About Lesman Instrument Company

Lesman.com is your one-stop online source for process control instrumentation.

We're committed to working with our customers to discover ways of improving their business results, continuing to provide higher-quality products in less time while saving money and providing safe working environments for their employees. Our services to customers include inventory reduction, vendor reduction, cost analyses, ISO-9000 compliance, and simpler ordering, billing, and shipping methods.

Our philosophy is simple. Our customers aren't satisfied until they are getting everything they expected, and a little more from the products they buy from Lesman.


Lesman Instrument Company serves the instrumentation specialty product needs of industrial customers in the Greater Midwest region, with offices in Chicagoland and the Greater Milwaukee area, plus salespeople in the Greater St Louis, Indianapolis, Greater Peoria IL, and Green Bay WI areas.

Lesman Corporate and Illinois Sales Office

135 Bernice Dr, Bensenville, IL 60106-3366
Call Toll Free: 800-953-7626
Send E-mail to: sales@lesman.com

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Our Wisconsin Sales Office

5160 N 125th St, Butler, WI 53007-1332
Call Toll Free: 800-837-1700
Send E-mail to: wisales@lesman.com

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Lesman's Commitment to Our Customers

Our purpose and values - set in stone

The staff at Lesman is committed to providing service beyond what is expected, and dedicated to improving your business results. Now in our 53rd year of business, we strive to deliver excellent customer service, a consistent, professional, hassle-free way of doing business.

Providing error-free service — at all levels of our organization — is no accident: It involves every employee in every department. To ensure employee empowerment and a commitment to quality, Lesman became an employee-owned company in 1990. All full-time Lesman staff participate as stockholders.

Who better to help you make product selection decisions that support improving your business?

How can Lesman serve you?

  1. All orders are covered by our three-part satisfaction guarantee
  2. All in-stock orders placed by 3pm central time ship the same day
  3. Accounting services that support how you do business: Electronic data interchange, procurement card processing (AmEx, VISA, Mastercard, and PayPal), consolidated billing, paperless invoicing
  4. 24x7x365 access to your company's quotes, orders, packing slips, and invoices through our secure customer portal
  5. Ongoing customer product and technology training, in person and on the web