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DAVIS INSTRUMENTS

6490 -- UV Sensor

Category: WEATHER

Model: Optional Sensors

Avaibility: AVAILABLE

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Measures the sunburning portion of the UV spectrum. Allows you to display UV index, dose rate, and daily and accumulated dose.

General

Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +150° F (-40° to +65° C)

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . -50° to +158°F (-45° to +70°C)

Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Semiconductor photodiode

Spectral Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280 to 360 nm (Erythema Action Spectrum)

Cosine Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±4% of reading (0° to 65° incident angle); ±9% of reading (65° to 85°

incident angle)

Supplied Cable Length . . . . . . . . . . . . . . . . . . . . . . . . . . 2' (0.6 m)

Cable Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-conductor, 26 AWG

Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modular RJ-11

I/O Specs

Green wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output (0 to 2.5VDC); 150 mV per UV Index, 364 mV per MED/hour

Black & Red wires . . . . . . . . . . . . . . . . . . . . . . . . . . Ground

Yellow wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3V ±10%, 2.4 mA

Housing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UV-resistant ABS plastic

Dimensions (length x width x height) . . . . . . . . . . . . . . . . 2” x 2.75” x 2.25” (51 mm x 70 mm x 57 mm)

Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 lbs. (226 g)

Sensor Output

Ultra Violet (UV) Radiation Dose

Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . 0.1 MEDs to 19.9 MEDs; 1 MED above 19.9 MEDS

Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 199 MEDs

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5% of daily total

Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to ±2% per year

Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 seconds to 1 minute (5 minutes when dark)

Ultra Violet (UV) Radiation Index

Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . 0.1 Index

Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 16 Index

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5% of full scale (Reference: Yankee UVB-1 at UV Index of 10 [extremely high]) plus 0.5 UV Index per 100' (30 m) of additional cable

Cosine Response . . . . . . . . . . . . . . . . . . . . . . . . . . ±4% (0× to 65× incident angle); 9% (65× to 85× incident angle)

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