GENERAL DESCRIPTION

The EWHS 280 humidity sensor is a probe designed to be connected to a humidity measuring device.  Output signal is a current signal (4...20 mA). 

TECHNICAL DATA

Protection rating:  IP54

Mounting: use the clip supplied together with the sensor

Electrical connections: PVC twin wire

Connection cable:  1.5 m (4.9') or 3.0 m (9.8')

Dimensions (mm): 103x25

Power supply: 9…28 Vcc

Power input:  20mA max

Ambient temperature:  -10…+60°C (14° to 140°F)

Ambient humidity:  0…100% RH

Humidity sensor:  resistive

Humidity measurement range:  15…90% RH

Output current of humidity measurement:   4 (20%)…20mA (100%)

Response time under constant conditions (63%) at 23°C (73.4°F):   60 seconds

Saturation recovery time: 360 seconds

Storage temperature:      -20…+70°C (-4 to 158°F)

Number of connection wires: 2 (dark blue: power supply; brown:  output)

Maximum load:  250 Ohm

Humidity measurement accuracy (23 °C/73.4°F) :

±5% RH (15..90% RH) (es. 40% RH --> min 35% RH ... max 45% RH)

Air filter: wire mesh

Reverse polarity protection:   by diode

Max. air speed: 20m/s