UVA Sensor (UVA-BTA)
Specifications and User Guide

TROUBLESHOOTING
-Primary Test: Take readings outdoors in the sunlight with and without a barrier, such as a piece of cardboard.

RELATED TIL ENTRIES
–How do the Vernier UVA and UVB sensors work?
–Which UV sensor should I purchase--UVA or UVB?
–UVB Sensor Troubleshooting and FAQs
–Where can I purchase a UV light source?
–Why does my UVA or UVB sensor display incorrect units in Logger Pro v3.4.5.1 and older?
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–Does Vernier sell a weather station?

SPECIFICATIONS
-new order code: UVA-BTA
-old order code: UVA-DIN
-UV peak sensitivity: one volt per 3940 mW/m2 at 340 nm
-Wavelength sensitivity region, approximate: 320 to 375 nm, half-sensitivity points.
-12-bit resolution (LabPro): 5 mW/m2
-10-bit resolution (CBL 2, CBL): 20 mW/m2
-Dimensions: 21 cm by 2 cm diameter
-Time response: approximately 2 seconds to reach 95% of final reading

CALIBRATION
-Calibrate? No. The sensor is set to the stored calibration before shipping.
-It is quite difficult to calibrate a UV sensor to read in absolute units, since you must have a source of known UV intensity and spectral distribution. More often you will simply want to calibrate the sensor in terms of a relative intensity. Refer to the detailed instructions for calibration on page 3 of the sensor booklet.

RELATED VERNIER PRODUCTS
UVB Sensor (UVB-BTA)