Test instruments are a crucial part of diagnosing issues in the field, keeping the technician or homeowner safe, and fine tuning equipment. Find the most accurate readings with products like voltage testers, static pressure kits, water hardness strips, infrared thermostats, and pocket thermostats. Items include benefits such as data holding, auto power off, storage and data hold, circular laser targeting, and attached work lights. Shop a wide range of UEi Test Instruments as well as other popular brands like MA-Line and Klein Tools right here at Jackson Systems & Supply.