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Bluelab

Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow

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Availability: In Stock.
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Arrives Tuesday, Jun 23
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Style: Bluelab Conductivity Pen


Features

  • Conductivity pen can test and monitor your nutrients (TDS) level to maximize your grow and ensure plants get the balanced feed they need; General uses include growing tent, swimming pool, drinking water, aquarium, fish tank, and brewing.
  • This hydroponics tester has ATC that provides consistent reading regardless of any fluctuations in temperature; Durable design for repeated uses and fully waterproof and it floats in any solution.
  • Calibration optional, the meter comes factory calibrated so it's ready to be used; Regular cleaning is recommended for accurate reading; Different units are available (EC, PPM 500, PPM700, and CF).
  • Combine with our pH pens and meters for full garden nutrient monitoring in water and soil; Other features: Auto off function, low battery indicator, units for temperature; KIT INCLUDES: AAA battery, probe care kit is sold separately.
  • Made in New Zealand and manufactured by Bluelab, the industry leader in hydroponic testing equipment, built for grower; 1-Year Limited Warranty with proof of purchase.

Description

The ultimate solution for measuring conductivity!The Bluelab Conductivity Pen is the latest innovation for hand held conductivity meters. It provides a compact, quick and handy way to manage the success of your crops.The Bluelab Conductivity Pen simply tells you that your plants have the right amount of nutrient in your solution and lets you know if adjustments are needed. Display options available in °C, °F, EC, CF, ppm 500 and ppm 700.

Brand: Bluelab


Special Feature: High Accuracy, Large Display, Waterproof


Color: White


Age Range (Description): Adult


Included Components: Geprüftes Bluelab Leitfähigkeitsmessgerät


Specification Met: Factory Calibrated


Display Type: Digital


Unit Count: 1.0 Count


Power Source: Aaa Batteries


Model Name: Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), See more


Additional Features: High Accuracy, Large Display, Waterproof


Display Type: Digital


Power Source: Aaa Batteries


Number of Batteries: 1 AAA batteries required. (included)


Reusability: Reusable


Indoor Outdoor Usage: Indoor, Outdoor


Smart Home Compatibility: Not Smart Home Compatible


Color: White


Style Name: Bluelab Conductivity Pen


Specification Met: Factory Calibrated


EU Spare Part Availability Duration: 1 Years


Unit Count: 1.0 Count


Brand Name: Bluelab


Age Range Description: Adult


Included Components: Geprüftes Bluelab Leitfähigkeitsmessgerät


Model Name: Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700),


Model: PENCON


Global Trade Identification Number: 27


Manufacturer: Bluelab Corporation Limited - Import (NZ)


Warranty Description: One year free repair or replacement guarantee


Part Number: BLU2221


Item Type Name: Conductivity Meter


Item Weight: 0.24 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Fast and accurate
Style: Bluelab Conductivity Pen
Seems very well built superfast reading and very reliable. I’ve been using this one for about a year now with zero issues. It’s so much faster reading than the competitors that I’ve used.
Reviewed in the United States on June 3, 2025 by mark spence
    • Best ppm meter for hydroponics
Style: Bluelab Conductivity Pen
Broke down & bought the more expensive ppm meter, well worth it! Don’t waste your money on several cheaper ppm meters. When ppm levels are apart of your daily grow get this one & you won’t regret it!
Reviewed in the United States on April 6, 2026 by JCARTERS79
    • Simple easy to read.
Style: Bluelab Conductivity Pen
Accurate and stays calibrated
Reviewed in the United States on June 12, 2026 by David L. Warner
    • Blue lab, What else needs to be said?
Style: Bluelab Conductivity Pen
Great products that ar reasonably priced! every Blue lab product I have bought performs excellent. This EC meter is easy to use & Read.It feels like it is well built. you can get a $ 20 meter somewhere else but you will have replace every year or 2 . When dealing with something as important as EC & PPM for your plants or whatever,get the trusted name proven from years of well built products, Blue Lab. ... show more
Reviewed in the United States on March 4, 2022 by Daniel Calles
    • Works great (6/28/2025
Style: Bluelab Conductivity Pen
They claim that this pen is waterproof and as soon as it dropped in the water it floated but stopped working immediately you can see the water in the screen im pissed off this pen cost almost $100 the cheaper brands is so much better i will no longer ever purchase a blue lab product and i don't believe all the reviews this pen sucks New update 2-5-24 - After opening the battery compartment and removing the battery i shaked the pen up and down to remove the water from out of it then i sat it in my warm grow room in front of a small portable heater for 3 days installed the same battery and screwed the top back on and the pen is working correctly as if nothing happened the reason i gave it just 4 stars is because the pen shouldn't get filled with water and become unusable being that the company says there fully waterproof and especially for how much it cost Late Update Sorry: I opened the battery compartment and took it out and i vigorously shaked the pen then i left it opened in front of a small heater in my grow room for a couple days and it works perfectly still to this day with no problems at all although the pen is waterproof water can still get through the cracks through the battery compartment ... show more
Reviewed in the United States on February 1, 2024 by Willie Bridges
    • Amazon verified purchase Amazon verified purchase
Style: Bluelab Conductivity Pen
Review Image by Z Ohana
I was doubtful about spending the money for a ppm pen, but I took the plunge and could not be happier. This pen is very easy to use. You can change the pen to read PPM in the 500 range, 700 range, and EC or Electrical Conductivity. My vegetables leaves were looking very light green, almost yellowish. Once I started using the pen, I was able to adjust my nutrient solution into the proper range and within a couple of days all the leaves started to look healthy with a dark green color. This pen uses one AAA battery. The display also illuminates when you turn the unit on, off, and use the hold feature. I didn't realize it illuminated until I used it early in the morning. Get this pen and happy growing. ... show more
Reviewed in the United States on April 7, 2012 Reviewed in the United States on April 7, 2012 by Z Ohana
    • Best customer service in the business with the best customer support 💪🏻
Style: Bluelab Conductivity Pen
2 years later I started having issues but the company stood by their warranty. Megan from customer support is by far the best customer service person in the business. Overall thrilled with my purchase. If you are on the fence know that you are not only getting great equipment you are getting THE BEST customer support in the business of ph and EC meters. ... show more
Reviewed in the United States on July 22, 2025 by Sara
    • Built to last and Accurate.
Style: Bluelab Conductivity Pen
Highly recommend this accurate and built to last EC/TDS meter. I use this meter daily for monitoring the TDS of hydroponic system and this meter is by far the best. I’ve had numerous other cheap and one 3 in 1 meter in the past and they all stopped working accurately after only a couple of months of use to the point the weren’t able to be recalibrated. The BlueLab EC/TDS meter works without fail every time and it has a replaceable battery!! ... show more
Reviewed in the United States on January 2, 2022 by brandhawaii

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