Meters

Lab grade instruments designed specifically for growers!

• pH 7 & pH4 calibration solution (50ml bottle each)
• KCL storage solution (10ml bottle)
• Lanyard and user manual

GroStar GS1-E replacement pH electrode

• Replacement GS1 probe measures pH and temperature
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Low-resistance lithium glass membrane
• double junction structure uses blue gel electrolyte without the air bubble 

GroStar GS2 Soil pH Pen

Lab grade instruments designed specifically for growers!pH 7 & pH 4 solution (50ml bottles of each)
• KCL soaking solution (10ml bottle)
• Cleaning brush
• Hole dibber
• Lanyard and user manual

GroStar GS2-E replacement Soil Spear pH electrode

• Spear pH Probe measures pH and temperature in nutrient solution, soil, coco coir, rockwool, and many other media types
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Impact-resistant spear glass tip, 10 times stronger than conventional glass bulb
• PTFE ring prevents a clogged junction caused by soil particles, significantly increases durability
• Backed by Apera's Swiss LabSen proprietary sensor technology

GroStar GS3 EC/PPM/Temp Pen

Lab grade instruments designed specifically for growers!

Features:

• Measures conductivity EC, PPM (500), PPM (700) and temperature
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Titanium alloy sensor designed for high accuracy EC measurement
• Easy-to-use design and fast calibration adjustment.
• Large 3-color backlit screen gives you clear information
• IP67 waterproof rating 
• Replaceable probe
• Powered by AAA batteries with auto off function
• Automatic temperature compensation

GroStar GS3-E replacement EC electrode

• Measures conductivity EC, PPM (500), PPM (700) and temperature
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• Titanium alloy sensor designed for high accuracy EC measurement

Lab grade instruments designed specifically for growers! 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.

GroStar GS4-E replacement pH/EC combo electrode

• Measures pH, conductivity (EC and PPM) and temperature
• Combo probe built with lithium glass membrane and titanium alloy to ensure high accuracy and durability
• Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance
• double junction structure uses blue gel electrolyte without the air bubble 

The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more.

• Measures pH and temperature
• Auto-ranging three point calibration with digital fine tuning
• Includes 4 pH buffer solution in a sponge embedded in a clear cap, so you can see if it's dried up
• Waterproof housing
• Simultaneous temperature display

The PH-80 is an economically priced, reliable pH meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more.