Bluelab Pens

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Bluelab Pens – Precision Meters for Every Grower

The Bluelab OnePen™ combines advanced sensing technology with everyday simplicity – giving growers of all levels accurate pH, EC, and temperature readings in one compact device.

Measure pH, EC, and temperature with a single pen
Designed for hydroponic, soil, and water culture grows
Waterproof, durable build for lab and field use
Simple calibration with Bluelab calibration solutions
Trusted by commercial and home growers worldwide

Explore the full range of Bluelab Pens below and find the right meter for your grow operation.

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