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.

Available configurations

Artikelnummer	Bezeichung
1201-3216-1000-030	HYGRASGARD® KFTF-20-Modbus
1201-3216-1200-030	HYGRASGARD® KFTF-20-Modbus LCD

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 [°C], relative humidity [% RH],
dew point [°C], absolute humidity [g / m³],
mixture ratio [g / kg], enthalpy [kJ / kg]

Measuring range, humidity

0...100 % RH

Deviation of humidity

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

Measuring range, temperature

–35...+80 °C

Temperature deviation

typically ± 0.6 K at +25 °C

Measuring accuracy

± 1,8 %

Sensor

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

Sensor protection

plastic sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional metal sinter filter, Ø 16 mm, L = 32 mm)

Measuring range

0...100 % RH (humidity)
-35...+80 °C (temperature)

Measuring ranges

0...100 % RH
–35...+80 °C

Zero point offset

± 10 % RH (humidity)
± 5 °C (temperature)

Ambient temperature

–30...+70 °C

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 20 mm, NL = 235 mm (optionally 100 mm), vmax = 30 m/s (air)
(option on request in stainless steel V2A (1.4301), Ø 16mm)

Cable gland

2x M 12 x 1.5 (Y-adapter); with strain relief,
exchangeable, max. inner diameter 6 mm

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