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Main image of GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

Alt view image 2 of 7 - GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

Alt view image 3 of 7 - GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

Alt view image 4 of 7 - GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

Alt view image 5 of 7 - GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

Alt view image 6 of 7 - GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

Alt view image 7 of 7 - GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

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GroStar Series GS4-P pH/EC/500ppm/700ppm/ORP 6-in-1 Combo Pen Tester Kit with Replaceable Double-Junction pH/EC Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II

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Lab-grade instrument designed specifically to meet growers' needs and habits
Measures pH, EC, 700ppm, 500ppm, ORP, and temperature with premium probe technologies, ensuring high accuracy and durability with minimal maintenance
Grower-friendly calibration workflow on an HD backlit screen allows you to finish 2-point calibration within a minute

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Replaceable combo probe with double junction pH sensor and titanium EC sensor, ORP probe included for ORP (redox) test
Electrode condition indicator and calibration reminder function help you perform proper maintenance in a breeze

Apera Instruments GroStar GS4-P pH/EC/ppm/ORP Combo Pen Tester (Gen II) is a lab-grade multiparameter meter kit designed specifically for growers to easily manage crop success, featuring a replaceable pH/conductivity combo sensor 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.

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Item#: 9SIC50CKZ50847