The Apera TN500 (AI483) is a portable turbidity meter designed for documented water-quality testing. It uses a tungsten filament lamp and 90° nephelometric measurement to comply with U.S. EPA Method 180.1. Its GLP data logging, automatic averaging, and IP67-rated housing make it suitable for source-water checks, RO water verification, and irrigation-water monitoring.
• Brand: Apera Instruments
• Model / SKU: TN500 / AI483
• Measurement Range: 0.01–1,000 NTU, with automatic range switching
• Measurement Method: 90° nephelometric scattering
• Light Source: Tungsten filament lamp, 400–600 nm
• Compliance: U.S. EPA Method 180.1
• Calibration: Five points — 0, 20, 100, 400, and 800 NTU
• Data Logging: 200 records with timestamps and calibration history
• Data Export: USB connection with Windows PC-Link software
• TruRead Mode: Calculates average, minimum, and maximum from consecutive readings
• Protection Rating: IP67
• Battery: Rechargeable 3.7V lithium-ion, up to 20 hours of operation
• Included Accessories: Five calibration standards, sample vials, silicone oil, microfiber cloth, USB cable, and PC-Link software
Key Advantage: The TN500 combines EPA 180.1-compliant turbidity measurement with GLP records and USB export, supporting repeatable, traceable water-quality checks for irrigation and water-treatment operations.