---
product_id: 255568585
title: "AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy"
brand: "apera instruments"
price: "540.33 DT"
currency: TND
in_stock: true
reviews_count: 7
category: "Apera Instruments"
url: https://www.desertcart.tn/products/255568585-ai209-value-series-ph20-waterproof-ph-tester-kit-0-1
store_origin: TN
region: Tunisia
---

# ±0.1 pH accuracy Waterproof design 2000 hours battery life AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

**Brand:** apera instruments
**Price:** 540.33 DT
**Availability:** ✅ In Stock

## Summary

> 💧 Stay sharp, stay precise — pH testing made effortless and rugged.

## Quick Answers

- **What is this?** AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy by apera instruments
- **How much does it cost?** 540.33 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/255568585-ai209-value-series-ph20-waterproof-ph-tester-kit-0-1)

## 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

- • **All-Day, All-Project Ready:** Up to 2000 hours of continuous operation powered by easy-to-replace AAA batteries.
- • **Built to Brave the Elements:** Waterproof construction ensures reliable performance indoors or outdoors, rain or shine.
- • **Smart Stability Recognition:** Auto recognition of stable values with smiley indicator means you never second-guess your data.
- • **Precision that Powers Your Decisions:** Experience lab-grade ±0.1 pH accuracy for flawless measurements every time.
- • **Effortless Calibration, Zero Guesswork:** Auto 1-3 point calibration with buffer recognition keeps your readings sharp and stress-free.

## Overview

The Apera Instruments AI209 PH20 Waterproof pH Tester Kit delivers professional-grade ±0.1 pH accuracy with advanced features like automatic temperature compensation (32–122°F), 1-3 point auto calibration, and stable value recognition. Housed in a rugged waterproof case with included calibration buffers and powered by AAA batteries for up to 2000 hours, it’s engineered for reliable, on-the-go pH testing across horticulture, aquaculture, pools, and more.

## Description

From the manufacturer Features High-sensitivity pH glass membrane Apera's proprietary lithium glass membrane crafted out of 1200˚C rare metal liquid ensures quick and precise pH measurements. Sensor Shield A sensor shield is installed to protect the sensitive glass membrane from accidental damage. Large LCD Display Simultaneous temperature display along with stable reading and calibration indicators. Easy 1–3 point Auto. Calibration Comes with ready-to-use buffers in a rugged carrying case, good for up to 10 times of calibration. Fluid Precision since 1991 Powered by AAA alkaline batteries Accuracy: ±0.1 pH, ±0.5˚C Range: 0 to 14.0 pH. 32 to 122˚F (0 to 50˚C) Auto. Temp. Compensation 1-3 point Automatic Calibration Up to 2000 hours of operation powered by AAA batteries. Self-Diagnosis function automatically tells you what might go wrong during calibration and how to fix. Quick. Simple. Reliable Apera Instruments PH20 Value pH Checker Kit simply provides reliable and quick pH measurements for general water solution applications such as horticulture, pools and spas, beverage making, education, aquarium, aquaculture, water treatment, environmental monitoring, etc. 1–3 point automatic calibration with 32–122˚F ATC Auto. recognition and reminder (a smiley face) of stable readings Low battery alarm; Auto. power off if no operation for 8 minutes Supports switch of pH standard series (USA or NIST) and temperature unit (˚F or ˚C)

Review: Great - Best product, It’s Reliable and Easy to use , Easy to store and carry any place👍
Review: Best - Great brand, precise, u will not need another ph neter in years. One flaw is there tho - at the bottom there is a small cover cap for the sensory glass bubble. That cap is wedged between fork-like spikes. They break easily. So I am using it without that cap cover.

## 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 |
| Additional Features | Waterproof |
| Age Range Description | Adult |
| Age range (description) | Adult |
| Battery Life | 2000 Hours |
| Brand | Apera Instruments |
| Brand Name | Apera Instruments |
| Color | Regular Kit |
| Colour | Regular Kit |
| Connectivity Technology | Bluetooth |
| Customer Reviews | 4.4 out of 5 stars 8,598 Reviews |
| Display Type | Digital |
| Global Trade Identification Number | 00858718006339 |
| Immersion Depth | 1E+1 Centimeters |
| Included Components | PH20 Value pH tester kit |
| Included components | PH20 Value pH tester kit |
| Indoor Outdoor Usage | Outdoor |
| Item Length | 218 Millimeters |
| Item Weight | 3.9 Ounces |
| LowerTemperature Range | 32 Degrees Fahrenheit |
| Manufacturer | Apera Instruments |
| Model | AI209 |
| Model Name | PH20 |
| Number of Batteries | 4 AAA batteries required. (included) |
| Outer Material | Plastic |
| Outer material | Plastic |
| Part Number | AI209 |
| Power Source | Battery Powered |
| Product Care Instructions | Hand Wash Only |
| Resolution | 0.1°C |
| Response Time | 5 seconds |
| Reusability | Rechargeable |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special features | Waterproof |
| Specification Met | CE, RoHS |
| Style Name | Regular Kit |
| UPC | 858718006339 |
| Unit Count | 1 Count |
| Upper Temperature Range | 122 Degrees Fahrenheit |

## Product Details

- **Age range (description):** Adult
- **Brand:** Apera Instruments
- **Colour:** Regular Kit
- **Included components:** PH20 Value pH tester kit
- **Special features:** Waterproof

## Images

![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

### ⭐⭐⭐⭐⭐ Great
*by P***H on 29 December 2020*

Best product, It’s Reliable and Easy to use , Easy to store and carry any place👍

### ⭐⭐⭐⭐ Best
*by A***R on 14 January 2025*

Great brand, precise, u will not need another ph neter in years. One flaw is there tho - at the bottom there is a small cover cap for the sensory glass bubble. That cap is wedged between fork-like spikes. They break easily. So I am using it without that cap cover.

### ⭐⭐⭐⭐⭐ Nauwkeurige goed te bedienen ph meter.
*by M***N on 8 April 2025*

Goed te kalibreren en nauwkeurig in het meten van ph van bijv druiven en appels en peren.

## Frequently Bought Together

- APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy
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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 Tunisia*
*Store origin: TN*
*Last updated: 2026-07-18*