---
product_id: 77640003
title: "Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit"
brand: "apera instruments"
price: "$22"
currency: NZD
in_stock: false
reviews_count: 5
url: https://www.desertcart.nz/products/77640003-apera-instruments-ai209-ph20-value-waterproof-ph-pocket-tester-0
store_origin: NZ
region: New Zealand
---

# ±0.1 pH ultra-precise accuracy Auto temp compensation 32-122°F Waterproof rugged carrying case Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit

**Brand:** apera instruments
**Price:** $22
**Availability:** ❌ Out of Stock

## Summary

> 📊 Elevate your pH game with precision and durability that never quits!

## Quick Answers

- **What is this?** Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit by apera instruments
- **How much does it cost?** $22 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/77640003-apera-instruments-ai209-ph20-value-waterproof-ph-pocket-tester-0)

## 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

- • **Smart Auto Calibration:** Buffer recognition and auto temp compensation guarantee consistent, reliable results across environments.
- • **Built to Brave the Elements:** Waterproof design and rugged case keep your tester safe on any job site or outdoor adventure.
- • **Effortless Stability Detection:** Auto recognition of stable values means no more guesswork—just instant, confident readings.
- • **Long-Lasting Power for Nonstop Use:** Up to 2000 hours of continuous operation powered by included AAA batteries keeps you measuring without interruption.
- • **Precision that Professionals Trust:** Achieve lab-grade ±0.1 pH accuracy for flawless measurements every time.

## Overview

The Apera Instruments AI209 PH20 is a professional-grade waterproof pH pocket tester offering ±0.1 pH accuracy across a full 0-14 pH range. Featuring automatic calibration with buffer recognition, temperature compensation from 32 to 122°F, and a rugged carrying case, it delivers reliable, fast readings with up to 2000 hours of battery life. Ideal for field and lab use, this compact, durable tester ensures consistent, hassle-free measurements wherever precision matters.

## Description

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 47 buffers and a lanyard Auto recognition of stable values improves consistency, so you dont have to guess when to manually hold measurement Up to 2000 hours continuous operation, powered by AAA batteries.

Review: Service from seller in warranty period is satisfactory. - The product is satisfactory/.
Review: Fantastic product - This product is very nice. Using this product for past six month and it's really worthy to the money. I RECOMMENDED THIS 100%

## 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 47 buffers and a lanyard.
- Auto recognition of stable values improves consistency, so you dont 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 |
| Age Range Description | Adult |
| Brand | Apera Instruments |
| Brand Name | Apera Instruments |
| Customer Reviews | 4.4 out of 5 stars 8,492 Reviews |
| Display Type | Digital |
| Global Trade Identification Number | 00858718006339 |
| Indoor Outdoor Usage | Outdoor |
| Item Weight | 3.9 Ounces |
| Lower Temperature Rating | 32 Degrees Fahrenheit |
| Manufacturer | Apera Instruments, LLC |
| Model Name | PH20 |
| Model Number | PH20 |
| Number of Batteries | 4 AAA batteries required. (included) |
| Outer Material | Plastic |
| Outer Material Type | Plastic |
| Part Number | AI209 |
| Power Source Type | Battery Powered |
| Product Care Instructions | Hand Wash Only |
| Reusability | Rechargeable |
| Special Feature | High Accuracy, Waterproof |
| Special Features | High Accuracy, Waterproof |
| Specification Met | CE, ISO 9001 |
| UPC | 858718006339 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 50 Degrees Celsius |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Apera Instruments
- **Outer Material:** Plastic
- **Special Feature:** High Accuracy, Waterproof
- **Specification Met:** CE, ISO 9001

## Images

![Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit - Image 1](https://m.media-amazon.com/images/I/71ewDi82t5L.jpg)
![Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit - Image 2](https://m.media-amazon.com/images/I/71d7RKN4TTL.jpg)
![Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit - Image 3](https://m.media-amazon.com/images/I/61XSnepE-AL.jpg)
![Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit - Image 4](https://m.media-amazon.com/images/I/91tmtx9FnpL.jpg)
![Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, ±0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit - Image 5](https://m.media-amazon.com/images/I/71HW6U9SESL.jpg)

## Questions & Answers

**Q: What is the max ph value we can test?**
A: Hi,
You can test 0-14 PH values (+0.1/-0.10 accuracy)
Thanks

## Customer Reviews

### ⭐⭐⭐⭐⭐ Service from seller in warranty period is satisfactory.
*by H***R on 7 November 2019*

The product is satisfactory/.

### ⭐⭐⭐⭐⭐ Fantastic product
*by A***A on 10 December 2018*

This product is very nice. Using this product for past six month and it's really worthy to the money. I RECOMMENDED THIS 100%

### ⭐ Stopped working after couple of usage
*by H***. on 3 September 2020*

We bought this equipment to check conductivity of water. After using it for couple of times, the instrument stopped working. If you are buying it, be aware that this will not serve you for a long time. Note: REMOVE BATTERIES AFTER USAGE. BATTERIES THAT COME WITH THIS INSTRUMENT LEAKED THE SAME DAY, EVEN WHEN THE INSTRUMENT WAS SWITCHED OFF.

## Frequently Bought Together

- APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy
- General Hydroponics pH Control Kit For A Balanced Nutrient Solution
- 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 New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-04*