Dwyer Instruments, Inc. As a company, Dwyer Instruments is always looking to continue with the newest innovations. As a leading manufacturer in the controls and instrumentation industry, we continue to grow and serve major markets including, but not limited to HVAC, chemical, food, oil and gas, and pollution control. We are committed to developing and retaining people who bring a passion for excellence. One aspect that never changes is how much we value our employees. Here at Dwyer, employees are an important contribution to the continuing success and more than just a number on a paystub.