Sper Scientific Direct

light meter (lux & foot-candles)

ph probe with atc replacement

waterproof conductivity meter (pen style)

waterproof dissolved oxygen meter pen

2-pt. acoustical calibrator - class 2

mini sound meter

replacement wind screen for sound meter

basic ph meter

light meter (foot-candles)

pocket laser power meter

digital wall clock with large led display

type j immersion and general purpose thermometer probe

4-channel datalogging thermometer

4-channel thermometer

sling psychrometer

continuous alarm timer

60-memory stopwatch

large display stopwatch/timer

type j immersion thermometer probe, small

type k ambient thermometer probe