Hydreon has a Rain Gauge suitable for almost any application that requires a reliable and sensitive rain sensor.
The physical dimensions for each model is the same:
Length: 4.8″ (121 mm)
Width: 2.8″ (71 mm)
Height: 2.2″ (56 mm)
Weight: 4.3 oz (122 g)
Including the moisture proof connector:
Height: 3.0″ (76 mm)
Weight: 4.5 oz (128 g)

| RG-11 | RG-15 | RG-9 | |
|---|---|---|---|
| High Accuracy Tipping Bucket | – | ✔ | – |
| Wiper Control | ✔ | – | – |
| Drop Detection | ✔ | – | – |
| Condensation Sensing | ✔ | – | – |
| Irrigation Control | ✔ | – | – |
| Rain Water Harvest | ✔ | – | – |
| “It’s Raining Mode” | ✔ | – | ✔ |
| Low Power | – | ✔ | ✔ |
| Unique Hardware | Heater Limits frost | – | – |
| Supply Voltage | 10 – 30VDC or 12 – 26VAC | 5VDC – 35VDC | 5VDC – 35VDC |
| Current Drain | 1.5 mA Nominal 15 mA Raining | 110 μA Nominal 4 mA Raining | 110 μA Nominal 4 mA Raining |
| Primary Output | NO, NC Relay | NPN Open Collector | NPN Open Collector |
| Tipping Bucket Accuracy | ±36% 2/3 of the time | ±10% in our controlled environment | – |
| Serial Communication RS232 | Unsupported Transmitted Registers Unidirectional | Command Based Bidirectional | Command Based Bidirectional |
| Individual pricing | $59 | $99 | $49 |
| Buy RG-11 | Buy RG-15 | Buy RG-9 |