LaMotte ORP Tracer PockeTester - 1742 depth-marker-conveys_Feet It measures 9

It measures 9

as do many high schools

This Taylor Phenol Red is one essential component needed for your pool's test kit

This is a PVC Schedule 80 Union with Slip x Slip connections measuring 1 inch

LaMotte ORP Tracer PockeTester - 1742 depth-marker-conveys_Feet It measures 9This ORP Tracer PockeTester measures ORP from 999 to 999 mV with an accuracy of plus minus 4 mV. A memory feature saves calibrations between sensor changes and stores up to 15 readings. This PockeTester also allows you to add a TCI (Chlorine) and or pH sensor so you can test three factors (sold separately). The rugged flat surface electrode will alert user when it's time to RENEW. A CAL indicator shows when to recalibrate and user can select a 1, 2,