---
product_id: 34756289
title: "APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy"
brand: "apera instruments"
price: "KD 24.45"
currency: KWD
in_stock: true
reviews_count: 11
category: "Apera Instruments"
url: https://www.desertcart.com.kw/products/34756289-apera-instruments-ai209-value-series-ph20-waterproof-ph-tester-kit
store_origin: KW
region: Kuwait
---

# Fast 0.1 pH accuracy 2000 hrs battery life Auto temp compensation 32-122°F APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

**Brand:** apera instruments
**Price:** KD 24.45
**Availability:** ✅ In Stock

## Summary

> 📊 Elevate your pH game with precision and portability!

## Quick Answers

- **What is this?** APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy by apera instruments
- **How much does it cost?** KD 24.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/34756289-apera-instruments-ai209-value-series-ph20-waterproof-ph-tester-kit)

## Best For

- apera instruments enthusiasts

## Why This Product

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

## Key Features

- • **Built for the Field:** IP67 waterproof design with rugged case and lanyard for on-the-go professionals.
- • **Endurance That Lasts:** Up to 2000 hours of continuous use powered by included AAA batteries—stay productive without interruptions.
- • **Smart Auto Calibration:** Effortless 3-point calibration with buffer recognition—no guesswork needed.
- • **Precision at Your Fingertips:** 0.1 pH accuracy ensures lab-grade results every time.
- • **Temperature-Adapted Readings:** Auto temperature compensation guarantees accuracy from chilly mornings to hot afternoons.

## Overview

The PH20 Value pH Tester by Apera Instruments is a professional-grade, pocket-sized pH meter designed for diverse applications from hydroponics to environmental monitoring. Featuring fast 0.1 pH accuracy, smart 3-point auto calibration with buffer recognition, and auto temperature compensation (32-122°F), it delivers reliable, repeatable results. Its rugged, waterproof IP67 casing includes a carrying case, calibration buffers, and lanyard, powered by AAA batteries for up to 2000 hours of continuous operation. Certified CE, RoHS, and ISO 9001:2015, it’s the trusted choice for professionals and enthusiasts alike.

## Description

Simply the most reliable pocket pH tester with the best value for general-purpose pH testing e.g. hydroponics, horticulture, pools and spas, water treatment, beverage making, education, environmental monitoring, etc. Up to 3 points of Auto. calibration and 0 to 50˚C Auto temperature compensation (ATC), 0. 1 pH Accuracy with 0 to 14. 0 pH measuring range; Auto. recognition and indication of stable values improves repeatability, saving you the trouble of guessing when to manually hold measurement. PH20 comes with a complete kit of premixed calibration solutions (4.00 and 7.00), 4 AAA batteries, and a lanyard all in a portable carrying case. Smart Self-diagnosis, warning of incorrect buffer solutions and incorrect calibrations. IP67 water-resistant. Up to 2000 hours' operation powered by AAA alkaline batteries. The product is CE and RoHS certified, and is manufactured under an ISO 9001: 2015 certified quality system.

Review: The perfect pH meter - I love this meter. It’s easy to calibrate. The readings are fast and accurate. It reaches a conclusion quickly and will hold the reading after being removed from the solution. The small refillable jars for calibration solutions make this a great little kit. Perfect for the lab or home enthusiast.
Review: Easy to use, calibrate, and clean. - I use this for mead making where pH is an important factor for recipe development at different stages of the process. It’s easy to use, easy to calibrate, easy to read, and easy to clean. Great value for what seems to be a reliable, lab quality product.

## Features

- Easy auto. calibration with buffer recognition; auto. temp. compensation (ATC) ensures accuracy in various temperatures (32 to 122F)
- Backed by Apera quality pH sensor with low impedance, ensuring high response rate
- Comes in a rugged carrying case with pH 4&7 buffers and a lanyard
- Auto recognition of stable values improves consistency, so you don't have to guess when to manually hold measurement
- Up to 2000 hours' continuous operation, powered by AAA batteries

