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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Patented quality product (pro-dynamic cross convection patent no. DE 10 2012 015 726.6)
Calibratable dew point control switches HYGRASGARD® TW - Modbus - T3 incl. strap/ with detached sensor head, with Modbus connection. It reliably detects formation of dew by means of its humidity and temperature sensor (no conductivity measurement) and, thanks to its patented measuring method, pro-dynamic cross convection, yields an exact measurement result, with/ without optional display.
The universal surface-contact sensor is used to detect various parameters in humidity measurement. The relative humidity and temperature of the ambient air are measured. These measurands are used to calculate various parameters internally. The Modbus can be used to retrieve the following parameters: relative humidity [% r. h.], absolute humidity [g/ m³], mixture ratio [g/ kg], dew point temperature [°C], enthalpy [kJ/ kg] (ignoring atmospheric air pressure) and ambient temperature [°C].
It is used in non-aggressive, dust-free environments, in the refrigeration, air conditioning and clean room technology, hotels, engineering rooms, meeting and conference facilities. The sensor is suitable for ceiling and duct installation or for integration in equipment. Fine adjustment by the user is possible.
24 V AC (± 20 %) and
15…36 V DC
|Power consumption||< 2 W/ 24 V DC, < 3.5 VA/ 24 V AC|
Temperature [°C], relative humidity [% r. h.],
dew point [°C], absolute humidity [g/ m3],
mixture ratio [g/ kg], enthalpy [kJ/ kg]
|Deviation of humidity||
typical ± 2.0 % r. H. (20…80 % r. H. ); at + 25 °C, otherwise ± 3.0 % r. H.
|Temperature deviation||typically ± 0.2 K at +25 °C|
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
|Sensor protection||membrane filter|
0...100 % r.H. (humidity)
– 35...+80 °C (temperature)
|Zero point offset||
± 10 % r.H. (humidity)
± 10 °C (temperature)
|Ambient temperature||–30...+70 °C|
clean air and
non-aggressive, non-combustible gases
Modbus (RTU mode),
address range 0...247 selectable
|Signal filtering||4 s / 32 s|
endless metal strap with metal tightener,
300 mm, for pipes up to 3 ''
(included in scope of delivery)
|Electrical connection||0.2 - 1.5 mm2, via push-in terminal|
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted/ Phillips head - combination),
colour traffic white (similar to RAL 9016)
|Housing dimensions||108 x 78.5 x 43.3 mm (Tyr 3 without display)|
2x M 20 x 1.5; with strain relief, exchangeable,
inner diameter 8 - 13 mm
TW - Modbus with strap for direct mounting on pipes
or for direct mounting on flat surfaces
(e.g. walls, ceilings)
|Permissible air humidity||< 95 % r. H., non-precipitating air|
|Protection class||III (according to EN 60 730)|
|Protection type||IP 65 (according to EN 60 529)|
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
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