Kritech & Co PGmbH

Solar Radiation
Sensors

       Atmospheric
       Science
       Instruments

UVS-A-T

The UVS-A-T has a broad spectral response optimized for precise measurements of atmospheric UV-A irradiance.

The high accuracy UVS-A-T is thermostated (heated / cooled at 25 ºC) including filters, detector and pre-amplifier. Due to the heating / cooling element it requires external power.

The UVS-A-T has a sealed, weather resistant case made from protected aluminum. The sensor permits continuous outdoor operation. The UVS-A-T can easily be adjusted in the horizontal by help of three leveling screws and the built-in circular bubble level.

The screw-in drying cartridge is easy to remove and the replacement desiccant is supplied in convenient refill packets.

Main features :

Spectral sensitivities precisely adapted to the measurement task
Very good cosine response: ±2.5 % between 0 º and 70 º zenith angle
Excellent long-term stability
Internal thermostatting at 25 ºC

Specifications :
Spectral range	UV-A (315 to 400 nm)
Supply Voltage	7 to 18 VDC
Output range	0 to 90 W/m² = 0 to 3 V
Zero offset (in darkness)	< 10 mV
Response Time (99%)	< 1,5 s
Non-stability (% change / year)	< 5 %
Non-linearity (over full measurement range)	< 1 %
Accuracy	> 95 % (for daily sum)
Directional error	< 2,5 % (at 70 ° zenith angle)
Operating temperature	-40 to +50°C

Available documents (PDF files) :
	English