RHD-Rain Sensor

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Make: Sommer Model: RHD

✅ The RHD is a low-cost, high precision, ultra-robust rain gauge.

✅ Measurand : Liquid: rain, drizzle/rain, mixed rain/snow, sleet. Solid: hail.

✅ Sensor Type : RHD sensor.

✅ Signal Output : Analog Output, SDI-12, V1.3 ,RS-232, Modbus RTU (RS485)

SKU: Sommer-RHD-Rain Sensor

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Description

EXTREMELY ROBUST AND RELIABLE ACOUSTIC RAIN SENSOR

The RHD is a low-cost, high precision and ultra-robust rain sensor. It features very low-power consumption, is maintenance-free and has a completely sealed acoustic detector with no moving parts. The sensing device is a polished stainless steel hemisphere supported by a strong stainless steel arm. It detects changes of the acoustic pressure that are induced by the impact of raindrops or hailstones. The RHD also includes a distrometer that returns the drop size distribution.

FIELDS OF APPLICATION

With its disdrometer and hail detection functions the RHD is a valuable instrument for soil erosion forcast and precipitation monitoring in agriculture. As this sensor is maintenance free, it is also suitable for remote weather stations (on- and offshore) and scientific research.

Details & Specifications

Make	Sommer
Model	RHD
General Specification	:-
Weight	1.4 kg (without mounting kit)
Dimension	Dimension (H x W x D): 260 mm x 430 mm x 160 mm (with mounting kit)
Collector Area	Measuring Surface: 160 mm outer diameter hemisphere (402 cm2)
Precipitation Type	Precipitation detected by the sensor: Liquid (undifferentiated): rain, drizzle/rain, mixed rain/snow, sleet., Solid: hail.
Accuracy	Rain Intensity accuracy: 15% at 100% duty-cycle (most global precision and accuracy criteria) Measurement accuracy (liquid only): A spatially distributed flux of controlled drops of a nominal diameter equal to the center diameter of the class ± 20% produces an output centred in the corresponding class with typically ± 50% of the flux concentrated into the two lateral size classes. Hail detection: Counting of the number of hailstone impacts up to 5 impacts per second and for hailstone diameter detection threshold of 0.5 cm.
Power Supply	Voltage: 6 V to 30 V DC (9.6 V and 16 V DC in case of powering through the SDI-12 terminals) Current: < 1 mA in stand-by mode and 20 mA max in acquisition mode. For a typical nominal duty-cycle of 10%: 2.1 mA (20 mA for duty-cycle of 100%).
Operating Environment	Temperature range: -40°C to +80°C, Relative humidity: 0 to 100%
Protection Level	IP67, survive to 1 m temporary immersion in salt water