Category: Precipitation Sensor

HD2016 is a rain gauge that detects the weight of the rainfall collected by a 400-cm2 inlet. The sensor is a load cell located at the base of the rainfall collection reservoir. The signal from the load cell is processed by the internal electronic board of the rain gauge in order to output information on the rainfall.
Many acquisition systems can be connected to the rain gauge thanks to the multiplicity of outputs available:

• RS485 with MODBUS-RTU or proprietary ASCII protocol output
• SDI-12 output
• Voltage-free pulse contact output

Delta OHM offers a wide range of data logger systems for gathering the data collected by the rain gauge. HD2016 is able to provide the total rainfall, the partial rainfall (from the last reset command or from the last reading command), and the average rainfall rate in the last minute and in the last hour. The measured rainfall is regularly saved into a non-volatile memory, which retains the information even in the event of a power failure.

The automatic discharge of the rainfall collected allows for the use of a compact and lightweight structure for the installation of the rain gauge. so as to ensure accurate measurement even in low-temperature climatic conditions.

If the discharge of the water collected takes place during a rainfall, a retention valve, located at the top of rain gauge, temporarily holds the current rainfall, so to avoid losing the amount of rainfall that falls while discharging.
The rain gauge is equipped with sophisticated features that allow reducing the effects of wind, ensuring a better accuracy and stability of the measurement. An NTC temperature sensor allows keeping under control the internal temperature of the instrument.
The corrosion resistant materials used and the absence of moving parts guarantee a reduced maintenance and a long operating life. The rainfall collecting parts are treated with a nonadherent product for a better water flow.
The rain gauge is factory calibrated and ready for use. A self-diagnostic system periodically checks the correct operation of the instrument and reports any anomalies.
The rain gauge requires 10…15 Vdc power supply.