{"product_id":"apera-tn420-portable-white-light-turbidity-meter-epa-1801-compliant","title":"Apera TN420 Portable White Light Turbidity Meter, EPA 180.1 Compliant","description":"\u003cp\u003eThe Apera TN420 (AI482) is a portable turbidity meter designed for water-quality testing using U.S. EPA Method 180.1. It uses a tungsten filament lamp and 90° nephelometric measurement to detect suspended particles in water. Its automatic range switching, five-point calibration, and IP67-rated housing make it suitable for field testing and laboratory checks of source water, filtration systems, and irrigation water.\u003c\/p\u003e\n\n\n\u003cp\u003e• Brand: Apera Instruments\u003cbr\u003e\n• Model \/ SKU: TN420 \/ AI482\u003cbr\u003e\n• Measurement Range: 0–1,000 NTU\/FNU, with automatic range switching\u003cbr\u003e\n• Measurement Method: 90° nephelometric scattering\u003cbr\u003e\n• Light Source: Replaceable tungsten filament lamp, 400–600 nm\u003cbr\u003e\n• Compliance: U.S. EPA Method 180.1\u003cbr\u003e\n• Calibration: Five points — 0, 20, 100, 400, and 800 NTU\u003cbr\u003e\n• Display: TFT color screen; blue for measurement and green for calibration\u003cbr\u003e\n• Battery: Rechargeable 3.7V lithium battery; over 20 hours of continuous use\u003cbr\u003e\n• Protection Rating: IP67\u003cbr\u003e\n• Included Accessories: Six sample cuvettes, calibration standards, silicone oil, microfiber cloth, USB cable, power adapter, and hard-shell carrying case\u003cbr\u003e\n• Warranty: 2 years\u003c\/p\u003e\n\n\n\u003cp\u003eKey Advantage: The TN420 combines EPA Method 180.1-compliant measurement with a replaceable lamp, rechargeable battery, and rugged waterproof housing. Its calibration standards and automatic range switching support consistent turbidity checks when monitoring source water and filtration performance. (Hydro Supply Co.)\u003c\/p\u003e","brand":"Hydro Supply Co.","offers":[{"title":"Default Title","offer_id":68104541405220,"sku":"APRA-AI482","price":755.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0254\/3914\/1924\/files\/portable-white-light-turbidity-meter-compliant-with-epa-180-1-ai482.png?v=1794499914","url":"https:\/\/www.growitdepot.com\/products\/apera-tn420-portable-white-light-turbidity-meter-epa-1801-compliant","provider":"Grow It Depot","version":"1.0","type":"link"}