Profile: Waltron L.L.C. manufactures water quality instruments and potable water chlorinators. The Aqualyzer® series 7040 colorimetric analyzer is based on the patented loop flow analysis (LFA) cycle. It has features such as automatic calibration, short cycle time, automatic dilution when above normal concentration range, and adjustable cycle & calibration frequency. The Waltron Aqualyzer® 9091 dissolved hydrogen analyzer measures low and high concentrations of dissolved hydrogen. It has automatic temperature & flow compensation, analog & digital outputs, and withstands pressure up to 8 bar.