About Us

Since 1919, LaMotte has been a committed leader in providing quality equipment and guidance for water analysis. Today, we produce the broadest line of portable test equipment, and continue our focus on your specific needs by offering improved products, strong technical support and the most extensive Custom Test Kit Service in the industry.

Reagents, instruments, and test kits are designed and manufactured at our Maryland facility. Our Research and Development staff is constantly improving our existing products and seeking new methods and reagent packages.

We know that the emphasis we place on Technical Support and Customer Service distinguishes LaMotte from our competitors. I encourage you to call our Technical Support staff for guidance on product selection or assistance with any questions regarding purchased LaMotte products.

If for any reason you are not satisfied with our products or service, you may return the product within 30 days for a full refund; please call for return authorization. We know that when you buy analysis products from us, you purchase solutions to your challenge, not simply hardware.

David LaMotte


Our History


A HistoryOne of LaMotte original test kits of Innovation

In 1919 a young chemist, Frank LaMotte, decided to focus his expertise in the area of pH analysis on specific applications of chemical control. Within a few years, LaMotte's small laboratory in Baltimore, Maryland was manufacturing specialized pH indicators and other analytical reagents for world-wide distribution. The applications section of LaMotte's first major catalog, published in 1930, anticipated many of the areas in which accurate chemical control is indispensable today - boiler water, swimming pools, drinking water, and more.

facilityToday LaMotte Company is located on its own 15-acre industrial park near colonial Chestertown on Maryland's Eastern Shore. The company manufactures analytical reagents, laboratory apparatus, electronic instrumentation, and complete portable test kits for chemical analysis in hundreds of applications.



Our Methods


Visual Colorimetric

A sample is treated with reagent(s) to produce a color reaction. The sample color is then compared against color standards representing known concentrations of the chemical being tested.


Electronic methods generally use a special electrode for measuring a specific test factor. An electrode is immersed into a sample and an amplified current or voltage is produced and translated into a digital readout.

Electronic colorimeters measure the amount of light which travels through the reacted sample, and convert the measurement to a reading as ppm, absorbance or %T. In addition to colorimeters, LaMotte manufactures instruments to test pH, TDS/conductivity, dissolved oxygen, and turbidity.


In a titrimetric method, titrating solution (or titrant) is added to a treated sample until a color change occurs. The volume of titrant required to reach this endpoint reaction is proportional to the concentration of the chemical being used.