Ensure your Thermo Scientific™ Orion™ AQUAfast™ AQ4500 Turbidity Meter has the accessories it needs with our selection of Orion™ AQUAfast™ AQ4500 Turbidity Meter Accessories that include turbidity vials, primary turbidity standards, Formazin turbidity standards, and more. Our Orion AQUAfast AQ4500 turbidity meter has advanced features, including dual light sources and drinking water / wastewater methods approved for U.S. EPA regulatory reporting. Keep pace with changing regulatory protocols; use the White Light LED to comply with EPA 180.1 requirements or Infrared (IR) LED to comply with ISO 7027 requirements. Select from measure modes including EPA 180.1, ISO Nephelometric, ISO Absorbance, % transmittance, EBC and ASBC. This IP67 waterproof meter records 100 data points and offers an average battery life of 2500 hours intermittent use.