Water & Waste Water 

Control Systems

P.O. Box 318, Towanda, IL 61776 | 815-515-9599



Want an expert to help get you going?

STELTEC and our technical sales reps can provide expert on-site start-up service for HL Series Controllers.


Having problems?  We can help!

STELTEC provides technical support and troubleshooting for its own products, as well as legacy StrantrolĀ® controllers.

Maintenance Products

We are a one-stop shop for your controller's consumable products.  We carry replacement sensors, buffer solution, and sensor clean solution.


Broken controller?  Send it in.

We offer equipment diagnostics and repairs though our subsidiary, SL-Tech.

Please contact us for more information.

Strantrol is a registered trademark of Siemens.