Bluelab PH Pen

The Bluelab pH Pen is the industry-standard digital meter for measuring acidity, alkalinity, and solution temperature in hydroponic reservoirs, fertigation mixes, and liquid plant feeds. Maintaining correct nutrient solution pH is essential for preventing nutrient lockout, ensuring crops efficiently absorb nitrogen, phosphorus, potassium, and trace elements for optimal root health and high yields.

Equipped with Automatic Temperature Compensation (ATC), the Bluelab pH Pen adjusts digital readouts dynamically to account for water temperature fluctuations, delivering precise, trustworthy measurements every time. Its clear, backlit LCD screen displays both pH and temperature simultaneously, while a convenient hold function freezes readings on screen so growers can record data without rushing.

Built for demanding grow room environments, the pen features a rugged, water-resistant housing, simple push-button two-point calibration with a 30-day calibration check indicator, and an automatic shut-off feature to conserve battery life. Trusted by commercial cultivators and hobbyists worldwide, it provides the accuracy and durability needed for consistent crop management.

Key Benefits:

• Automatic Temperature Compensation (ATC): Automatically adjusts pH calculations to compensate for liquid temperature variations, ensuring pinpoint accuracy.

• Dual Parameter LCD Display: Backlit digital screen simultaneously displays solution pH and temperature (°C or °F) in low-light environments.

• Simple Push-Button Calibration: Easy two-point calibration (pH 4.0 & 7.0) with an on-screen 30-day calibration tick-mark indicator.

• Hold Reading Function: Freezes the display reading for convenient logging away from the reservoir.

• Water-Resistant & Durable: Built from high-grade materials to withstand daily grow room use and accidental water splashes.

• Battery Conservation Features: Low battery warning indicator and automatic shut-off function maximise battery longevity.

Product Specifications:

• Brand: Bluelab

• Measurement Parameters: pH and Temperature (°C / °F)

• Calibration: 2-Point Manual Push-Button (pH 4.0 and 7.0)

• Display: Backlit LCD

• Water Resistance: Water-Resistant (Do Not Fully Submerge)

• Power Source: AAA Battery Powered with Auto-Off