Tektronix J16

The J16 Photometer/Radiometer is a portable unit that only weighs 3.3 pounds, and comes with a shoulder strap and NiCad battery pack so it goes where the light is. Easy to read 3-1/2 digit display and 3 LED's which automatically indicate correct units. Instability is 2% per year and non-linearity is 2% over the entire range (enables single point calibration). Operates from -15?C to +40?C (5 to 104?F) and meets MIL specs for humidity. Wide variety of light probes (sold separately) are available to meet most applications.

Tektronix J16 datasheet & specifications