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HYGRASGARD® TW - Modbus - T3

Dew point control switches HYGRASGARD® TW - Modbus - T3

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181,39 €
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215,85 € Price plus shipping

Product group: WG01
Dew point control switches HYGRASGARD® TW - Modbus - T3
Patented quality product
(pro-dynamic cross convection patent no. DE 10 2012 015 726.6)

Calibratable dew point control switch HYGRASGARD® TW - Modbus - T3 (compact variant incl. strap) or TW - Modbus - external (detached variant), with Modbus connection, in an impact-resistant plastic housing with quick-locking screws, optionally with/ without display. It reliably detects the formation of dew due to its patented measuring method, the pro-dynamic cross-convection (no conductivity measurement).

The sensor is used to detect various parameters in humidity measurement. It measures the relative humidity (0...100% r.H.) and the temperature (– 35...+80 °C) of the ambient air. These measurands are used to internally calculate the following parameters that can be retrieved via Modbus: 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]. A long-term stable, digital sensor guarantees exact measurement results.
The surface-contact sensor is applied in a non-aggressive, dust-free environment and is suitable for installation in ceilings, ducts and devices. It is used in the refrigeration, air conditioning and clean room technology, engineering rooms, hotels and conference facilities.

Innovative Modbus sensor with galvanically separated RS485-Modbus-interface, selectable bus termination resistance, DIP switch for setting the bus parameters and bus address in current-free state, LEDs for telegram status display, two separate push-in terminals and large three-line display (illuminated; with customised programming in the 7-segment and dot-matrix range). The sensor is factory-calibrated; an environmental precision adjustment by an expert is possible.
Technical details
Voltage supply
24 V AC (± 20 %) and
15…36 V DC
Power consumption
< 1.2 W/ 24 V DC; < 1.8 VA/ 24 V AC
Data points
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
Sensor
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
Sensor protection
membrane filter
Measuring range
0...100 % r.H. (humidity)
– 35...+80 °C (temperature)
Zero point offset
± 10 % r.H. (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
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
Cable gland
2x M 20 x 1.5; with strain relief, exchangeable,
inner diameter 8 - 13 mm
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)*
Standards
CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU