You can buy a low-cost, hand-held, autoranging digital photometer and spotmeter combined into a simple, convenient system. The LiteMate™ III is a fully color-corrected(eye response) and cosine-corrected illuminance photometer. The Model 540 will perform measurements previously associated only with higher priced instruments. You get equivalent accuracy and much more convenience at the lowest possible price.

Combining the SpotMate™ Model 502 with the LiteMate™ gives you a superior spotmeter with a 1° acceptance angle. The SpotMate can be attached to the Model504 LiteMate in a few seconds. You can't afford to be caught needing an important measurement without the right meter. With the LiteMate/SpotMate system you can have them both available at all times.

The LiteMate/SpotMate System 500 is in reality two complete photometric instruments in one. The system provides the capability of both luminance and illuminance measurements under a variety of conditions. The LiteMate can be purchased alone if illuminance is the only requirement.

The system 500 features a high contrast, direct-reading 5½-digit liquid crystal display(LCD) with floating point decimal to prevent reading errors. The correct units are automatically identified by an arrow on the display to further reduce possible reading errors. Another arrow serves as an automatic indicator of low battery condition. The extremely low power drain of the electronics and readout extends battery life through thousands of readings before battery replacement is required. A convenient thumb push-button is the ON control. This button is spring loaded to return to the OFF condition upon releasing thumb pressure. When the button is released, a 12 second hold of the final reading is activated. This 12 second hold allows that "second look" you have often wished you could make to be certain you made the right reading. At light levels below 0.1 foot-candles, where the LCD display maybe unreadable, the 12 second hold allows time to shine a pen-lite on the display to take the reading.

The LiteMate is photopically corrected (to match CIE eye response) and the silicon blue detector is superior in its stability and lack of hysterisis.

The LiteMate III (PR-504) is truly pocket-sized photometer that can be ordered separately. It's a precision autoranging photometer with full color and cosine correction that offers superlative performance at an extremely low price. It's range is from .01 foot-candles to 20,000 foot-candles(0.1 Luc to 200,000 Lux).

The LiteMate/SpotMate System makes taking Task Lighting measurements simple and quick. The target diameter of the SpotMate will be well within ad 8½"x11" rectangle on desk or table tops at distances from 18 inches to 4 feet. These measurements can thus be made at distances that eliminate unwanted shadows. The LiteMate used alone provides illuminance values for the surrounding lighting.

The LiteMate or LiteMate/SpotMate combination goes wherever you go and is instantly ready to make accurate readings to determining compliance to OSHA or other requirements. School rooms, hallways or stairways all end themselves to fast surveys by using the LiteMate.

The 1° angle of acceptance of the SpotMate lets you see what you are measuring. An internal reticle assures no unwanted areas intrude to cause measuring errors. Screen brightness measurements are among the typical reflected brightness applications that are simple and easy with the LiteMate/SpotMate System.

Either the SpotMate, the MicroReader Probe or the Fiber Optic Probe can be used with the LiteMate for luminance measurements of CRTs and other self luminous large-area displays. The Fiber Optic and MicroReader Probes require contact with the display while the SpotMate can be used at distances from 18 inches to infinity.

Distance Target Diameter 1.5 feet (0.46 m) 1.2 inches (30mm) 2 feet (0.61 m) 1.6 inches (40 mm) 2.5 feet (0.76 m) 1.7 inches (42 mm) 3 feet (0.91 m) 2.0 inches (51 mm) 4 feet (1.22 m) 2.4 inches (60 mm) 7.5 feet (2.29 m) 3.0 inches (76 mm) 30 feet (9.14 m) 12.6 inches (320 mm) 100 feet (30.5 m) 42.0 inches (1067 mm)