Rain

Rain sensor

• Article No.

  52 G315

• Application

  The sensor detects precipitation such as rain or snow within seconds and sends a message by means of a potential-free relay contact (fault relay). This switching output may be forwarded to, for instance, ventilation or shading systems in automated greenhouses. Sensitivity settings are not required. It detects even light drizzle, without giving a false rain signal in case of light dew.

• Functional description

  If the response threshold is exceeded, the installed fault relay trips immediately. The integrated sensor heating is also fully activated at the same time. The automatic reset delay period begins when the sensor surface has dried (value falls below limit value plus hysteresis). It is set to approximately 5 minutes. From the start of the reset delay period until "rain" is reported again, the sensor heating switches down to 25% of its full power. This pre-heating prevents false rain messages due to fog or dew, for example. The rain sensor is delivered with mast mounting hardware.

• Components

  • INT820 L Digital controller for greenhouse ventilation
  • INT810 LR Greenhouse controller for one ventilation unit
  • INT800 LD Greenhouse controller for two ventilation units
  • INT800 HL Greenhouse computer for one compartment - heating, ventilation, dehumidification
  • INT800 WED Weather station with FIC interface
  • INT1000 OSC (One-section controller)
  • INT1000 TSC (Three-section controller)