The Fluoride Tracer PockeTester offers direct reading of Fluoride down to 0.1 ppm with Automatic Temperature Compensation (ATC). First Fluoride meter with built-in Automatic Temperature Compensation Fastest response Fluoride meter (<1 min.) Easy use for Field or Laboratory fluoride testing Small sample/TISAB volume required for testing In compliance with EPA Method 340.2 (Potentiometric Ion Selective Electrode) Automatic electronic 1 or 2 point calibration with offset adjustment Memory stores 25 labeled readings Water-resistant to IP54 Large LCD simultaneously displays ppm of Fluoride, Temperature, and analog bargraph indicator Complete with electrode, 20 TISAB reagent tablets, sensor cap, four 3V button batteries, and 48" (1.2m) neckstrap