---
product_id: 5572299
title: "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"
brand: "bluelab"
price: "€ 183.59"
currency: EUR
in_stock: true
reviews_count: 13
category: "Bluelab"
url: https://www.desertcart.hr/products/5572299-pencon-conductivity-pen-and-digital-tds-meter-water-tester-temperature
store_origin: HR
region: Croatia
---

# Instant nutrient readings Waterproof & floats Auto temperature compensation 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

**Brand:** bluelab
**Price:** € 183.59
**Availability:** ✅ In Stock

## Summary

> 🌿 Grow smarter, not harder — the ultimate nutrient watchdog for your plants!

## Quick Answers

- **What is this?** 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 by bluelab
- **How much does it cost?** € 183.59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/5572299-pencon-conductivity-pen-and-digital-tds-meter-water-tester-temperature)

## Best For

- bluelab enthusiasts

## Why This Product

- Trusted bluelab brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Fully waterproof design that floats, perfect for repeated use in any water-based environment.
- • **Ready Out of the Box:** Factory calibrated with optional recalibration and easy maintenance for reliable performance.
- • **Versatile & Compatible:** Ideal for hydroponics, aquariums, pools, and more; pairs seamlessly with Bluelab pH meters.
- • **Precision Nutrient Monitoring:** Maximize your grow with ultra-fast, accurate TDS, EC, CF, and PPM readings.
- • **Temperature-Resilient Accuracy:** Advanced ATC technology ensures consistent readings despite temperature fluctuations.

## Overview

The Bluelab PENCON Conductivity Pen is a professional-grade digital TDS meter designed for precise nutrient and temperature testing in hydroponic systems and indoor gardening. Featuring instant readings, waterproof durability, and automatic temperature compensation, it ensures your plants receive perfectly balanced nutrients. Factory calibrated and easy to maintain, this versatile tester supports multiple units (EC, CF, PPM 500/700) and is trusted by growers worldwide.

## Description

desertcart.com: 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 : Patio, Lawn & Garden

Review: Fast and accurate - 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.
Review: Good quality - Easy to hold and use.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005IGXOK4 |
| Batteries | 1 AAA batteries required. (included) |
| Best Sellers Rank | #28,213 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Lab Multiparameter Meters |
| Date First Available | August 14, 2011 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.84 ounces |
| Item model number | PENCON |
| Language | English |
| Manufacturer | Bluelab Corporation Limited - Import (NZ) |
| Product Dimensions | 9.8 x 2.2 x 1.3 inches |

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/71csSQrRF9L.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Does this pen really have to be calibrated?**
A: These are great pens for the hobbyist just remember when you do not see the check mark on your pH pen or on your PPM EC conductivity bluelab pen it is time to calibrate if you do not see this check mark displayed on either pin on the screen calibrate. I also recommend using the 7.0 bluelab calibration solution followed up by the 4.0 bluelab calibration solution to get a more accurate reading of the pH solution. Also use blue lab calibration solution for your conductivity meter as well these meters will last a very long time I had mine for almost 4 years and still in good shape keep your meters clean keep your pH bulb moist in store in the pH storage solution that is made by blue lab. Never let the bulb go dry if you do it will take 24 hours or it is good to give 24 hours to rehydrate your pH bulb. And if I'm not mistaken on the bottles the calibration solution of either your conductivity meter solution for calibration or your pH pen calibration solution it says on the bottle after opening don't use after three months I don't know if this matters a whole lot or not but I've used my solution over three months plenty of time and no noticeable difference in this. I guess the main thing is to keep your pH pen glass bulb hydrated I believe that this is probably the most important thing when owning a blue lab pH testing pin. If there is anyone to add to this conversation or to give me any advice that's positive please do so I am always willing to learn and listen so please if anyone has any experience with these pins other than me and something that I may not have mentioned or know please tell me or leave a review thank you I hope this has been helpful. And please stay positive with positive feedback just remember people there are no stupid questions and no mistakes only lessons thank you.

**Q: What is ec have to do with my indoor medical grown cannabis plant?**
A: The EC is an indirect measure of the fertilizer salts contained in the substrate, so those target levels will also vary at different growth stages. By starting an in-house nutrient monitoring program and measuring the EC, you can make sure that sufficient levels of fertilizer are available to the plants.

**Q: Mine wont read tap water, right out of the box. Is it defective?**
A: Sure

**Q: Description is contradictory - is this pen ec, ppm (500 & 700), ph and temperature? seller confirm please**
A: No ph

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fast and accurate
*by M***E on June 3, 2025*

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.

### ⭐⭐⭐⭐⭐ Good quality
*by B***Y on August 24, 2025*

Easy to hold and use.

### ⭐⭐⭐⭐⭐ Accurate and easy to use
*by D***S on July 21, 2024*

Have had cheaper pens that have not lasted even with careful use. This pen has lasted through two seasons of almost daily use. Very accurate - hits test solutions perfectly. The extra money spent is worth it unless you like replacing pens every year.

## Frequently Bought Together

- 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
- bluelab pH Pen - ± 0.1 pH Accurate, Durable Double Junction Probe, Waterproof & Floats, Auto Temperature Compensation, Easy Calibration - Made in NZ
- Bluelab STSOL120 KCL Storage Solution 120ml pH Probe and Pen, Maintain Meters Used for Water, Soil, and Hydroponic System or Indoor Plant Grow White

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-07*