with analogue intensity output
New developed unit for the economical regulation of precipitation intensities basing on the proven maintenance-free optical technology.
Range of application:
Artificial irrigation / Irrigation control
Control of intensity and quantity of precipitation events
Flood control measuring / Flood protection
The precipitation sensor serves as measuring instrument for the determination of the instantaneous precipitation intensities (mm precipitation / min.). By integration of the precipitation intensities, the precipitation quantity can be calculated, as well. Control- and warning signals can be derived from the precipitation intensity. The measuring signal output is an intensity-dependent analogue current value. The whole measurement range is divided into 4 linear characteristic segments, which shows a tenth of the slope of the more sensitive segment. Thus, it is possible to represent an intensity range from approx. 0,001mm/min. (light drizzle) up to 10 mm/min. (extremely heavy rain) with reasonable resolution (quasi-logarithmic output).
Mode of Operation
Precipitation in the form of drizzle, rain, snow, or hail falls through a light band, induced by light diodes, and lead to shadowing effects on the receiving side. The sent light is pulse-modulated so that outside light effects cannot falsify the measurement results. The instrument is equipped with a heating system for extreme weather condition. This avoids ice and snow forming on the housing surface. In addition, the surface retains a temperature of >0° by means of a regulated heating.
|Measuring Value||Precipitation intensity|
|Measuring range||0 – 0,01 mm / min >> 4,0 – 8,0mA
0,01 – 0,1 mm / min >> 8,0 – 12,0 mA
0,1 – 1,0 mm / min >> 12,0 – 16,0 mA
1,0 – 10 mm / min >> 16,0 – 20,0 mA
|Output||constant current, depending on measuring value, between 4,0mA and 20,0mA|
|Active sensor surface||25 cm²|
|Minimum drop size||0,2 mm|
|Operating voltage||24 V AC/DC ± 15 %|
|Operating current||approx. 90 mA|
|Heating current||max. 1A|
|Ambient temperature||-25 … +55°C|
|Protection||IP 65 acc. to DIN 40050|
|IEC 61000-6-2: 2005||Electromagnetic compatibility
Immunity for industrial environment
|IEC 61000-6-3: 2006||Electromagnetic compatibility
Emission standard for residential, commercial and light industrial environments
|IEC 61010-1: 2001||Safety requirements for electrical equipment for measurement, control and laboratory use.
Part 1: General requirements