Profile: HF Scientific, Inc. manufactures instrumentation for the measurement of clean water. We offer a comprehensive line of on-line continuous monitoring instruments as well as instrumentation for laboratory and field use. We offer chlorine pocket photometer, chlorine dioxide pocket photometer, PPD-2 DPD reagent dispenser, CLX online residual chlorine monitor, handheld turbidimeter, portable turbidimeter, industrial turbidimeter, streaming current monitor, transmission analyzer, online residual chlorine monitor and test kits.