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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Quality product for HVAC sector, accuracy 3 % r.H.
The calibratable humidity and temperature sensor HYGRASGARD® RFF/ RFTF measures the relative humidity and/ or the temperature of the air. It converts the measurands humidity and temperature into a standard signal of 0 - 10 V or 4...20 mA, and is available with or without an optional display (for displaying actual humidity and actual temperature), in an elegant housing made of plastic, with snap-on lid, base with 4-hole attachment for installation on vertically or horizontally installed in-wall flush boxes, with predetermined breaking point for on-wall cable entry, or in an housing made of stainless steel (top and bottom part are of stainless steel, the lid is screwed on), vandal-proof version e.g. for schools, military barracks, and public buildings. Relative humidity (in % r. H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature.
It is used in non-aggressive, dust-free environments, in refrigeration, air conditioning and clean room technology, in interior rooms, such as living rooms, offices, hotels, engineering rooms, meeting and conference facilities. The measuring transducers are designed for exact detection of temperature and humidity. A digital, long-term stable sensor is used as a measuring element for humidity and temperature measurement. Fine adjustment by the user is possible.
24 V AC (± 20 %) and
15…36 V DC
< 1,0 VA/ 24 V DC
< 2,2 VA/ 24 V AC
|Load resistance||RL > 5 kOhm|
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
|Measuring range, humidity||
0...100 % r. H.
(output corresponding to 0 -10 V)
|Operating range, humidity||0...95 % r. H. (without dew formation)|
|Deviation of humidity||typical ± 2 % r. H. (20…80 % r. H. ); at + 25 °C, otherwise ± 3 %|
|Output, humidity||0 - 10 V|
|Measuring range, temperature||
0...+ 50 °C
(output corresponding to 0 -10 V or 4... 20 mA or Ohm value)
others upon request!
|Operating range, temperature||0...+50 °C|
|Temperature deviation||typically ± 0.2 K at +25 °C|
|Output, temperature||0 - 10 V|
storage –25...+50 °C,
operation –5...+55 °C
2-, 3- or 4-wire connection
0.14 -1.5 mm ² via terminal screws on circuit board
plastic, material ABS,
colour pure white (similar to RAL 9010)
|Dimensions||85 x 85 x 27 mm (Baldur 1)|
wall mounting or on in-wall flush box, Ø 55 mm,
base with 4 holes, for attachment to vertically or
horizontally installed in-wall flush boxes for rear cable entry,
with predetermined breaking point for cable entry
from top/ bottom in case of plain on-wall installation
|Long-term stability||± 1 %/ year|
|Protection class||III (according to EN 60 730)|
|Protection type||IP 30 (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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