Bluelab Conductivity Pen Meter - Measures Conductivity and Temperature

Pocket-Sized EC and Temperature Pen for Daily Reservoir Checks

A quick reservoir check does not always call for a full-sized meter, and the Bluelab Conductivity Pen fits that gap with fast, reliable EC and temperature measurement in a fully waterproof, pocket-sized format. Automatic temperature compensation keeps readings accurate regardless of solution temperature, and a hold-reading function locks the display for easy recording.

The pen arrives pre-calibrated and ready to use out of the box, with selectable conductivity and temperature units and a backlit LCD for low-light conditions.

Key Features & Benefits

• Measures conductivity and temperature — two key nutrient parameters in one compact instrument.
• Automatic temperature compensation — keeps EC readings accurate regardless of solution temperature.
• Fully waterproof — safe to submerge and easy to rinse clean after use.
• Hold reading function — locks the display on the current reading for easy recording.
• Pre-calibrated, ready to use — calibration is optional rather than required before first use.

Who Should Use This

Growers who want a quick, portable conductivity check without the bulk of a full-sized meter, for rapid reservoir checks and daily nutrient verification, are the direct fit for this pen.

About Bluelab Corporation

Bluelab, a New Zealand company with more than three decades in conductivity and pH measurement, positions this pen as its compact, single-parameter EC option.

Frequently Asked Questions

Does this pen also measure pH?

No, this pen measures conductivity and temperature only. For pH, the Bluelab pH Pen or a Combo Meter is the appropriate choice.

Is calibration required before use?

The pen arrives pre-calibrated and ready to use. Periodic verification with Bluelab 2.77 EC standard solution is recommended to confirm ongoing accuracy.

How does automatic temperature compensation work?

It adjusts the displayed conductivity value based on the solution's temperature, so the reading reflects true EC regardless of whether the solution is warm or cold. This removes the need to manually correct readings taken at different times of day.

What battery does this pen use?

One replaceable AAA battery is included with the pen. Replacement batteries are widely available at any hardware or electronics store.