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Level Measurement - ISI Sales

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ISI has built its reputation on delivering state-of-the-art level instrumentation solutions that are more intelligent, more reliable and simpler to install and operate, accelerating your efforts to improve safety, drive efficiency, and grow your business. Engineered for challenging environments, our level instrumentation is designed to meet the needs of space/aerospace, chemical process, power generation, water and waste, food, beverage, life sciences and pulp and paper industries.

SOR Measuement and Control

SOR manufactures high-quality pressure and level-measuring instruments for industrial service, with products suitable for a broad range of safety systems, control processes, and related applications.

Clark Reliance

From engineered boiler trim instrumentation to the varying demands of the process industry, Clark-Reliance is dedicated to supplying the largest and broadest product line in the instrumentation industry and serving as the single-source for all types of level measurement and control.


Level transmitters, using microwave, guided wave radar, ultrasonic, capacitive, and magnetostrictive technologies.

Contact a Dedicated ISI Representative

ISI has developed an extensive product offering through partnerships with industry leading manufacturers. With extensive experience in instrumentation applications, count on us to meet your needs while improving your facility’s operation and efficiency.