It started in 1946 with an enterprising idea. There were leaks in the roofs and plaster walls of buildings in New York City. Building superintendents needed a way to identify them for repair. Enter Bill Delmhorst and his proprietary moisture meter. He sold it to the city, and Delmhorst Instrument Co. was born. Since then, Delmhorst built a reputation for designing, manufacturing and marketing the highest quality moisture meters available on the market. Our commitment to product excellence and superior service began as a mission. Now, it is our hallmark.