Analytical Technology Inc. (ATI), Collegeville, Pa., agreed to acquire Entech Design Inc., a Denton, Texas-based manufacturer of ultrasonic interface level-measurement products used in the water and wastewater treatment industry.

The deal adds sludge blanket level monitoring instruments to ATI’s range of liquid and gas monitors. Entech Design personnel will continue to provide product support from the Denton facility. ATI manufactures water quality monitoring instruments and toxic gas detection products.