INSTRUMENTORS SUPPLY INC (ISI) is the Northwest’s premier supplier of industrial heating supplies, measurement, and process control devices used in industrial manufacturing.

With service throughout the United States, we are dedicated to offering our customers unparalleled technical assistance and customer support.

With top-tier partners, ISI has the right products for your application.

Whether it’s designing a custom process control system, or recommending a simple band heater, ISI is the one-stop source for all your industrial heating supplies, sensor, and process control needs.