Duct humidity and temperature sensors HYGRASGARD® KFTF-20 VA

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Product group: WG02
Duct humidity and temperature sensors HYGRASGARD® KFTF-20 VA
Calibratable HYGRASGARD® KFTF - 20-VA humidity and temperature transmitter (± 1.8%) with metal sinter filter, rugged housing in V4A stainless steel, optionally with/without display, with cable gland or M12 connector according to DIN EN 61076-2-101.
The sensor device measures relative humidity and air temperature and converts these measurand into a standard signal of 0-10 V or 4...20 mA. It supports four switchable temperature ranges and is applied in non-aggressive dust-free atmospheres in refrigeration, air conditioning, ventilation and cleanroom engineering. The measuring transducer provides precise detection of humidity. A digital long-term stable sensor is used as measuring element for humidity. The sensor is factory-calibrated and can be fine-tuned to ambient conditions by an expert.
Technical details
Power consumption
< 1.1 VA/ 24 V DC
Measuring range, humidity
0...100 % r. H.
(output corresponding to 4...20 mA)
Deviation of humidity
typical ± 1.8 % r. H. (10…90 % r. H. ); at + 25 °C, otherwise ± 2,0 % r. H.
Output, humidity
4...20 mA
Measuring range, temperature
multi-range switching
–35...+35 °C; –35...+75 °C; 0...+50 °C; 0...+80 °C
(output corresponding to 4...20 mA)
Temperature deviation
typically ± 0.2 K at +25 °C
Output, temperature
4...20 mA
Sensor protection
metal sinter filter, Ø 16 mm, L = 32 mm, exchangeable,
stainless steel V4A (1.4404)
Ambient temperature
storage –35...+85 °C;
operation – 30...+75 °C, non-precipitating
Process connection
by screws via the mounting fixture on the housing
Protective tube
stainless steel V2A (1.4301), Ø 16 mm
NL = 137 mm
Electrical connection
2-, 3- or 4-wire connection
0.14 -1.5 mm ² via terminal screws on circuit board
stainless steel V4A (1.4571),
with non-distortion cover bolting,
impact-resistant, high EMI shielding,
corrosion, temperature, UV and weathering resistant
Housing dimensions
143 x 97 x 61 mm (Tyr 2E)
Long-term stability
± 1 %/ year
Permissible air humidity
< 95 % r. H., non-precipitating air
Protection class
III (according to EN 60 730)
CE conformity,
according to EMC directive 2014/ 30/ EU,
according to EN 61326-1, according to EN 61326-2-3