Rainfall Sensor
RS-110 / RS-120 Rainfall Sensor
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High accuracy rain gage
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No external power required
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Self-emptying tipping-bucket design
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Forty foot (12 meter) cable
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Easily mounts to pole, post or flat surface
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Reads rainfall in inches or millimeters
Operation
Rain enters the top of the sensor and passes through a debris-filtering screen. It then collects in one of two tipping buckets. When accumulated rainfall equals 0.01 inches (RS-120) or 0.2 mm (RS-110) the bucket tips, a pulse is output and the second bucket moves into position. Water exits the sensor through screened drains in the sensor’s base. The sensor’s signal cable connects directly to a pulse input on the XR5-SE Data Logger.
Construction
The RS-110 / RS-120 is designed for years of accurate, trouble-free service. Body and base are constructed of tough, UV resistant plastic; the tipping buckets pivot on bearings, minimizing friction and wear. Stainless steel adjustment screws under each tipping bucket allow fine-tuning the sensor’s calibration. A built-in bubble level simplifies installation.
RS-110 / RS120 Specifications
| Sensor | |
|---|---|
| Type | Tipping bucket activates magnetic reed switch |
| Resolution (rainfall per pulse) | RS-110: 0.2 mm RS-120: 0.01 inches |
| Accuracy | For rates up to 2"/hr (50.0 mm/hr): ±4% or ±0.008" (0.2 mm) whichever is greater. For rates from 2"/hr (50.0 mm/hr) to 4"/hr (100.0 mm/hr): ±5%. |
| Attached Cable | |
| Length | 40 ft (12 meter) |
| Type | 2-conductor, 26 AWG, unshielded |
| Termination | Stripped and tinned leads |
| Maximum cable length (if user extended) | 500 ft (See "Extending RS-110's cable" below) |
| Physical | |
| Housing material | UV-resistant ABS plastic |
| Collection area | 33.2 square inches (214 square cm) |
| Overall Dimensions | 9.25" wide x 10.25" high x 11" deep (23.5 x 26 x 28 cm) |
| Weight | 3 lbs. 3 oz. (1.45 kg) (includes hardware and cable) |
| Pulse Output | |
| Minimum pulse width | 30 ms |
| Pulse origin | Normally open contact closure (reed switch) |
Extending the Rainfall Sensor's cable
If the cable supplied with the Rainfall Sensor is not long enough for your application, it may be extended with 22 gage, two conductor copper cable. Maximum length is 500 ft (150 meters).
Installation Guide [PDF File, posted February 2024]
Part No: RS-110 Domestic (USA) Price: $160. Export price: $176.
Part No: RS-120 Domestic (USA) Price: $160. Export price: $176.
