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Passive Cloud Cover Detector
Quantity
Specifications
| Temperature range | -20 to +50 deg C |
|---|---|
| Mounting | In the lower part of the box there are four channels| for M6 screws| ( on a rectangle 82 204 mm) that can be used for the mounting |
| Power Supply | 12 Volt DC |
| Output | Analog 0 to 5V| for CCF 0 to 100% |
| Current consumption | about 20 mA for electronics and about 60 mA for heating |
| Typical accuracy in CCF output | 0.2 |
| Approx size of box | 22129 cm ( hight of plastic dome about 5 cm extra ) |
Key Features
- Bulk Quantities Available
Product Details
This innovation makes it possible to get automatic observations of the Cloud Cover Factor, CCF 24 hours a day. It consists of a daytime unit that observes the sky in 4 directions in parts of the solar spectrum, a nighttime unit that observes the sky in the thermal infrared spectrum, and a microcomputer for evaluating the signals. The bearing principle at nighttime is not the same as that during daytime. At nighttime, the difference between the incoming and outgoing thermal infrared radiation is measured using a type of bolometer. In the daytime, the sky is observed using 4 silicon photodetectors in different parts of the sky. The exact concept is still our secret but we can say that the calculations for calculating the cloud cover factor are made in a microcomputer. The microcomputer also calculates when the output is taken from the night ( infrared ) information or from the daytime ( shortwave ) information.