---
product_id: 730760946
title: "Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening"
brand: "bluelab"
price: "R4346"
currency: ZAR
in_stock: true
reviews_count: 7
category: "Bluelab"
url: https://www.desertcart.co.za/products/730760946-bluelab-penph-ph-pen-ph-measuring-instrument-waterproof-digital-payer
store_origin: ZA
region: South Africa
---

# Auto temperature compensation Waterproof & floats if dropped Auto-off & calibration reminders Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening

**Brand:** bluelab
**Price:** R4346
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead in your garden game with precision that floats your boat!

## Quick Answers

- **What is this?** Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening by bluelab
- **How much does it cost?** R4346 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/730760946-bluelab-penph-ph-pen-ph-measuring-instrument-waterproof-digital-payer)

## 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

- • **Smart & Efficient:** Auto temperature compensation and calibration reminders keep your readings flawless.
- • **Precision pH Mastery:** Double junction probe ensures lab-grade accuracy beyond test strips.
- • **Built for the Elements:** Fully waterproof design with floatation—never worry about accidental drops again.
- • **Long-lasting Performance:** Durable build with battery and auto-off features for extended field use.
- • **Complete Hydroponic Control:** Pair with Blue Lab’s soil acidometer and conductivity meter for ultimate nutrient management.

## Overview

The Bluelab PENPH pH Pen is a waterproof, digital pH meter designed for hydroponics, gardening, and water quality inspection. Featuring a double junction probe for precise measurements, automatic temperature compensation, and smart reminders, it offers reliable, professional-grade pH monitoring. Lightweight and durable, it floats if dropped and includes AAA batteries, making it an essential tool for millennial growers seeking effortless nutrient management.

## Description

desertcart.co.jp: Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening : Industrial & Scientific

Review: Good - Good
Review: その他の商品も販売してほしい

## Features

- Measure acidity and alkaline content in liquid, and measure the increase or decrease pH level. Main applications include hydroponic cultivation, gardening, home vegetable gardening, gardening, water quality inspection
- This pH meter has automatic temperature compensation, calibration reminder, auto off function, battery reminder, and temperature measurement. Completely waterproof, durable and designed to float in liquid if dropped
- The double junction protects the probe from contamination and allows for a long life span of the product itself, and allows for a precise p H measurement than the lithomus test paper. Regular cleaning is recommended
- When combined with the Blue Lab's soil acidometer and conductivity meter, you will be able to efficiently manage nutrients in plants and vegetables. AAA batteries (AAA), strap and pH standard solution are included, probe care kit sold separately. Packaging may vary slightly. Instructions are in English
- Designed and assembled in New Zealand by Blue Lab, an industry leader in hydroponics testing equipment. Comes with proof of purchase and a limited 1 year written warranty. Please visit Bluelab website for full terms and conditions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005POOJHG |
| Batteries | 1 AAA batteries required. (included) |
| Batteries Included | Yes |
| Batteries Required? | Yes |
| Customer Reviews | 4.3 4.3 out of 5 stars (4,547) |
| Date First Available | August 9, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 20.3 x 5.5 x 2.5 cm |
| Item Weight | 122 g |
| Number Of Pieces | 1 |
| Part number | PENPH |
| Product Dimensions | 20.32 x 5.49 x 2.49 cm; 122.47 g |
| Volume | 945 Milliliters |

## Images

![Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening - Image 1](https://m.media-amazon.com/images/I/71NiAJy-ZqL.jpg)
![Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening - Image 2](https://m.media-amazon.com/images/I/71vU2IYDj-L.jpg)
![Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening - Image 3](https://m.media-amazon.com/images/I/71oOTeNUWpL.jpg)
![Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening - Image 4](https://m.media-amazon.com/images/I/71vvw6UTTTL.jpg)
![Bluelab PENPH pH Pen, pH Measuring Instrument (Waterproof), Digital Payer Meter, Hydroponics, Water Quality Inspection, Home Gardening - Image 5](https://m.media-amazon.com/images/I/715ityj8IGL.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

### ⭐⭐⭐⭐⭐ Good
*by N***N on February 3, 2023*

Good

### ⭐⭐⭐⭐⭐ Review
*by な***ん on November 26, 2022*

その他の商品も販売してほしい

### ⭐⭐⭐⭐⭐ Review
*by J***Z on September 19, 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.🤘🏼

## 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 South Africa*
*Store origin: ZA*
*Last updated: 2026-03-05*