Check the listing for details. ABB 4690 Turbidity Analyzer Bundle, Water Quality Monitor, Turbidity Sensor. Condition: New – Open box. Listed at 749.50 USD. This turbidity analyzer bundle was used as a demo for an industrial automation distributor for the water and wastewater industry. This bundle features:• ABB 4690/21122211/STD - Analyzer Base• ABB 4690/00012211/STD - Sensor• ABB 7998026 - WL Emitter• ABB 7998027 - WL Receiver Low Range Whichever of the two measurement ranges you choose, low range (0 to 40 NTU) or higher range (0 to 400 NTU), you can benefit from reliable, accurate turbidity measurement with automatic optical cleaning and dry standard calibration verification. • Flow-through turbidity design– Fast response to process turbidity changes due to minimal sample residence time– Compliant to ISO Method 7027 Automatic sensor cleaning– Reduces maintenance requirements– Optimizes performance sensitivity Secondary standards for calibration verification– Accurate, repeatable, safe, simple– Realize significant cost savings by reducing the use of primary standards Simple to use and maintain– Intuitive, user-friendly design– Simple-to-perform annual service Reliable and accurate measurement– Ultralow back scatter for accurate measurement of low turbidity values– Automatic bubble rejection to compensate for erroneous readings due to degassing