HannaInstrumentsHannapHep1pH Pen (HI 98107) eco-5523 HannapHep1pH Pen (HI 98107) (eco-5523) pHeppHep , the standard in pH measurement with0.1pHaccuracy, has 2 point calibration, large LCD, pull out replenishable junction and 700 hour battery life. The pHeppHtester ... Details...
HannaInstrumentsHANNAPHEP METER (HI98107) 716840
... pHep meters last much longer. Simply pull out 1-2 mm (1/8") of the junction fiber to completely renew the junction. The pHep offers a Range of 0.0 to 14.0pH and an Accuracy of +/-0.1pH. This tester ... Details...
