Duct humidity and temperature sensor HYGRASGARD® KFTF-20 Modbus

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Product group: WG01

Duct humidity and temperature sensor HYGRASGARD® KFTF - Modbus

Quality product for the HVAC sector, accuracy ±3% or ± 2%

The measuring transducers are used in non-aggressive, dust-free environments, in refrigeration, air conditioning and cleanroom engineering, hotels, engineering rooms, meeting and conference facilities. They provide precise detection of temperature and humidity. A digital, long-term stable sensor is used as a measuring element for humidity and temperature. Fine adjustment by the user is possible. The sensor is suitable for ceiling and duct installation or for integration in equipment.

Voltage supply

24 V AC (± 20 %) and
15…36 V DC

Power consumption

< 1,0 W/ 24 V DC
< 2,2 VA/ 24 V AC

Data points

Temperature [°F], relative humidity [% RH],
dew point [°F], absolute humidity [gr/ft³],
mixture ratio [gr/lb], enthalpy [Btu/lb]

Measuring range, humidity

0...100 % RH

Deviation of humidity

typical ± 1.8 % (10…90 % RH ); at + 25 °C, otherwise ± 2,0 %

Measuring range, temperature

-31...+176 °F

Temperature deviation

typically ± 1.1 F at +77 °F

Sensor

digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability

Sensor protection

plastic sinter filter, Ø 0.63 in, L = 1.38 in, exchangeable
(optional metal sinter filter, Ø 0.63 in, L = 1.26 in)

Measuring range

0...100 % RH (humidity)
-31...+176 °F (temperature)

Measuring ranges

0...100 % RH
-31...+176 °F

Zero point offset

± 10 % RH (humidity)
± 9 °F (temperature)

Ambient temperature

-22...+158 °F

Medium

clean air and
non-aggressive, non-combustible gases

Bus protocol

Modbus (RTU mode),
address range 0...247 selectable

Signal filtering

4 s / 32 s

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 = 9.3 in (optionally 3.9 in), vmax = 98.4 ft/s (air)
(option on request in stainless steel V2A (1.4301), Ø 0.63 in)

Cable gland

2x M 12 x 1.5 (Y-adapter); with strain relief,
exchangeable, max. inner diameter 0.24 in

Long-term stability

± 1 % per year

Permissible air humidity

< 95 % RH, non-precipitating air

Protection class

III (according to EN 60 730)

Protection type

IP 65 (according to EN 60 529)*

Protection type housing

IP 65