Bluelab pH Pen

Take quick pH and temperature measurements of your solution with the Bluelab pH pen!

• completely waterproof
• simple two-point calibration
• 1-year warranty
• automatic shut-off function to extend battery life
• 1 x AAA alkaline battery (included)
• pH measurement range: 0.0 - 14.0 
• accuracy: ± 0.1 at 25°C 

Full technical product specifications here!

The best, most convenient solution for measuring the pH and temperature of your nutrient solution! Plants obtain their nutrients from minerals, but they can receive all the minerals they need only when certain conditions are right. Think of nutrients as a lock. pH is the key. A key factor affecting nutrient uptake is whether your solution is acidic or alkaline. We measure this through pH. The Bluelab pH pen also measures the temperature of the solution, as root health is vital to a successful harvest. Temperature affects the growth rate and structure of the plant, so a solution temperature of 18-22°C is recommended. The Bluelab pH pen offers a compact, quick and convenient way to manage your crop's success and ensure maximum nutrient uptake. Together with the Bluelab Conductivity Pen, you have a convenient, accurate system for ensuring optimal plant growth and health.

• completely waterproof
• simple two-point calibration
• 1-year warranty
• automatic shut-off function to extend battery life
• 1 x AAA alkaline battery (included)
• pH measurement range: 0.0 - 14.0 
• temperature: 0 - 50°C
• accuracy: pH: ± 0.1 at 25°C
• selectable temperature units (C°/F°)
• Backlit LCD display
• built-in pH probe (non-replaceable)
• tick indicating successful calibration
• hold function for recorded measurements
• low battery indicator
• automatic shut-off function