1-877-780-2131
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Service & Support

Regular Business Hours:


8:00 AM - 4:30 PM CST
Monday through Friday
Unlimited Telephone SupportUnlimited Telephone Support: Call toll-free: 1-877-780-2131
During regular business hours, you can almost always be immediately connected with a qualified technician who can answer your questions and solve your problems. There is no limit to calls and no charge to you with our toll-free number.
Unlimited Email SupportUnlimited Email Support
If you have a problem with a Larson Systems product, use our Service Request form to send us an email describing your problem.
Calibration ServiceCalibration Service
We make quarterly trips to most locations in the U.S. Travel costs are shared between customers, so service can be economical, and there is no loss of tester use since it never leaves your site.
Factory Service & Repair Service & Repair
Sending your tester to us is often your lowest cost option, and most repairs are completed and returned in one to two weeks. On-Site Service is also available when you need to minimize downtime.
Next-Day ServiceNext-Day Service
If you need immediate service, we can accommodate. You will be responsible for travel expenses and per-diem charges.
Rental TestersRental Testers
We offer a variety of rental testers for temporary use. There is a weekly rental fee, which includes shipping cost. Contact us first about your service or calibration problem and then ask about the availability of a rental unit.
User Replaceable PartsUser Replacement Parts
Browse our list of replacement parts for do-it-yourself service.
Support ArticlesSupport Articles
Browse our list of common support issues.
Discontinued ProductsDiscontinued Products
Browse our list of discontinued products for support options and replacement parts.

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Larson Systems Inc.
13847 Aberdeen Street NE
Ham Lake, MN 55304
Phone: 763-780-2131
Fax: 763-780-2182
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