Apera Instruments GroStar Series GS1-P pH/ORP Pen Tester Kit with Replaceable Double-Junction pH Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

Apera Instruments GroStar GS1-P pH/ORP Pen Tester Kit is a lab-grade pH/ORP meter designed specifically for growers to easily manage crop success, featuring replaceable double-junction pH and ORP probes and a grower-friendly workflow along with other intelligent functions and features that help reduce the guesswork and give you the confidence in every measurement.

State-of-the-art pH sensor tech The GroStar pH probe is featured with a anti-contamination double-junction reference system and blue gel inner electrolyte along with a lithium glass membrane, allowing you to easily take accurate pH measurement in the long term.The probe is replaceable just so you only need to replace the probe when it reaches its end of life instead of buying a whole new tester.

ORP Probe included for ORP measurement A replaceable double-junction platinum ORP probe is included in this GS1-P kit for you to easily monitor the ORP level of your nutrient solutions.