The SOR pressure switch model 9NN-K4-N4-F1A is a high-performance industrial automation control device manufactured by SOR Inc., a company founded in 1946 and globally recognized for its expertise in pressure, differential pressure, temperature, flow, and level switches. This specific model is engineered for precise pressure monitoring and system protection in demanding industrial environments, including petroleum, chemical, power, metallurgy, pharmaceutical, paper, and food processing industries.

Key specifications include a set point range of 7.03–35.15 kg/cm² with a differential of 0.37 kg/cm², enabling accurate pressure control for critical applications. The switch is constructed with durable materials to withstand harsh conditions and features NPT (National Pipe Thread) connections for seamless integration into standard piping systems. It belongs to the NN series, which offers a wide adjustment range, low deadband performance, and multiple contact options, making it suitable for replacing traditional pressure gauges and directly controlling equipment like pumps and motors.

The model supports universal, weatherproof, and explosion-proof housing options, with NEMA 4, NEMA 4X, IP65, and IP68 protection ratings, and is certified by CSA and CE. It can handle a maximum pressure of 175.77 kg/cm² and is tested at 421.85 kg/cm² for reliability. SOR’s products are known for their robustness, precision, and compliance with international standards, ensuring optimal performance and safety in industrial processes.