NEW!
BPI^® UV/Visible Mini Photometer™
The first portable, hand-held photometer!

• Reads UV or visible light transmission percentage.
• Test lenses in or out of frames.
• Powered by a standard 9 volt battery.
• Battery life is about 40 hours with the display on.
• Easy to use. Calibrate, left button for visible, right button for UV.
• It can be calibrated for either 380 or 400nm UV standards.
• A compensation table for lens power is on the back of the unit.
• The unit automatically shuts down after either button release.
• 5.625" long x 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# 19503

BPI^® Photometers are sold with a calibration lens that is traceable back to the National Institute of Standards and Technology. (NIST). Users should regularly check the performance of their meters with these lenses to ensure continuing accuracy.

Our photometers accurately assess the upper portion of the UVA band between 350 and 400nm. All known lens materials when treated with a UV absorber move the natural cut-off of UV light up to 400nm for commercially available lenses made from CR-39® monomer. No UV light is passed in the lower portions of the UVA or UVB range.

BPI® Photometers can be expected to make an accurate assessment of UV transmission because of the characteristics of UV lenses and UV absorbers. When treated with a UV absorber the natural cut-off point is moved into the region of the UVA that the photometer reads best. In an untreated CR-39™ lens, the error of a photometer could be 10% of the UV transmission reading. (A range of 3 to 4%).

This may seem like a large range of error, however it is insignificant because of the amount of UV that is being passed by the lens. The UV transmission is clearly in the ‘Danger’ zone and the actual percentage of transmission is immaterial.

After the lens has been treated with a UV absorber and the UV transmission reading of the photometer is 1, the same error factor applies. Now however, the error may be 10% of a 1% transmission reading. Again the error is insignificant. The lens is clearly in the ‘Safe’ zone. It can be seen that the accuracy of a BPI® photometer improves as the lens being tested approaches 100% UV blocking.

For customers who require photometers that read to the ANSI standard, BPI® also sells units that read lenses to 380nm and gives a percentage transmission reading based on 315nm to 380nm.

* DANGER: More than 13% transmission. CAUTION: 4 - 12% transmission. SAFE: Less than 3% transmission.
** Also available as Luminous Transmittance (Tv) version.
BPI# 119515 (110v)
BPI# 219515 (220v)

BPI^® UV Safety
Analyzer III™

BPI^® UV Economy
Photometer III™

BPI^® UV
Sun Tester™

Set-up kit: Calibration lens. Manual. Patient brochures and stand.

UL Certification. Meets/exceeds CE standards

See BPI Photometer demo

BPI^®
Computer
Cal III™

BPI^® Dual
Computer Cal III™
UV & VISIBLE

BPI^® Transchromatic
Computer Cal III™
UV & VISIBLE

Set-up kit: Calibration lens. Manual. Patient brochures and stand.

UL listed components. Meets/exceeds CE standards

This analyzer has been designed to determine if tinted lenses meet EC standards for traffic signal safety as outlined in ISO 14889, ISO DIS 8980-3 and ISO 13666.

The BPI^® Traffic Signal Safety Analyzer™ is an invaluable aid for quality control of lenses tinted with visible light treatments. The meter may be used for fashion tint control and for critical density adjustments on therapeutic tints such as BPI^® Diamond Dye™ 500/550 and BPI^® Diamond Dye™ 540. It can be used to check for UVA blocking. It may also be used for traffic signal color density and general filter level checks. It has a serial connection for data storage and printing.

FILTER LEVEL LED’S

5 Filter Level LED's are located on the left side.

One LED comes on and stays on. This indicates the filter level that the lens has achieved. (There is no violation of the safety standards).

Flashing LED. As the main display cycles through the colors as they are being analyzed, a LED may change from being steadily lit to flashing. This indicates a safety standard violation. The LED will start to flash as the main display reaches the color that is out of range. As the main display reaches the end of its cycle, the LED stops flashing. It will resume flashing as it reaches the out of range color during subsequent cycles.

NO LED's illuminated. No LED will be lit if the ratio of UV to visible light is too great to meet the standard.

BPI^® Traffic
Signal Spectrum
Analyzer™