Rain sensor

SKU: NW/O

Category: Sensors

change-over contact
rain yes/no
heated glass-coated ceramic

Alarm output: relay
Cable: 3 m (5x0,14 mm²)
Supply voltage: 11...28 V AC, 10...32 V DC

336,87 €

incl. 19% VAT , plus

This item has variations. Please select the requested variation.

The rain monitor NW/O is designed to act as a sensor detecting the start and end of precipitation. It is used as a status indicator or sensor for controlling downstream safety devices (control units) protecting windows, ventilation flaps, sunblinds, awnings, etc. The sensor area takes the form of a capacitor on glass-coated ceramic. Glass passivation ensures that the rain monitor is extremely environment-resistant as well as robust while offering good long-term stability and resistance to aggressive media. Whenever precipitation strikes the rain monitor and wets the sensor surface, this changes the capacitance of the surface, so triggering a switching signal, i.e. wetting of the sensor surface signals the precipitation status 'yes'. To protect the sensor surface from bedewing and icing-up, it is heated to an overtemperature of approx. 2 K. When the sensor surface is wetted, it is adjusted to approx. 10 K above the ambient temperature, so ensuring fast faster drying. Once it has dried, the device switches to the precipitation status 'no'.

Measurement range precipitation:	yes/no
Sensor area:	18 cm²
Supply voltage:	11...28 V AC or 1...32 V DC (max. 0,75 A)
Alarm output:	potential-free change-over contact, max. 26 V AC / 36 V DC, 500 mA
Switch-on delay:	< 0.5 s output signal, 15 s heating
Electrical connection:	3 m cable LiYY 5 x 0,14 mm² (included)
Rain (yes):	relay in resting position (also with UB = 0)
Rain (no):	relay in working position (tightened)
Housing:	polycarbonate PC, UV-stabilised, white RAL 9010
Protection type:	IP66
Working temperature:	-30...+60°C
Storage temperature:	-20...+50°C
Installation:	wall fastening, mounting kit for mast fastening Ø 35-50mm (in scope of delivery)
Approvals:	CE, EAC, RoHS