Duct humidity and temperature sensor HYGRASGARD® KFTF-35

output

Display

Product group: WG02

Condensation-protected ductsensor HYGRASREG® KFTF-35 with active and switching output, housing made of impact-resistant plastic with quick-locking screws, cable gland, plastic sinter filter (replaceable), optionally with/ without display, for detecting relative humidity (0…100 % RH) and temperature (4 switchable measuring ranges, max. 0...+100 °C) as well as for determining various parameters of humidity measurement technology. The measuring transducer converts the measured variables into a standard signal of 0 - 10 V or 4…20 mA.

The unit is specially designed for use in the high humidity range (95…99 % RH). A long-term stable, digital humidity and temperature sensor is used. Overtemperature prevents or hinders dew formation on the humidity sensor. A second, separate temperature measuring element is used to determine the actual relative humidity of the ambient air. The following measured variables are calculated internally from these parameters and are retrievable via output OUT3: absolute humidity, mixing ratio, dew point and wet bulb temperature (can be changed via DIP switch).
The sensor is used in medical technology, refrigeration technology, control technology, air conditioning and clean room technology. The sensor is factory-calibrated; an environmental precision adjustment by an expert is possible.

Voltage supply

24 V AC/ DC

Power consumption

< 3 VA/ 24 V DC ; when heating

Data points

Temperature [°F], relative humidity [% RH], absolute humidity [gr/ft³],
dew point [°F], mixing ratio [gr/lb], wet bulb temperature [°F]

Measuring range, humidity

0...100 % RH

Operating range, humidity

10 … 99 % RH (probe), 10 … 95 % RH (enclosure)

Measuring range, temperature

+32...+122 / -4...+122 / -4...+176 / +32...+212 °F

Operating range, temperature

+32...+122 °F

Measuring accuracy

± 0.5 K at + 20 °C

Sensor protection

metal sinter filter, exchangeable

Current consumption

max. 100 mA when heating

Measuring ranges

0...100 % RH
+32...+122 / -4...+122 / -4...+176 / +32...+212 °F

Accuracy

± 2 % RH (40…60 %) at + 20 °C

Ambient temperature

storage - 25 …+ 60 °C,
operation -5 …+ 55 °C

Process connection

by mounting flange, plastic
(included in the scope of delivery)

Protective tube

PLEUROFORM, material polyamide (PA6), with torsion protection,
Ø 0.79 in, NL = 9.25 in (optionally 3.94 in), vmax = 98,4 ft/s (air)

Electrical connection

3- or 4-wire connection
0.14 -1.5 mm ² via terminal screws on circuit board

Housing

plastic, UV-stabilised,
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted/ Phillips head - combination),
colour traffic white (similar to RAL 9016)

Cable gland

M 16 x 1.5, including strain relief, exchangeable,
max. inner diameter 0.4 in

Dimensions

4.25 x 2.76 x 2.89 in (Thor 2)

Protection class

III (according to EN 60 730)

Protection type

IP 65 (according to EN 60 529)*

Protection type housing

IP 65

Standards

CE conformity, electromagnetic compatibility
according to EN 61 326 + A1 + A2,
EMC directive 2004/ 108/ EC