--- product_id: 255568585 title: "AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy" brand: "apera instruments" price: "$155.21" currency: USD in_stock: true reviews_count: 7 url: https://www.desertcart.us/products/255568585-ai209-value-series-ph20-waterproof-ph-tester-kit-0-1 store_origin: US region: United States of America --- # ±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:** $155.21 **Availability:** ✅ In Stock ## Summary > 💧 Stay sharp, stay precise — pH testing made effortless. ## 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?** $155.21 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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 - • **Long-Lasting Power:** Up to 2000 hours of continuous use powered by included AAA batteries—stay productive longer. - • **Ready for Any Task:** Comes complete with rugged carrying case, pH 4 & 7 buffers, and lanyard for ultimate convenience. - • **Effortless Calibration:** Auto buffer recognition and temperature compensation guarantee consistent, reliable results. - • **Built to Brave the Elements:** Waterproof construction lets you test confidently indoors or outdoors without worry. - • **Precision at Your Fingertips:** Experience lab-grade ±0.1 pH accuracy for flawless measurements every time. ## Overview The Apera Instruments AI209 PH20 Waterproof pH Tester Kit delivers professional-grade ±0.1 pH accuracy with auto calibration and temperature compensation. Designed for durability and ease, it features a waterproof build, fast 5-second response, and up to 2000 hours of battery life. Ideal for horticulture, aquariums, pools, and environmental monitoring, this kit includes essential buffers and a rugged case, empowering you to measure with confidence anywhere. ## Description 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. ## 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 | |---------------|-------| | Additional Features | Waterproof | | Age Range Description | Adult | | Asin | B01ENFOHN8 | | Battery Life | 2000 Hours | | Brand Name | Apera Instruments | | Color | Regular Kit | | Connectivity Technology | Bluetooth | | Customer Reviews | 4.4 4.4 out of 5 stars (8,624) 4.4 out of 5 stars | | Display Type | Digital | | Global Trade Identification Number | 00858718006339 | | Immersion Depth | 1E+1 Centimeters | | 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 | | Part Number | AI209 | | Power Source | Battery Powered | | Product Care Instructions | Hand Wash Only | | Resolution | 0.1°C | | Response Time | 5 seconds | | Reusability | Rechargeable | | Specification Met | CE, RoHS | | Style Name | Regular Kit | | Unit Count | 1 Count | | Upc | 858718006339 | | 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 on Reviewed in the United Arab Emirates 29 December 2020* Best product, It’s Reliable and Easy to use , Easy to store and carry any place👍 ### ⭐⭐⭐⭐ Best *by on Reviewed in the United Arab Emirates 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 on Reviewed in the Netherlands 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 - 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. 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