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Humidity/Temperature Transmitter

HX400 Series

Humidity/Temperature Transmitter | HX400 Series

Humidity/Temperature Transmitter

See All Models Below

1 year warranty CE
  • 4 to 20 mA for Both RH and Temperature
  • Two Points Field Calibration
  • Models with Built-In Display Indicate Humidity and Temperature
  • Field Configurable Parameters
  • Two Isolated SSR Output
Relative Humidity Measurement Instruments - View related products


The HX400 Series transmitters provide remote and on-site monitoring of relative humidity and temperature. Each parameter is transmitted as a 4 to 20 mA signal to remote receivers. The HX400 is a programmable 2-wire field mounted humidity/ temperature transmitter for use in environmental air monitoring and system. Its state-of the art design combines digital capacitor humidity/temperature chip and microprocessor-based linearization with temperature drift compensation technology offering proportional, linear, and highly accurate dual 4 to 20 mA output current in a variety of applications. The HX400 integrates functions of transmitter, indicator and alarm outputs in one unit. All directly measured and computed parameters are configured via front 3 pushbutton without personal computer involved. Dual 3-digit 7-segments LED display module indicates the values of the measured parameters in measuring mode or prompting the programming instructions during setup mode and calibration mode. The current output models enable placing of the transmitter at a remote location virtually any distance away from the measuring device. The HX400 models feature built-in dual displays that indicate both humidity and temperature simultaneously.

Loop Power: 12 to 32 Vdc; dual 4 to 20 mA loop current; reverse polarity protected (Vloop = 24 Vdc, Tamb = 23 ±2°C, Rload = 250 Ω)
Dual Isolated Solid State Relay Output: For output #1 and output #2; 15 mA maximum, 40 Vdc maximum
Accuracy and Range of Output Current: ±0.02 mA; 4 to 20 mA (both channels)
Accuracy @ 23°C and Scaleable Measurement Range: Without field calibration
Relative Humidity (RH): ±2%; 10 to 90%
Temperature: ±0.5°C (0.9°F)
Dew Point: ±2°C (3.6°F)
Wet Bulb Temperature: ±2°C (3.6°F), -20 to 80°C (-4 to 176°F)
Repeatability of Relative Humidity and Temperature: ±1% RH, ±0.1°C
Display Resolution: 0.1% RH, 0.1°C (temperature < 100°C)
Response: 10 seconds (relative humidity); 30 seconds maximum (temperature)
Filtering Ability of Sensor Cap: Stainless steel wire mesh; 0.05 mm
Type of Fluid: Air and neutral gases
Configuration Operation: Front 3 pushbutton with dual high bright 3-digit LED module
Working Temperature:
    Electronics Device: -20 to 70°C (-4 to 158°F)
    Sensing Probe: -40 to 100°C (-40 to 212°F)
Dual Miniature Loop-Powered Indicators: Dual 3-digits LED (green for humidity; red for temperature)
Reading Rate: 1 update per second
Display Accuracy
    Relative Humidity: ±2% RH
    Temperature: ±0.5°C (1°F)
Display Resolution:
    Relative Humidity: 0.1% RH
    Temperature: 0.1°C (0.2°F)
Housing Material: POM (sensing probe); polycarbonate (electronics device)
Protection: NEMA 4 (IP65) (electronic device); IP40 (sensing probe)
Dimensions: 110 W x 80 L x 56 mm D (4.3 x 3.2 x 2.2")
Weight: 250 g (8.8 oz)
Probe Dimensions:
    Wall Mount Unit: L = 73 mm (2.87"), D = 15.5 mm (0.61")
    Remote Mount Unit: L = 100 mm (3.94"), D = 15.5 mm (0.61"), 100 cm (39.4") cable, 5.3 (0.21") diameter cable
    Duct Mount Unit: L = 200 mm (7.87"), D = 15.5 mm (0.61")
Place Order(Specify Model Number)
Part Number/ Desc.
HX401W Star
Availability: 13 weeks
Wall mount relative humidity transmitter
HX401R Star
Availability: 1 week
Remote probe relative humidity transmitter
HX401D Star
Availability: 13 weeks
Duct mount relative humidity transmitter
HX402W Star
Availability: 1 week
Wall mount RH and temperature transmitter
HX402R Star
Availability: 1 week
Remote probe RH and temperature transmitter
HX402D Star
Availability: 1 week
Duct mount RH and temperature transmitter
All dollar amounts on this site are shown in Canadian currency. Note: Comes complete with operator’s manual.
Ordering Example: (1) HX401W Wall Mount Temperature & Humidity Transmitter, CAD645.00