Bluelab pH Pen — Compact pH & temperature meter

The Bluelab pH Pen is a handheld meter for quick, accurate pH and temperature readings in nutrient solutions, helping ensure optimal nutrient uptake and crop health.

• Measures: pH and temperature
• Probe: double‑junction pH probe for reliable accuracy
• Calibration: simple 2‑point pH calibration with a 30‑day reminder
• Display: bright, easy‑to‑read backlit screen
• Units: temperature in °C or °F
• Durable: waterproof and buoyant — floats in solution
• Portable: compact ergonomic design for convenient use; pairs with the Bluelab Conductivity Pen for a complete measurement system