
Where it Began
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.

Where we are today
Since then, Delmhorst has built a reputation for designing, manufacturing and marketing the highest quality moisture meters available on the market for a variety of industries. Every Delmhorst product is assembled in the USA, and is supported by our industry-leading warranty. Our commitment to product excellence and superior service began as a mission. Now, it is our hallmark.
Our meters provide consistent, accurate readings about the moisture level of your product. Whether you choose pin-type, or pin-free, the meters provide valuable information you need to make critical decisions.

Our mission
To provide top-class tools and service
Beyond providing best-in-class tools for detecting moisture, Delmhorst is committed to supporting all our customers—both end users and distributors. Delmhorst offers numerous exclusive promotional and educational materials to help our distributors provide top-notch service to their own customers. We also offer an industry-leading U.S. based customer support team to help troubleshoot moisture meter issues and provide tips for getting more out of your Delmhorst products.
Our Experience
79+
Years Experience
100+
Countries
22+
Industries
Supporting Distributors Around The World
Led by John and Tom Laurenzi, today, we serve more industries than all of our competitors combined, and are recognized as the market leader in each of those industries. Our moisture meters are widely beneficial to a variety of applications, for example:
Products by Industry
Building Trades
Meters are essential for every building inspector. Test moisture levels in wood, drywall and many hygroscopic building materials with a variety of pin and combination pin/pinless meters and thermo-hygrometers.
Building Trades
Meters are essential for every building inspector. Test moisture levels in wood, drywall and many hygroscopic building materials with a variety of pin and combination pin/pinless meters and thermo-hygrometers.
Water Damage Restoration
Restoration companies are asked to tackle challenges in a wide variety of situations—this means they need versatile tools they can rely on to perform day in and day out. Delmhorst offers a great selection of restoration-focused moisture meters, thermo-hygrometers, and accessories that are invaluable for restoration experts.
Water Damage Restoration
Restoration companies are asked to tackle challenges in a wide variety of situations—this means they need versatile tools they can rely on to perform day in and day out. Delmhorst offers a great selection of restoration-focused moisture meters, thermo-hygrometers, and accessories that are invaluable for restoration experts.
Lumber/Woodworking/ Flooring
Moisture content is the key to quality! Whether you’re a lumber producer, woodworking manufacturer, or hardwood flooring installer, accurate moisture measurements are crucial for maximizing product quality. Delmhorst wood moisture meters help you get fast and accurate moisture measurements in wood and flooring products.
Lumber/Woodworking/ Flooring
Moisture content is the key to quality! Whether you’re a lumber producer, woodworking manufacturer, or hardwood flooring installer, accurate moisture measurements are crucial for maximizing product quality. Delmhorst wood moisture meters help you get fast and accurate moisture measurements in wood and flooring products.
Paper
Moisture control is critical in all aspects of paper product manufacturing. Whether you’re testing kraft, corrugated, cores or bales, in stacks or on a moving web, we have a meter and special application electrode to meet your needs.
Paper
Moisture control is critical in all aspects of paper product manufacturing. Whether you’re testing kraft, corrugated, cores or bales, in stacks or on a moving web, we have a meter and special application electrode to meet your needs.
Agriculture
Farmers know that one of the most important factors in producing high-quality crops is to carefully monitor moisture at harvest and during storage. Delmhorst moisture meters help farmers manage moisture content to ensure better yields, improve quality and maximize profits.
Agriculture
Farmers know that one of the most important factors in producing high-quality crops is to carefully monitor moisture at harvest and during storage. Delmhorst moisture meters help farmers manage moisture content to ensure better yields, improve quality and maximize profits.
Leather
Leather production requires that moisture is closely monitored. Using a high-quality leather moisture meter will help minimize costly problems such as product waste, re-work, and increased production costs.
Leather
Leather production requires that moisture is closely monitored. Using a high-quality leather moisture meter will help minimize costly problems such as product waste, re-work, and increased production costs.
Temperature/Relative Humidity
Accurate and reliable measurements of environmental conditions are critical on the job site, in manufacturing plants, and in numerous industrial applications from HVAC to food processing and pharmaceuticals.
Temperature/Relative Humidity
Accurate and reliable measurements of environmental conditions are critical on the job site, in manufacturing plants, and in numerous industrial applications from HVAC to food processing and pharmaceuticals.
Water Damage Restoration
When disaster strikes, the financial and emotional damage can be devastating. That’s why moisture meters are so critical in restoration work. Delmhorst moisture meters have saved contractors and their homeowner clients thousands of dollars and countless hours in finding the extent and precise location of water damage.
Agriculture
Keeping hay at proper moisture levels is key to maintaining its nutritional value, preserving its leaves, and reducing the chances of mold development and spontaneous combustion. Delmhorst moisture meters keep track of those critical levels—and help hay growers produce the highest quality hay.
Lumber/Woodworking/ Flooring
A Delmhorst moisture meter is an ‘inexpensive insurance policy’ for flooring installations. It keeps contractors fully informed about the moisture level, minimizing the chances of defects, such as cracking, cupping and warping—avoiding costly callbacks.