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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.

Payment Options

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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  • Conductivity measurement range from 0.0 to 10.0 mS/cm
  • Automatic Temperature Compensation for accuracy between 32 and 122°F
  • Measures EC, ppm 500, or ppm 700 scales
  • 1-year limited warranty
  • View More Details

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Mon to Fri, 9am to 5pm PST

Call (360) 800-5535
  • Free Shipping On Most Items*To the lower 48
  • Transparent PricingBacked w/ price match guarantee
  • 4.8/5 Top Quality Store on Google
  • Secure CheckoutSSL encrypted payments

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Ask Sage about this product
VOLUME PRICING

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

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THROUGH THE Cultivator's LENS Product Evaluation

  • You are checking nutrient concentration daily because you are tired of losing growth progress to minor calibration drifts
  • You are adding a dedicated handheld meter because relying on guessing or aging testers leaves you blind to nutrient burn

  • The factory calibration lets you start measuring immediately, though you should keep the probe clean for accuracy
  • It floats if dropped in your reservoir, which saves the internal electronics from a total loss

  • Growers who swapped to this pen say they stopped seeing unexplained nutrient burn after getting consistent readings
  • Users report they save time by using the simple toggle for EC and temperature instead of swapping between devices

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.

Happy To Help

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

Why Trimleaf

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