--- product_id: 272967538 title: "Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket r kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration" brand: "apera instruments" price: "$192.49" currency: USD in_stock: true category: "Apera Instruments" url: https://www.desertcart.us/products/272967538-apera-instruments-ai213-value-series-tds20-waterproof-tds-pocket-r store_origin: US region: United States of America --- # ±1% F.S accuracy IP67 waterproof rating 1000 hrs battery life Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket r kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration **Brand:** apera instruments **Price:** $192.49 **Availability:** ✅ In Stock ## Summary > 💧 Measure Like a Pro, Anywhere, Anytime! ## Quick Answers - **What is this?** Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket r kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration by apera instruments - **How much does it cost?** $192.49 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/272967538-apera-instruments-ai213-value-series-tds20-waterproof-tds-pocket-r) ## 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 - • **Stay Powered, Stay Ahead:** Up to 1000 hours of operation on AAA batteries with smart low-power alerts and auto shutoff. - • **Built to Brave the Elements:** IP67 waterproof design means your TDS20 is ready for any environment, rain or shine. - • **All-in-One Portable Powerhouse:** Complete kit with calibration solutions, batteries, lanyard, and rugged carrying case—ready wherever you go. - • **Precision that Professionals Trust:** Experience lab-grade ±1% full-scale accuracy for flawless water quality insights. - • **Effortless Calibration, Zero Guesswork:** 2-point auto calibration with buffer recognition keeps your readings sharp and reliable. ## Overview The Apera Instruments AI213 TDS20 Pocket TDS meter delivers professional-grade water quality testing with ±1% accuracy, IP67 waterproof durability, and up to 1000 hours of battery life. Featuring 2-point auto calibration, auto temperature compensation, and a large dual-display LCD, it’s a complete portable kit designed for precision and convenience in environmental, agricultural, and aquaculture applications. ## Description Apera Instruments TDS20 Pocket TDS r Kit is built for professional TDS measurement of general water soliutions, including tap water, agriculture, aquaculture, pools& spas, education, environmental monitoring, etc. Range: 0-100.0 ppm, 0-1000 ppm, 0-10.0 ppt (10,000 ppm), Accuracy: ±1% F.S. 1-2 points auto. calibration, 0 to 50˚C auto. temp. compensation. The BPB (Brush-Resistant Platinum Black) sensor adopts Apera's special processing technology, which minimizes electrode polarization, expands measuring range, and increases firmness of the electrode, hence ensuring a much higher accuracy and consistency in a wide-range TDS measurement than traditional stainless steel electrodes, and is easy to clean.The large LCD screen has ppm/temp. value dual display and indications of completed calibrations and stable readings. Practical functions to make your TDS testing easier and more reliable: 2-point auto calibration, 0 to 50˚C auto. temp. compensation. Customizable TDS factor from 0.4 to 1.0. Self-diagnosis with out-of-range and low battery warning.Complete kit: TDS20 meter, 2 bottles of calibration solutions, AAA batteries, and a lanyard all in a portable carrying case. IP67 water-resistant. Up to 1000 hours of use powered by 4 AAA batteries. Low power alarm and auto. power off in 8 min if no operation. The product is CE and RoHS certified, and is manufactured under an ISO 9001:2015 certified quality system. ## Features - Accuracy: ±1% F.S, ±0.5˚C; Range: 0-10,000 ppm (10 ppt) - EASY Auto Calibration with auto buffer recognition; 0 to 50˚C Auto. Temp. Compensation - Large LCD with dual display of temp./ppt, and reminders of completed calibrations and stable readings - Complete kit with calibration solutions, batteries, and a lanyard in a portable carrying case - up to 1000 hours' operation powered by AAA batteries ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01ENFOIN2 | | Item model number | AI213 | | Manufacturer | Apera Instruments | | Product Dimensions | 19.6 x 8.6 x 3.3 cm; 110.56 g | ## Images ![Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket r kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration - Image 1](https://m.media-amazon.com/images/I/61Ao3j-VVrL.jpg) ![Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket r kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration - Image 2](https://m.media-amazon.com/images/I/719hWuT8auL.jpg) ![Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket r kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration - Image 3](https://m.media-amazon.com/images/I/91PyXvrMveL.jpg) ![Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket r kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration - Image 4](https://m.media-amazon.com/images/I/91zXB2cPerL.jpg) ![Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket r kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration - Image 5](https://m.media-amazon.com/images/I/81lEgb3Qi-L.jpg) ## Frequently Bought Together - Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket Tester kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration - APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy - General Hydroponics pH Control Kit For A Balanced Nutrient Solution --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/272967538-apera-instruments-ai213-value-series-tds20-waterproof-tds-pocket-r](https://www.desertcart.us/products/272967538-apera-instruments-ai213-value-series-tds20-waterproof-tds-pocket-r) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-19*