--- product_id: 32453628 title: "LLC-AI481 TN400 Portable Turbidity Meter, Infrared Sensor, ISO 7027 Compliant, EPA Approved Standard Solutions for Easy Calibration, Accuracy: Β±2%+Stray Light" brand: "apera instruments" price: "$1221.94" currency: USD in_stock: true category: "Apera Instruments" url: https://www.desertcart.us/products/32453628-llc-ai481-tn400-portable-turbidity-meter-infrared-sensor-iso-7027 store_origin: US region: United States of America --- # 0-1000 NTU range Large TFT color screen EPA-approved calibration standards LLC-AI481 TN400 Portable Turbidity Meter, Infrared Sensor, ISO 7027 Compliant, EPA Approved Standard Solutions for Easy Calibration, Accuracy: Β±2%+Stray Light **Brand:** apera instruments **Price:** $1221.94 **Availability:** βœ… In Stock ## Summary > 🌟 Measure with confidence, calibrate with ease β€” never miss a clear moment! ## Quick Answers - **What is this?** LLC-AI481 TN400 Portable Turbidity Meter, Infrared Sensor, ISO 7027 Compliant, EPA Approved Standard Solutions for Easy Calibration, Accuracy: Β±2%+Stray Light by apera instruments - **How much does it cost?** $1221.94 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/32453628-llc-ai481-tn400-portable-turbidity-meter-infrared-sensor-iso-7027) ## 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 - β€’ **Certified Reliability:** CE and ISO 9001:2015 certified with EPA approval, guaranteeing trusted performance in professional environments. - β€’ **Effortless Calibration:** Includes 4 EPA-certified, non-toxic polymer standards with 1-year shelf life for reliable, hassle-free calibration. - β€’ **Intuitive User Interface:** Large, vibrant TFT screen simplifies measurement and calibration, making field and lab use seamless. - β€’ **Continuous Monitoring Mode:** Track turbidity trends in real-time with continuous measurement for repeatability and quality control. - β€’ **Precision Infrared Sensing:** ISO 7027 compliant 90Β° cephalometric method ensures lab-grade turbidity accuracy Β±2%+ stray light. ## Overview The Apera Instruments TN400 Portable Turbidity Meter delivers precise turbidity readings from 0 to 1000 NTU using an infrared sensor and ISO 7027 compliant method. Featuring a large TFT color screen and continuous measurement mode, it’s designed for both field and lab use. Calibration is simplified with EPA-approved, non-toxic polymer standards that have a 1-year shelf life. CE and ISO 9001:2015 certified, this meter ensures professional-grade reliability and accuracy for water treatment, beverage production, and more. ## Description The Apera Instruments TN400 Portable Turbidity Meter is built with an infrared light source, using ISO7207 compliant cephalometric method (90Β°), equipped with a large TFT colored screen, designed for reliable turbidity measurements from 0 to 1000 NTU in various applications both in-field and in-lab e. g. Water treatment, beverage making, etc. The test kit comes with 4 vials of high-molecular polymer turbidity standard solutions (0. 02 NTU, 20. 0 NTU, 100 NTU, 800 NTU), which are EPA approved primary standard for calibration of turbidity sensors that are safe, non-toxic and disposable; NIST traceable to particle size/distribution and optical density, and its inherent stability means it does not settle from suspension. The standards have a one-year shelf life. The convenient submicron polymer suspensions are non-toxic primary calibration standards approved by the U. S EPA for drinking water analysis. The meter is CE certified and comes with a 2-year . ## Features - Infrared sensor β€” ISO7207 compliant cephalometric method (90Β°) - Intuitive operation on a large TFT screenβ€” measure and calibrate at ease - U. S EPA certified, non-toxic polymer standard solutions with 1-year shelf life, easy-to-use - Continuous measurement mode available for observation of repeatability. - CE and ISO 9001: 2015 certified ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01F34Y7L0 | | Batteries | 4 AA batteries required. (included) | | Best Sellers Rank | #92,488 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Lab Turbidity Meters | | Date First Available | May 2, 2016 | | Is Discontinued By Manufacturer | No | | Item Weight | 13.6 ounces | | Item model number | AI481 | | Manufacturer | Apera Instruments | | Product Dimensions | 12.2 x 11.81 x 4.33 inches | ## Images ![LLC-AI481 TN400 Portable Turbidity Meter, Infrared Sensor, ISO 7027 Compliant, EPA Approved Standard Solutions for Easy Calibration, Accuracy: Β±2%+Stray Light - Image 1](https://m.media-amazon.com/images/I/71XM77L41vL.jpg) ## Available Options This product comes in different **Pattern, Style** options. ## Questions & Answers **Q: Is this unit capable of exporting the testing data?** A: No. **Q: Does it come with a wall plug?** A: No **Q: does equipment have spanish language?** A: The instruction booklet we received was in English only. However, operation is very simple. **Q: Hi, we would like to find a #2 sample vials replacement ( Ο†25Γ—60 mm) for the apera instruments tn400. what is the right product to order?** A: TN400-S2 (#1,#2,#3 sample vials, one of each). We have it available on our Apera official website - https://aperainst.com/tn400-s2-sample-vials-set. ## Frequently Bought Together - Apera Instruments, LLC-AI481 TN400 Portable Turbidity Meter, Infrared Sensor, ISO 7027 Compliant, EPA Approved Standard Solutions for Easy Calibration, Accuracy: Β±2%+Stray Light - APERA INSTRUMENTS AI316 Premium Series PC60 5-in-1 Waterproof pH/EC (Conductivity) /TDS (ppm) /Salinity (ppt) /Temp. Multi-Parameter Pocket Tester Kit - APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, Β±0.1 pH Accuracy --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/32453628-llc-ai481-tn400-portable-turbidity-meter-infrared-sensor-iso-7027](https://www.desertcart.us/products/32453628-llc-ai481-tn400-portable-turbidity-meter-infrared-sensor-iso-7027) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-22*