The SWAN Analytical USA AMI Turbiwell is an EPA-approved noncontact system that uses a white LED method to measure turbidity in potable water, surface water and wastewater. It provides precise readings over a broad 0.000 to 100.0 NTU range. Its optical windows are not in direct contact with the sample, eliminating fouling and time-consuming cleaning. An optional auto-drain feature can further reduce cleaning requirements. Heated optics help avoid condensation that would otherwise introduce errors. The LED light source provides an approximately 100,000-hour operating lifetime; meaning there’s no need for annual tungsten lamp change. Checking performance is easy with an optional VERI-KIT optical prism, providing quick reliable verification. The transmitter features electronic drift stabilization to mitigate drift. 847/229-1290; www.swan-analytical-usa.com