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Standard Solenoids are designed to meet normal environmental and operating conditions encountered in conventional industrial applications: Humidity/Water Splash—Coil area is protected and exposed surfaces plated to withstand occasional water splash and normal in-plant ambient humidity conditions. For continuous high-humidity exposure or water immersion, special encapsulated or molded-coil constructions are available. For extreme environmental conditions, hermetically

The solenoid is energized when current is supplied to the coil.

Natural effects that cause energy output to be less than energy input. While efficiency losses can be minimized with good design, no system is 100% efficient.