---
product_id: 314720729
title: "pH Pen"
brand: "bluelab"
price: "€ 162.07"
currency: EUR
in_stock: null
reviews_count: 5
category: "Bluelab"
url: https://www.desertcart.ie/products/314720729-ph-pen
store_origin: IE
region: Ireland
---

# Auto off & low battery alert Lab-grade glass probe accuracy Auto temperature compensation pH Pen

**Brand:** bluelab
**Price:** € 162.07
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Stay ahead of the curve with precision pH insights!

## Quick Answers

- **What is this?** pH Pen by bluelab
- **How much does it cost?** € 162.07 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/314720729-ph-pen)

## 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

- • **Ready-to-Go Kit:** Includes AAA battery, lanyard, and calibration solution—start testing right out of the box.
- • **Precision pH Mastery:** Lab-quality double junction glass probe ensures pinpoint accuracy for acid/alkaline balance.
- • **Versatile Application:** Perfect for hydroponics, brewing, pools, and drinking water—your all-in-one pH solution.
- • **Effortless Calibration:** Easy two-point calibration with smart reminders keeps your readings flawless every time.
- • **Smart Power Management:** Auto shut-off and low battery indicator maximize uptime and reliability in the field.

## Overview

The Bluelab BLU8000 PENGTB Grower's Toolbox with pH is a professional-grade digital pH meter featuring a durable double junction glass probe for superior accuracy and longevity. Designed for diverse uses including hydroponics, brewing, and water testing, it offers easy two-point calibration, auto temperature compensation, and smart power-saving features. This compact, waterproof device comes complete with essential accessories and a 1-year warranty, making it the trusted choice for growers and professionals seeking reliable, lab-quality pH measurements.

## Description

Bluelab PENPH pH Pen Fully Waterproof Pocket Tester, Easy Calibration, Double Junction Probe for Improved Accuracy and Durability

Review: Me gusto, es fácil de calibrar. Te avisa cuando se necesita calibrar, lo único difícil es conseguir el humectador de sonda. Pero de ahí en más es un gran aparato.🤘🏼
Review: Top du top

## Features

- Measures pH in solution for acid or alkaline conditions to make precise up and down adjustments with lab quality glass probe used for the pool, drinking water, hydroponics, brewing, and growing
- EASY two point calibration and auto temperature compensation makes this digital meter a handy tool with backlit LCD display and calibration reminders
- Double junction probe improves accuracy, reliability, and probe lifespan compared to regular probes, more accurate than comparable pens, test strips and other testing methods
- Other features: auto off function, low battery indicator, units for temperature; KIT INCLUDES: AAA battery, lanyard, and calibration solution
- Made in New Zealand and manufactured by Bluelab, the industry leader in hydroponic testing equipment; 1 Year Limited Warranty with proof of purchase

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005POOJHG |
| Batteries | 1 AAA batteries required. (included) |
| Batteries Included? | Yes |
| Brand | Bluelab |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,784) |
| Date First Available | 9 August 2012 |
| Features | Washable |
| Height | 5 centimeters |
| Included Components | PH Pen |
| Is Discontinued By Manufacturer | No |
| Item model number | pH Pen |
| Length | 21 centimeters |
| Manufacturer | Bluelab |
| Material Type | Glass |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 20.32 x 5.49 x 2.49 cm; 122.47 g |
| Size | Pack Of 1 |
| Style | pH Pen |
| Weight | 0.24 Kilograms |
| Width | 9 centimeters |

## Images

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

## Questions & Answers

**Q: Why should I choose the Bluelab pH pen over others?**
A: The probe quality. Highly accurate, compensates for temp & is fast to a stable reading. It's a double junction probe, so it's durable. And it's full of thoughtful touches (the ring on top, the storage cap, the calibration indicator to name a few).

**Q: Other pens come with a hard carry case & calibration solutions in plastic bottles. Yours does not. Why is that?**
A: Great question. We have made the deliberate choice to make our packaging as sustainable as possible. To that end, our packaging is all fully recyclable, with no hard plastics or styrofoam inserts.

**Q: How does Bluelab make calibration super easy?**
A: Calibrating is an easy & fast process! Each pen includes calibration solutions & clear instructions. A check mark appears when the pen is calibrated. When the pen loses calibration, the check mark disappears, informing you it's time to recalibrate.

**Q: I sometimes see a white crust built up on the end of the pen. What is this?**
A: This is very common in pH meters & is nothing to worry about. The storage solution used to hydrate your pen (and extend its longevity) is potassium salt, which sometimes dries as a white crust on your probe. Simply rinse this away under water.

**Q: Can I use the pH Pen to measure the pH of tap water, distilled water, or reverse-osmosis water?**
A: No. For distilled & RO water there aren't enough dissolved ions (salts) for a stable pH reading. For tap water, w/o sufficient dissolved minerals, the answer is also no. Adding a few drops of KCL storage solution may work to enable a stable reading.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***Z on 19 September 2022*

Me gusto, es fácil de calibrar. Te avisa cuando se necesita calibrar, lo único difícil es conseguir el humectador de sonda. Pero de ahí en más es un gran aparato.🤘🏼

### ⭐⭐⭐⭐⭐ Review
*by L***R on 14 February 2021*

Top du top

### ⭐⭐⭐⭐⭐ Review
*by P***H on 7 March 2024*

Das Produkt funktioniert einwandfrei. Mir hat es die umweltfreundliche Verpackung besonders angetan, kein unnötiges Material verwendet. Alle Infos inklusive Anleitung wurden innen und außen auf die Packung gedruckt. Stark!

## Frequently Bought Together

- bluelab pH Pen - ± 0.1 pH Accurate, Durable Double Junction Probe, Waterproof & Floats, Auto Temperature Compensation, Easy Calibration - Made in NZ
- Bluelab pH 4.0 & 7.0 Calibration Solution Kit - pH Meter & pH Pen Calibration for Balanced Nutrient Solution NIST Traceable | Hydroponics, Gardening & Growing Tents (500 ml/ 16.9 Fl Oz Each)
- 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 Ireland*
*Store origin: IE*
*Last updated: 2026-01-31*