General Comments on Photometer... General Comments on Photometer Readings With Non- Plano Lenses BPI Photometers are calibrated using plano (no diopter power) lenses and flats... lenses (regardless of power) seem to give slightly higher readings than their thinner counterparts with the same power. COMMENTS BPI Photometers accurately assess the upper portion... portions of the UV A or UV B range. (See chart above). The BPI Photometer can be expected to make an accurate assessment of UV transmission because of these characteristics of UV...

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of coolant. BPI Lab Chemistry BPI UV/Visible Mini Photometer The first portable, hand-held photometer! Reads UV or visible light transmission percentage. Test either lenses or lenses... 3.25" wide x 3.375" high. 14.3 cm long x 8.2 cm wide x 8.6 cm high. 8.7 oz (with battery). 0.25 kg (with battery). > BPI Photometers BPI Turbo 6 The new BPI system for tinting today...

instruments, photometers, ultrasonic cleaners, edgers (for edging lenses), gradient lensors (for producing gradation of tint on lenses) and ovens for heat and chemical tempering...