Sper Scientific Meters | pH, Conductivity, TDS, ORP, Temperature, Humidity sper scientific, sperscientific.com, technika, heat stress meters, heat index meters, WBGT meters, IAQ meters, light meters, ph meters, ph meters, sound meters, water quality, decibel meter,db meter, lab equipment, ir thermometers, refractometer, digital thermometer, high low thermometer, min max thermometer, digital temp, temperature gun, environmental, measurement, geophysical, testing For over 25 years, Sper Scientific has been committed to being the leading supplier of environmental measurement instruments by providing the most reliable, high-quality analytical devices, with an unparalleled focus on customer value. Customers use Sper Scientific measurement instruments to maintain EPA and OSHA compliance, and strict lab standards.