Contact Us Thomson Instrument Company representatives are waiting to assist you, please contact us by completing the form below. We’ll get back to you within a business day. For help in the U.S. and Canada, call us toll-free at 800-541-4792. Outside the U.S. and Canada, call us at 760-757-8080. Or Fax us at 760-757-9367 submit contact *indicates a required field.