Fiber optic sensors are well suited for use in the solar industry. The sensors are excellent tools providing real-time data for maximizing system efficiency, increasing equipment utilization, predicting maintenance needs and impending failures. They are passive devices requiring no power and are immune to EMI. They can be multiplexed giving the ability to measure various applications with a single system saving labor and material cost. Fiber optic sensors have a proven record of providing extremely accurate and repeatable data over a long period of time.