The Model 6300 “Five-in-One” multifunction DMM has built-in light level, sound level, and relative humidity and temperature capabilities. Model 6100 is a Category III-600V economy-priced DMM. Both units have “Smart Jacks” that light up to indicate appropriate input and flash and buzz to warn of overload and/or incorrect inputs.

Protek Test and Measurement, 45 Smith St., Englewood, NJ 07631, (201) 227-1161,

protek test and measurment