Do you have a process or device that needs to know that it is raining? The RG-11 produces an output that turns on when it is raining, and off when it stops.  The sensor is extremely sensitive, and can be set to trigger on the first detected drop.  Alternatively, the sensor may be set to turn-on at a rain intensity threshold.  See the RG-11 instructions for details on setting the sensitivity. 

Almost as useful, the RG-11 Rain Sensor opens the relay when the rainfall stops; it does not need to wait for the water to evaporate. 

Other rain sensing technologies have serious drawbacks:

• Conductive sensors do not turn off until the water evaporates, and are prone to getting stuck on due to contaminants.
• Tipping buckets are bulky and fragile.
• Irrigation-style, absorbent disks require a lot of water to trip and stay on for days.

An  RG-11 used to automate vents for a greenhouse. - Photo courtesy of Dave Mischler, Mischler's Florist

A Rain Gauge is used to control sky light windows

The RG-11 makes it easy for you to incorporate rain sensing into your system.  None of the competing technologies make it easy to set an intensity threshold.

  You can set the output to remain on for 15 minutes after the last rain has stopped.  Use this, for example, in order to prevent equipment from constantly turning on and off or opening and closing during changing rain conditions.

Included especially for sun-shield awning control, the RG-11 Rain Sensor can also be set to trigger the output whenever it is dark.

The RG-11 is the perfect rain sensor for:

• Opening and closing skylights, vents, louvers, or windows.
• Process Control
• Retracting Awnings
• Enabling / Disabling  equipment
• Data Collection

Our rain sensor (shown in detail in inset) deployed to close an astronomical observatory at the first detected raindrop.  This solar-powered application takes advantage of the RG-11 micro-power mode.

RG-11 Optical Rain Sensor / Rain Gauge. Rugged, sensitive and low maintenance.