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The Ann Arbor District Library has one of these available for checkout, so that's the one I'm reviewing. Simple enough to use even without a manual, durable construction. The screw mount is handy. Can't comment on calibration or accuracy, but I'm mostly using it for rough estimates of relative intensity and not precisely calibrated ere was actually some sunlight in Michigan in February so I took it outdoors to obtain a reading just to prove it. I'd think this might be a more interesting device for outdoor use in the summertime.
Had to test this. I knew I was living with deaf people. Just [email protected]#$%! recorded time and day!
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perfect and accurate torque meter. used it to verify torque of little motors.
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Portable and simple to use
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The UVA/B sensor on the meter responds only to UV light between 290 and 375 nm not the 280-400 nominally stated on the description. For measuring radiation from interior lights such as HID lights it is important to interpolate somewhat as to the actual amount of UVA radiation emitted by these lights as most radiation occurs between 380-400 nm. Actual maximum sensitivity occurs between 310-360. The calibration of the instrument also plays a factor in interpreting the result. For me the instrument confirmed the presence of UV light and it can detect variations in strength of a single type of light source, but is somewhat limited in determining absolute radiation without knowing the intensity spectrum of the source you are measuring. Apogee instruments has a meter that has a wider sensitivity range and is stated as being able to provide amazing absolute measurements of artificial light sources but costs at least 50 percent more. Other than that the instrument came in a nice case and was simple to operate, and came with a manual that showed the responsivity curve and calibration point.
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