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Optical Rain Gauge RG-9

Rain Gauge RG-15

Product Description

This industrial-grade optical rain gauge is intended to replace conventional tipping buckets rain gauges. It uses beams of infrared light within a plastic lens about the size of a tennis ball. It's maintenance-free; with the round surface of the lens, there are no collections of debris, no moving parts to stick or water-pathways to clog.

RG-9 Solid State Rain Sensor features an open-collector output that emulates a conventional tipping bucket, as well as RS232 serial communications that provide more detailed data allowing for configuration of the device. It can be configured through the serial port, or optionally via DIP switches. A built-in mounting arm allows for convenient mounting to weather station masts, buildings, and other infrastructure. It's also suitable for solar-powered applications.


  • Industrial-grade: reliable, accurate, and rugged
  • Easy-installation: on weather station masts, buildings, and other infrastructures
  • Maintenance-free: no debris and no clogging
  • Wide application scenarios



  • Smart Agriculture
  • Smart City
  • Climate Studies
  • Hydrological Network Monitoring
  • Condensation and Frost Sensing
  • Irrigation Control
  • Drop Detection
  • Wiper Control
  • Process Control
  • Opening and Closing Skylights, Vents, Louvers, or Windows


Input VoltageRange 5-15 VDC on J1 Reverse polarity protected to 50V or 3.3VDC through pin 8 on J2
Current Drain110 uA nominal. (No outputs on, dry not raining) 2-4 mA when raining
OutputNPN Open Collector Output 100 mA / 80V Max
Operating Temperature-40°C to +60°C (Will not detect rain when freezing)
DIP Selectable SensitivityRain Drops
Very light
RS232 Port3.3V
Supported Baud Rates1200, 2400, 4800, 9600, 19200, 38400, 57600
High Accuracy Tipping Bucket-
Wiper Control--
Drop Detection--
Condensation Sensing--
Irrigation Control--
Rain Water Harvest--
"It's Raining Mode"-
Low Power
Unique Hardware--
Current Drain110 uA Nominal 4 mA Raining110 uA Nominal 4 mA Raining
Tipping Bucket Accuracy±10% in our controlled environment-
Serial Communication RS232Command Based BidirectionalCommand Based Bidirectional




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