Hydreon RG-9 Optical Rain Sensor NPN & RS-232

Hydreon RG-9 Optical Rain Sensor NPN & RS-232

SKU: HYS-005

Hydreon RG-9 Solid State Rain Sensor is a rain sensor  intended to detect and communicate when a pre-selected rain intensity has been reached

  • Manufacturer: Hydreon
  • $62.64
In stock(8 items available)

The Hydreon RG-9 Solid State Rain Sensor is a rainfall sensing device intended to detect and communicate when a pre-selected rain intensity has been reached or exceeded.The RG-9 is rugged, reliable, and maintenance-free.

The RG-9 uses beams of infrared light within a plastic lens about the size of a tennis ball. The round surface of the lens discourages collection of debris, and the RG-9 has no moving parts to stick, and no water-pathways to clog.The device features an open-collector output that indicates when the selected rain intensity has been reached. 

The sensitivity levels are: Rain Drops, Very Light, Medium, Heavy.  The duration of the positive detection is also selectable: No Hold, Hold Time 5 Minutes, Hold Time 10 Minutes, Hold Time 15 Minutes.

The RG-9 has multiple outputs: visual output via an on-board LED, Open Collector output and RS232 serial communications that provide more detailed data, including 8 near real-time rain intensity levels and allow for reading the status and configuration of the device.  Power consumption of the RG-9 is very low, and the device is well-suited to solar-power applications.

    • SKU
    • Weight
      0.5 kg
    • Dimensions (L x W x H)
      10 x 8 x 10 cm

Input Voltage

  • Range 5-35 VDC on J1 or 3.3VDC through pin 8 on J2
  • Reverse polarity protected: 50 V

Current drain

  • 110 μA nominal. (No outputs on, dry not raining) 2-4 mA when raining


  • NPN Open Collector Output  100 mA / 80V Max

Operating temperature: -40 to +60 °C Will not detect rain if freezing

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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