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SDS 200 Sunshine Recorder

Make: Schelt Technology
Model: SDS-200

The Sunshine Sensor functions by comparing sunlight to shadow, when the ratio exceeds a predetermined threshold, the sun is deemed to be shining and the counter will count up one every 36 seconds (0.01 hour). The Sensor is designed to be mounted on a mast. The mast should be sited where trees, buildings, etc. will not cause a shadow at any time of day throughout the year. The Sensor is best mounted on the top of a mast above any aerials etc and pointed approximately South (North in the Southern hemisphere) to avoid shadows.


  • External Sun Duration Sensor
  • four-core cable
  • 12V DC Adaptor
  • Control Box (Optional)


The control box for our hobbyist Sun Shine sensor has just the right amount of features for monitoring sun duration.
On the outside, it has been kept simple for ease of use. On one end, you’ll find the DC power socket and a 3.5mm jack socket for connecting to the counter wall display. The other end has holes for the sensor cable entry and another for using the “Aux” output if required.


The display can be mounted in one of two ways. Either through the holes in its base, which are 105mm apart and 5mm in diameter,
The display can be DIN-rail mounted.
Instromet is able to offer DIN rail in 50 cm and 100 cm lengths. This option is ideal if you are considering expanding the system with others in the Instromet range, allowing them all to be mounted together uniformly.

DIN rail part numbers:
50cm – 30532/02
100cm – 30532/01


The sun sensor display utilizes three main screens, which constantly switch between themselves. The first screen is the time and date screen, the second is the counter display screen, and the third screen shows the first and last times the sun was received by the outdoor sensors.


Schelt Technology



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