Unlimited 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 Support
If you have a problem with a Larson Systems product, use our Service Request form to send us an email containing your problem.

Calibration 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
Sending your tester to us is often your lowest cost option, and most repairs are completed and returned in one to two weeks.

Next-Day Service
If you need immediate service, we can accommodate. You will be responsible for travel expenses and per-diem charges.

Rental 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 Replacement Parts
Browse our list of replacement parts for do-it-yourself service.

Support Articles
Browser our list of common support issues.

Discontinued Products
Browse our list of discontinued products for support options and replacement parts.