Apera Instruments GroStar GS3 EC/ppm Pen Tester (Gen II)

Get fast, accurate pH readings.

Apera Instruments GroStar GS3 EC/ppm Pen Tester (Gen2) is a lab-grade meter designed specifically for growers to easily manage crop success, featuring a replaceable conductivity sensor and a grower-friendly workflow along with other intelligent functions and features that help reduce the guesswork and give you confidence in every measurement.

EC/500ppm/700ppm/Temp. All in One
Simply measures EC, 700ppm, 500ppm, and temperature simultaneously with a single tap of the Mode button.

3-color backlit HD display
• White for measurement mode
• Green for calibration mode
• Red for calibration error

Durable Structure
IP67 waterproof and dust-proof rating allows you to use in harsh environment.

Complete Test Kit
The pen comes with a complete set of all the necessary accessories for you to take reliable pH and EC measurement.

Specifications:

Range - 0 to 10.0 EC, 0 to 7000ppm (700ppm), 0 to 5000ppm (500ppm), 0 to 50˚C (32 to 122˚F)
Resolution - 0.1 EC, 10ppm (700ppm), 10ppm (500ppm), 0.1˚C/0.1˚F
Accuracy - ±0.1 EC, ±30 ppm (500ppm), ±40ppm (700ppm), ±1˚C/±1˚F
Temperature Compensation - Automatic
Calibration - EC: Automatic 1-point (2.77EC)
Unit - EC, ppm, ˚C, ˚F
Power Supply - 4 AAA alkaline batteries
Backlight - White (measurement); Green (Calibration); Red (Error reminder)
Waterproof Rating - IP67
EC Probe - Titanium alloy

As a rule of thumb, we recommend calibrating your tester once every 2 weeks. And you can check the accuracy of your tester anytime by simply testing the standard solution and compare the result to the standard value.