Home Paramters multiparameters GroStar™ GS4 pH/EC/ Combo Tester

GroStar™ GS4 pH/EC/ Combo Tester



GroStar™ GS4  pH/EC Combo Tester


GroStar™ Premium Pen Testers are designed specifically for the horticultural market. GroStar’s intelligent design reduces the guesswork so you can easily manage your crops success.




Features of GS4 Premium pH Pen:


  • Measures pH, conductivity (EC and 500ppm/700ppm) and temperature (5-in-1)
  • Compatible with all GroStar replacement probes: pH, Soil pH, EC and PH/EC Combo
  • Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
  • Easy-to-use design and fast calibration adjustment
  • Double junction replaceable probe, so you don’t have to discard the entire pen when the probe reaches its end of life
  • Large 3-color backlightscreen gives you clear information
  • Durable structure, IP67 waterproof rating
  • Powered by AAA batteries with auto off function
  • Automatic temperature compensation

Additional information







  • 2-year warranty (instrument)
  • 1-year warranty (probe)
  • pH 7 & pH4 calibration solution (50ml bottle each)
  • 77 EC calibration solution (50ml bottle)
  • KCL storage solution (10ml bottle)
  • Lanyard and user manual



Range 0.0 to 14.0pH,

0 to 10.0 EC,

0 to 7000ppm (700ppm),

0 to 5000ppm (500ppm),

0 to 50˚C (32 to 122˚F)

Resolution 0.1 pH, 0.1EC, 10ppm (700ppm),

10ppm(500ppm), 0.1˚F/0.1˚C

Accuracy ±0.1 pH,

±0.1 EC

±30ppm (500ppm)

±40ppm (700ppm)


Calibration pH: 1 to 3 points (7/4/10); EC: 1 point (2.77 EC)
Temperature compensation Automatic
Unit pH, EC, 500ppm, 700ppm, ˚F, ˚C
Backlight Backlight White (measurement); Green (calibration);

Red (errors)

Power Supply 4*AAA alkaline batteries, up to 1000 hours of


Battery Life Up to 1000 h
IP Rating IP67 (waterproof and floatable)
Successful calibration indicators M (7.00 pH), L (4.00 pH), H (10.01 pH)
Warranty Two years for the instrument, one year for the probe
pH probe Low resistance lithium glass membrane, doublejunction, blue gel electrolyte
EC probe M (2.77 EC)
Successful calibration


Titanium alloy


GroStar GS4 pH EC Pen Tester Brief Manual


Consent Management Platform by Real Cookie Banner
This site is registered on wpml.org as a development site.