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01ENFOHN8 |
| Age Range (Description) | Adult |
| Batteries | 4 AAA batteries required. (included) |
| Best Sellers Rank | #3,721 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Lab pH Meters |
| Brand | Apera Instruments |
| Color | Regular Kit |
| Date First Available | April 22, 2016 |
| Display Type | Digital |
| Global Trade Identification Number | 00858718006339 |
| Included Components | PH20 Value pH tester kit |
| Indoor/Outdoor Usage | Outdoor |
| Is Discontinued By Manufacturer | No |
| Item Length | 218 Millimeters |
| Item Weight | 3.9 ounces |
| Item model number | PH20 |
| Lower Temperature Rating | 32 Degrees Fahrenheit |
| Manufacturer | Apera Instruments |
| Model Name | PH20 |
| Number of Batteries | 4 AAA batteries required. (included) |
| Outer Material | Plastic |
| Power Source | Battery Powered |
| Product Care Instructions | Hand Wash Only |
| Reusability | Reusable |
| Special Feature | Waterproof |
| Specification Met | CE, ISO 9001, RoHS |
| Style | Regular Kit |
| UPC | 858718006339 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 50 Degrees Celsius |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Apera Instruments
- **Color:** Regular Kit
- **Display Type:** Digital
- **Included Components:** PH20 Value pH tester kit
- **Outer Material:** Plastic
- **Product Care Instructions:** Hand Wash Only
- **Special Feature:** Waterproof
- **Specification Met:** CE, ISO 9001, RoHS
- **Unit Count:** 1.0 Count

## Images

![APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy - Image 1](https://m.media-amazon.com/images/I/71ewDi82t5L.jpg)

## Questions & Answers

**Q: How often does this pH meter need to be re-calibrated and/or how can I tell when it needs to be re-calibrated?**
A: The manufacturer recommends keeping the device probe in a neutral storage solution; the protective tip case/container actually has a 'fill' line for guidance, and it is designed to hold a liquid safely when stored as indicated -- If someone uses distilled or deionized water by itself as a storage solution, the salts contained in the probe tip will dissipate and the probe will then need to be replaced--about $25, plus a fine headache trying to get it right. If you are out of storage solution keeping the probe wet somehow is better than dry--but don't store without the specialized solution for more than a day or so; these are typically $10-$13 for 100ml - 250ml size bottles on Amazon.

**Q: Can anyone confirm if this comes pre calibrated?**
A: Mine was, the PH20 unit. Dead on, but I still did the cal to know how. If you use it for pH 8.0 or lower, the 4.00 and 7.00 solutions are perfect-no need for 10.00 test buffer solution. I am AMAZED at how bad my cheapy meters are, and how they disagree with each other and this one.

**Q: Can this be used to analyze urine?**
A: Yes, it can tests urine with no problem. You can use the probe cap as a container for the urine.

**Q: I will be using this meter once a month. Do I need storage solution for the probe?**
A: Storing the probe in the storage solution helps keep the probe's sensitivity and accuracy. So it's a recommended practice. While storing the probe without any solution will not damage the probe, it's just going to cause the probe to lose its sensitivity and accuracy temporarily. Store the probe in the storage solution again for about 10 minutes, the sensitivity and accuracy can be restored.

## Customer Reviews

### ⭐⭐⭐⭐⭐ The perfect pH meter
*by M***R on January 3, 2026*

I love this meter. It’s easy to calibrate. The readings are fast and accurate. It reaches a conclusion quickly and will hold the reading after being removed from the solution. The small refillable jars for calibration solutions make this a great little kit. Perfect for the lab or home enthusiast.

### ⭐⭐⭐⭐⭐ Easy to use, calibrate, and clean.
*by N***N on December 8, 2025*

I use this for mead making where pH is an important factor for recipe development at different stages of the process. It’s easy to use, easy to calibrate, easy to read, and easy to clean. Great value for what seems to be a reliable, lab quality product.

### ⭐⭐⭐⭐⭐ Excellent. It feels like a lab equipment. Perfect presentation
*by R***E on November 23, 2025*

Es excelente para medir el Ph de agua. Para aquello que quieran medir mas de 9 ph. Ellos son claros que el líquido para su medicion de 14 ph o 12 ph se compra por aparte. En mi caso no pienso medir nada mas allá de 9. También, el equipo trae códigos escaneables que lo llevan a ver videos de Youtube, útiles para la calibración y su uso. It is excellent to do ph measurements. By the way, for those who wants to do measurements above 9 ph levels. They have set in multiple times that the liquid with the 14 ph or 12 ph is sold apart, it is not include. In my case, I am not going to measure more than 9 ph. In addition, the equipment include codes that you can scan to go to their Youtube channel to visualize the calibration steps and a quick review of it (In case you do not want to read all the instructions).

## Frequently Bought Together

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- Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket Tester kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-01-27*