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Bluelab Conductivity Pen with digital display showing 1.2 EC and 70°F, blue tip.
White Bluelab Conductivity Pen with display and buttons surrounded by lush green strawberry plants.
Bluelab conductivity pen with blue tip submerged in dark water with ripples.
Bluelab Conductivity Pen with digital display showing 1.2 EC and 70°F, blue tip.
White Bluelab Conductivity Pen with display and buttons surrounded by lush green strawberry plants.
Bluelab conductivity pen with blue tip submerged in dark water with ripples.
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Bluelab Conductivity Pen - EC & Temp Meter

Official Bluelab Dealer Model: PENCON
$99.00 USD$89.00 USD$99.00 USD
 $99.00 USD
starting from 0% interest financing from /mo.

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Options:Pay in Four, Pay Monthly
Amount:Up to $1,500 (Pay in 4)
Up to $10,000 (Monthly)
Schedule:Bi-weekly to Monthly
Term:6 weeks, 12 or 24 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Finance up to:$4,000
Must apply on a desktop device.
Schedule:Flexible
Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
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  • Measures EC range from 0.0 to 10.0 mS/cm with 0.1 resolution.
  • Features automatic temperature compensation for accurate readings in fluctuating reservoir temperatures.
  • Runs on a single AAA battery and includes a waterproof body that prevents accidental submersion damage.
  • 1-year limited warranty
  • View More Details

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VOLUME PRICING

Commercial & Bulk Purchasing

We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.

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THROUGH THE Cultivator's LENS Hands-On Evaluation

  • You are checking your reservoir daily because inconsistent nutrient strength keeps causing uneven growth across your crop.
  • You are switching to a dedicated handheld meter because relying on strip tests keeps leaving you guessing on EC levels.

  • The fact that it floats is a lifesaver when you inevitably drop the pen into the reservoir during a rush.
  • The simple interface removes the need for constant button pressing, which saves me time during my morning walk-through.

  • Users who swapped out their old, uncalibrated testers say they finally stopped seeing the nutrient burn that plagued them.
  • Growers who track their EC numbers daily report that their feedings are now precise and their overall yield is steadier.

Bluelab Conductivity Pen - EC & Temp Meter

Nutrient burn and stunted growth often trace back to conductivity levels drifting out of range unnoticed. The Bluelab Conductivity Pen keeps that from happening, delivering fast, accurate EC and temperature readings so you can dial in nutrient strength before it becomes a problem.

The pen ships factory calibrated and ready to use immediately — no setup step standing between you and a reading. If you prefer a meter that never requires calibration, the Bluelab Truncheon is an excellent alternative. Automatic Temperature Compensation (ATC) keeps EC values accurate across changing solution temperatures, while a bright backlit display and compact handheld design make it easy to check readings anywhere in the grow room.

Like the rest of Bluelab's handheld lineup, it's fully waterproof and floats rather than sinks if it ends up in your reservoir. Pairing it with a dedicated Bluelab pH Pen rounds out a complete nutrient monitoring system, covering both sides of solution health without extra bulk.

Features

📱
Compact Handheld Design

Sized for convenient one-handed use anywhere in the grow room.

💡
Backlit Display

Bright, easy-to-read screen keeps readings clear in any lighting.

🔢
Multi-Scale Readings

Measures conductivity in EC, ppm 500 (TDS), or ppm 700.

✅
Factory Calibrated

Ready to use out of the box; maintain precision with Bluelab 2.77 EC Standard Solution.

🌡️
Dual Temperature Units

Reads temperature in °C or °F to fit your preferred workflow.

🛟
Waterproof & Floats

Fully waterproof build floats in any solution instead of sinking.

Specifications

Specification Value
Temperature Range 32–122°F (0–50°C)
Temperature Resolution 1°C / 1°F
Temperature Accuracy ±1°C / ±2°F
Conductivity (EC) Range 0.0–10.0 mS/cm
Conductivity (EC) Resolution 0.1
Conductivity (EC) Accuracy ±0.1
TDS (ppm 500) Range 0–5,000
TDS (ppm 500) Resolution 10
TDS (ppm 500) Accuracy ±50
ppm 700 Range 0–7,000
ppm 700 Resolution 10
ppm 700 Accuracy ±70
Operating Environment Nutrient solution, 32–122°F (0–50°C) — do not use or store outside this range
Power 1x AAA alkaline battery

Warranty

The Bluelab Conductivity Pen is covered by a 1-year limited warranty.

Frequently Asked Questions

Does the Conductivity Pen need calibration before use? +

No. It ships factory calibrated and ready to use straight out of the box.

What conductivity scales does it measure? +

It reads in EC, ppm 500 (TDS), or ppm 700, so you can work in whichever scale your feeding program uses.

Does it account for temperature automatically? +

Yes. Automatic Temperature Compensation (ATC) adjusts EC readings for solution temperature, so you get an accurate result without extra steps.

Is the Conductivity Pen waterproof? +

Yes. It's fully waterproof and floats if dropped in a reservoir rather than sinking.

What temperature range can it be used in? +

It operates and reads accurately between 32–122°F (0–50°C). Avoid using or storing it outside this range.

Can I use this alongside a pH meter for full nutrient monitoring? +

Yes. Pairing the Conductivity Pen with a Bluelab pH Pen or the Bluelab pH and Conductivity Starter Pack gives you a complete pH and EC measurement system.

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Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

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