The CSD 3 is used for monitoring sunshine duration and automates the process previously undertaken by a traditional Campbell-Stokes recorder. The CSD 3 measures solar radiation through a high quality glass tube. It has no moving parts and uses 3 photo-diodes with specially designed diffusers to make an analogue calculation of when it is sunny. The output is switched high or low to indicate sunny or not sunny conditions. The calculated direct irradiance value is also available as a 1mV = 1W/m². The CSD 3 includes an externally controlled two level built in heater, with optional thermostat control, and a robust mounting arm for easy installation.
The CSD 3 was designed as a means of automating the process of measuring sunshine duration for meteorological agencies and replaced the traditional Campbell-Stokes recorders, which only provided highly subjective results from manually checked burn marks on card. The CSD 3 will provide a clear sunny/not sunny output along with an actual value for the calculated solar irradiance.
Sunshine duration is defined by WMO as the time during which the direct solar radiation exceeds the level of 120 Wm². Sunshine Duration Sensors are widely used in weather networks to provide the number of sunshine hours per day for tourist information. In agriculture the CSD 3 monitors the amount of sunshine received by crops. In building automation it can be used to automate the control of sun blinds.
The CSD 3 has no moving parts and uses 3 photo-diodes with specially designed diffusers to make an analogue calculation of when it is sunny. The output is switched high or low to indicate sunny or not sunny conditions. The calculated direct irradiance value is also available as a mV output.
The CSD 3 requires a 12vDC power supply and has a two level built-in heater to dissipate rain, snow and frost. The heaters are normally switched externally but an optional internal thermostat control is available to allow this to be automatically controlled. The unit also includes a replaceable drying cartridge that will remove internal moisture and the CSD 3 includes a humidity indicator to show when this should be replaced.
Features
Specifications
| Spectral Range: | 400 to 1100nm |
| Operating Temp: | -40 to +70°C |
| Sunshine Signal: | 1 ±0.1 V (direct radiation > 120Wm²) |
| Accuracy: | >90% (monthly sunshine hours) |
| Analogue Signal: | 1mV/Wm² |
| Accuracy: | >90% (direct signal for clear sky) |
| Response Time: | <1ms |
| Power Supply:
|
12vDC @ 0.1W Heating Level 1: +1W (dew removal) Heating Level 2: +10W (frost and snow removal) |
| Thermal Switch (Optional):
|
Level 2 ON <6°C, ±3°C Level 2 OFF >14°C, ±3° |
0342901-000
£2,253.00
0342901-003
£2,429.00
0342901-030
£2,585.00
0342901-033
£2,754.00
2523146
£51.00
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