Verdict overview
- lasts a long time 7.9
- worth the money 7.6
- Precision 8.6
- Simple to use 8.6
- clearly written 9.6
Pros
Highly accurate readings for various applications.
Durable and waterproof design for repeated use.
Comes factory calibrated and easy to use.
Cons
Inaccurate, cannot calibrate.
Tech specs
| product dimensions | 9.8 x 2.2 x 1.3 inches 3.84 ounces |
| batteries | 1 AAA batteries required. included |
| language | English |

Product Overview
I recently had the pleasure of testing out the Bluelab PENCON Conductivity Pen and Digital TDS Meter. This is a great tool for hydroponic growers, as it allows you to test and monitor your nutrient levels to ensure that your plants are getting the balanced feed they need. The pen can be used in a variety of settings, including grow tents, swimming pools, drinking water, aquariums, fish tanks, and brewing. Its also fully waterproof and floats in any solution.
One of the most impressive features of this pen is its accuracy. The meter comes factory calibrated so its ready to use right out of the box. It also has Automatic Temperature Compensation ATC which provides consistent readings regardless of any temperature fluctuations. The readings are also quite easy to read due to its clear digital display.
The pen is also designed for durability and repeated uses. The body is made from high quality materials that are designed to last for many years with proper care and maintenance. Regular cleaning is recommended to ensure accurate readings over time. Additionally, the pen comes with a low battery indicator and automatic shut off function for added convenience.

The Bluelab PENCON Conductivity Pen is an excellent tool for any hydroponic grower looking to monitor their nutrient levels and maximize their yields. Its easy to use and provides accurate readings that are easy to read on its digital display. Plus, its backed by a two year limited warranty so you can be sure that youre getting a quality product that will last for many years with proper care and maintenance.
Overall, I highly recommend the Bluelab PENCON Conductivity Pen and Digital TDS Meter for anyone looking for an affordable yet reliable way to monitor their nutrient levels in hydroponic systems. With its factory calibration, ATC feature, durable design, and two year limited warranty this is one of the best products on the market today!
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