Catalogues - humidity-transmitte

Catalogue Humidity transmitte

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which protects against mechanical damage and external impurities.

Digital operation permits adaption onto sensor characteristics (separate for temperature and moisture and is located inside the housing. Electrical connection is performed with an angled standardised connector.

Signals for moisture and temperature are separately available. Fixing holes in the housing for wall mounting are accessible after removing the lid. A special adaptor features mounting the sensor in a duct.

TECHNICAL DATA

INPUT_

Humidity, relative

Capacitive thinfilm Polymer-sensor

STANDARD SENSOR

0...100 % rH (inclusive condensation) Nominal range: 30...80 %

Conformity: ±1%rH Hysterisis: ±2%rH Response time: 45 s Operative range: -40...100 °C

HIGH-HUMIDITY SENSOR

0...100 % rH (inclusive condensation) Nominal range: 5...95 % rH

Conformity: ±1% rH

Hysterisis: ±2%rH

Response time: 30 s Operative range: -40... + 100 °C

TEMPERATURE

Pt1000 DIN, 1/3 DIN Range: -40... + 120 °C Conformity: ±0.4 %

PROFILE

Humidity is presented in various methods, as relative value in % rH, (ratio of moisture distributed in the air to the maximum of moisture in air), or absolute as g H₂O/Nm³dryair¹¹.

Humidity transmitters are especially designed for monitoring of relative humidity in air conditioning systems as also within industrial processes.

The used two-wire technology features easy installation because supply and signal are united and running via the same pair of wires. Combined humidity and temperature measurement with a second sensing element (-Pt1000-) provide not only for storage and air conditioning special features by simplified mounting and wiring.

Local digital display features easy reading as also scaling of span. An internal lock prevents unauthorized access.

DESCRIPTION

Relative humidity is detected by means of a Polymer capacitor, whose capacity changes with effect to the moisture in the surrounding air. The capacitive change is calibrated in relative humidity and trans- formed into the 4...20 mA signal.

This capacitor is, like the Pt1000 in the combi-version, mounted inside a supporting tube with protective cage,

DISPLAY

LCD 4-digits

During operation the relative humidity is displayed [ %RH]. For the combi version the display alternates with temperature (hint via arrow).

OUTPUT

Standard current signal: 4...20 mA Load

ЯU supply Umin ^V (-}

Load n no a lì Lead

0,02 A Characteristic

Humidity respectively temperature, linear

Conformity : see input +0.2 %

Measuring range

Freely scalable

OPERATION_

The output signal can be scaled according to the required measuring range. The Min and Max values can be selected. It also is possible to set the temperature units °C or °F. Setting is locked via internal jumper.

POWER SUPPLY_

DC-voltage: 12...30VDC (separate for humidity and temperature)

Effect of supply: 0.1%/10V Permissible ripple: 0.5 V_pp