Multi-funtional duct sensor
For humidity, temperature, pressure, differential pressure and volume flow for monitoring and controlling heating, ventilation and air-conditioning systemsPREMASGARD® 814x-Modbus
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Calibratable duct humidity and temperature sensor HYGRASGARD® KFTF - 20 (± 1.8 %)
with plastic sinter filter (optional metal sinter filter), housing made from impact-resistant plastic,
optionally with/ without display, with cable fitting or bushing for M12 connector according to DIN
Calibratable humidity and temperature sensor HYGRASGARD® KFTF - 20-VA (± 1.8 %) with metal sinter filter, rugged housing, stainless steel V4A, optionally with/ without display, with cable fitting or bushing for M12 connector according to DIN EN 61076-2-101.
It measures the relative humidity and/ or the temperature of the air and converts the measurand into a standard signal of 4...20 mA . It has four switchable temperature ranges and is applied in non-aggressive dust-free atmospheres in refrigeration, air conditioning, ventilation and clean room technology. Relative humidity (in % r. H.) is the quotient of water vapour partial pressure and the saturation vapour pressure at the respective gas temperature. These measuring transducers are designed for exact detection of humidity. A digital long-term stable sensor is used as measuring element for humidity measurement. Fine adjustment by the user is possible.
15...36 V DC
depending on working resistance, residual ripple stabilised ± 0.3 V
|Power consumption||< 1.1 VA/ 24 V DC|
|Working resistance||Ra (ohm) = (Ub -14 V)/ 0.02 A for I variant|
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
|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||
–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|
metal sinter filter, Ø 16 mm, L = 32 mm, exchangeable,
stainless steel V4A (1.4404)
storage –35...+85 °C;
operation – 30...+75 °C, non-precipitating
|Process connection||by screws via the mounting fixture on the housing|
|Protective tube||made from stainless steel V2A (1.4301), Ø 16 mm, NL = 197 mm|
2-, 3- or 4-wire connection
0.14 -1.5 mm ² via terminal screws on circuit board
cable fitting, stainless steel V2A (1.4305)
(M 20 x 1.5; with strain relief, exchangeable,
inner diameter 6 - 12 mm)
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)|
|Protection type||IP 67 (according to EN 60 529)|
according to EMC directive 2014/ 30/ EU,
according to EN 61326-1, according to EN 61326-2-3
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