Jenco Instruments was founded by Mr. John Jen over 40 years ago on the idea that advances in semiconductor chips and circuit boards can play major roles in miniaturizing water quality instruments while increasing ease of use, features and accuracy. That idea led to the creation of the very first portable digital pH meter and was sold under Cole-Parmer's private brand.
Today the same innovative spirit is prevalent in our line of water quality instruments which now spans pH, ORP, conductivity, dissolved oxygen, ion and temperature meters, testers, portable, benchtops and online analyzers. Though Jenco remains a family owned business and is small compared to consolidated multinational corporations, it is proud that its products can be found in research facilities, universities, manufacturing facilities, municipalities and homes all over the world. The EPA, NASA, Anheiuser-Busch, Craft Foods and thousands of other companies trust their water quality readings to Jenco.
