Weights & Measures

Service Company Information

Businesses that "install, service, test or calibrate weights and measures" are required to be licensed. In addition, technician certification is required for individuals who:

1. Test, calibrate, service, or seal a weighing and measuring device
2. Remove an official rejection tag, or
3. Verify the correctness of a device.

Technicians must be recertified every five years.

Publication Links
The Regulation and Safety Section, which includes Weights and Measures, publishes monthly licensed Weights and Measures Service Company directories. You will need a PDF reader to view the documents.

Weights and Measures Service Company Listing – 30 pages PDF
This list identifies service companies and devices they are certified to inspect. Businesses looking for a company to inspect their commercial devices can use this link.

Weights and Measures Technician Listing by Service Company – 86 pages PDF
The technician listing identifies service companies, locations, contact information, and device areas in which they have certified technicians. The list also contains the company’s technician(s) name, seal identifier, device category, and the date their device certification expires.

Weights and Measures Technician Device Certification Listing – 32 pages PDF
The technician device certification listing identifies all certified Wisconsin technicians. This includes the technician’s name, seal identifier, and device certifications.

Wisconsin Administrative Code
Scroll to Subchapter III — Weights and Measures Service Companies, sections 92.20 - 92.24

Wisconsin Statute
Scroll to 98.18 Installing and servicing weights and measures - Prohibited acts; penalty; injunction, section 98.26

Technician Certification with Other States
Wisconsin will register certified technicians that passed exams from Michigan, Minnesota, Ohio and Nebraska within the past 5 years. Service company technicians need to complete and return the Service Company Technician Certification form. This no fee form is available here. Applicants must include proof of registration or a copy of test results if tested outside of Wisconsin.

The states of Michigan, Minnesota, Ohio and Nebraska have us administer an exam on their state laws in addition to the exams on HB 44. You will need to contact these states prior to submitting a Service Company Technician Exam application to DATCP and obtain the following:

• Test preparation materials
• Complete any service company registration requirements for that state(s)

Contact Information

If you have questions, please contact us at DATCPWeightsAndMeasures@wisconsin.gov.