual, 6-digit LED display and five buttons, for simple operator interface. The IN-HWD comes factory pre-calibrated for a Pt100 RTD 0~100°C input, and is simple to recalibrate (if required) using a two-point calibration method.

• Independent Temperature and Relative Humidity Outputs.
• %RH Accurate to 1.0%.
• Temperature Accurate to 0.1%.
• Low Cost.
• Easy to Install.
• Typically used with our WDT-DW wet and dry bulb humidity tank.

Optional: The IN-HWD will connect to our MicroScan SCADA software on the RS485 Modbus comms
(requires the PLC Modbus driver for direct connection to MicroScan; otherwise connect via a Intech Micro I/O Remote Station) for logging of the humidity and temperature.

Also see install manual PDF for full specifications

Specifications.

Input 1 x wet bulb, 1 x dry bulb.
Dual 3-wire RTD Pt100 DIN (JIS option).
Power supply HV: 85~265Vac / 95~370Vdc.
LV: 15~48Vac / 10~72Vdc.
Analogue Output Temperature and humidity output. Dual 16-bit 4~20mA (fully scalable). Window
programmable over any range within the full-scale range of the controller.
Sampling rate 2.5Hz.
Resolution 0.025% full scale 16-bit.
Accuracy 0.05% of reading.
Temperature drift Typically 50ppm/°C.
Temperature units °C or °F.
Easy Setup Intuitive text prompts for easy setup.
Calibration Precalibrated for Pt100 RTD. Simple recalibration (if required) using high and low
display values.
Security Calibration and setpoint functions have independent security code access.
Setpoint functions are independently configurable, and accessible through the F2 key.

OPTIONAL
Relay Output 4x 5A Form A relays.
Serial port
Isolated RS232 or RS485.
Modes: ASCII, Modbus RTU