Skip to content
Apera GS1 pH Pen Tester (Gen II)
Apera GroStar® Series GS1 pH Pen (Gen II) is a premium pH Tester designed specifically for growers to perform professional pH measurements. GroStar's intelligent and grower-friendly design reduces the guesswork so you can easily manage the success of your crops.
FEATURES
● The premium pH probe is built with a double-junction reference system and blue gel inner solution, ensuring quick and accurate pH readings along with a long service life
● Simple workflow and quick 2-point automatic calibration with electrode condition display
● The 3-color backlit LCD screen gives you clear readings in different modes even in a dark environment
● TruRead measurement mode available for taking measurements in multiple locations and automatically displaying the average, minimum, and maximum values of all the readings
● The probe is replaceable, so you don't have to discard the entire pen when the probe reaches its end-of-life
● ORP measurement available with the installation of GS5-E ORP probe (sold separately)
WHAT IS IN THE KIT?
● GS1 pH Pen Tester with Probe
● pH 7, pH 4 Calibration Solution (50ml bottle each)
● 3M KCL Storage Solution (10ml bottle)
● Lanyard & User Manual
