CL17 Free Residual Chlorine Analyzer

This is a review of Hach's new Cl-17sc free/total chlorine monitor, a replacement for the legacy Cl-17. Overall, the equipment performs well. The Cl-17sc has a smaller enclosure that takes less space for mounting. The are more options for the display, but the display is no longer integrated into the unit - an SC200 or newer SC4500 controller must be paired to the unit for control and display, adding another expense. The Cl-17sc can be connected to some other companies' controllers, but I am not sure how well that works. This newer model also requires the identical reagent kit. The equipment is dependable and holds calibration well. However, there are caveats. In speaking with Hach's field service representative, he informed me that the newer model is much more dependent on electronic internals than the older model. Preventative maintenance will be a bit pricier as a result. This does allow greater versatility, and allows more devices to be simultaneously interconnected, yet it also makes the Cl-17sc more sensitive to heat and humidity. Readings from a remote control or remote sensor may be slightly affected as a result.

Review Date: 25 Oct 2024 | Hach Company