EHRH Specifications

Humidity

Sensing Element

Resistance change of bulk polymer sensor

Accuracy at 77°F (25°C)

±2% RH. 30 to 95% RH including hysteresis, linearity,

and repeatability.

Temperature Effect

Less than 0.11% per ºF (0.06% per ºC)

Sensitivity

0.1% RH

Repeatability

0.5% RH

Linearity

See accuracy

Hysteresis

Less than 1%

Operating Range, Sensor & Electronics

0% to 100% RH, -20ºC to 54ºC (-4ºF to 129ºF)

Maximum Air Velocity

10,000 ft/minimum (3,048 m/minimum)

Output Ranges

4 to 20 mA current, two-wire, loop-powered for 0 to

100%, RH (standard) into 0 to 900 Ω

Adjustment

Zero

±20%, non-interactive

Span

±10%, non-interactive

Long Term Stability

Less than 2% drift per year typical

Power Supply

Voltage

12 to 36 VDC

Wiring Connection

Deutsch four-position waterproof connector (For front

wiring only_flying leads for back wiring).

Temperature

Sensing Element

Thermistor, 10 KΩ at 77°F (25ºC), two-wire

measurement

Accuracy at 77°F (25ºC)

±0.5ºF (±0.3ºC). Also available with 100 (RTD with 4 mA

to 20 mA analog output.

Consult factory for further information

Part Number Configuration

Order

Codes:

[1]-[2]-[3]-[4]

1

Model Designation

EHRH-2

Relative Humidity and 10K thermister outputs

EHRHT-2

Relative Humidity and signal conditioned temperature

outputs

2

Output(s)

I

Current (4-20mA) EHRH and EHRHT

V5

Voltage (0-5 VDC) EHRH only

V10

Voltage (0-10 VDC) EHRH only

3

Wiring

F

Front, with waterproof connector

B

Back, flying leads

4

Temperature Channel Range (EHRHT Only)

1

-20°F to +140°F Temperature Rage (Standard Range)

2

0°F to +150°F Temperature Range

3

0°F to 100°F Temperature Range

4

+32°F to +132°F Temperature Range

5

+50°F to +130°F Temperature Range

6

-40°F to +140°F Temperature Range

7

Custom Temperature Range

Example:

EHRH-2-V5-F RH transmitter with 10K thermistor, 2%

accurate RH, 0-5 volt RH output and front-wired

(waterproof connector).

All units have a standard 3-Point factory

calibration (30, 50, 80% RH @ 25°C) standard

relative humidity output range is 0 to 100%.

Standard temperature output range is –20°F

to +140°F. Standard relative humidity and

temperature output signal is 4-20 mA.

AAS-920-233D-03/2014

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© 2014 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice.

Other company names and product names used in this document are the registered trademarks or

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