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Pressure Switches including Low Pressure Switches, High Pressure Switches and Pneumatic Switches from Neo-Dyn.

A negative rate type pressure switch (i.e., a Belleville spring) is a snap acting device. At a certain pressure (apex of the spring curve) the spring snaps over center. At this point, it takes pressure (force) to continue its movement. The pressure switch set point is a function of the Belleville spring. The electrical switch is in a fixed position and is synochronized to the movement of the Belleville. Our Neo-Dyn switches feature a negative rate Belleville spring snap acting device which offers greater set point stability, vibration resistance, over-pressure capability and cycle life.

Although, our standard product line is among the broadest in the industry; Pressure Switches Hazardous Area, Vacuum Switches General Purpose, Vacuum Switches Hazardous Area, Differential Switches General Purpose, Differential Switches Hazardous Area, Temperature Switches General Purpose, Temperature Switches Hazardous Area, Sanitary Switches and our Switch Accessories. If you do not see what you want, please submit your request (link below) and our customer-support and engineering staff will work with you to provide a switch, ideally suited to your application.

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Pressure Switches General Purpose

General Purpose and Hazardous Area switches are catagorized by NEMA standards. Click on either the product image or the product description to view the switch datasheet.

100P NEMA 4 & 13	Series Pressure Switch/Internal Adjustment. The 100P (diaphragm sensor) for pneumatic and low impulse hydraulics up to 3,000 psig system pressure. Enclosure 3.
101P NEMA 4 & 13	Series Pressure Switch/External Adjustment. The 101P (diaphragm sensor) is for pneumatic and low impulse hydraulics up to 3,000 psig. Enclosure 3.
105P/105PP NEMA 1 & 2	Series Tamper Proof Pressure Switch. These all purpose miniature switches are of extremely light weight and durable construction. Small size improves vibration and shock resistance. Enclosure 2 or 5.
110P NEMA 4 & 13	Series Pressure Switch/Internal Adjustment - This weather-proof design for low pressure applications. Enclosure 3.
115P/115PP NEMA 4 & 13	Series Pressure Switch/Tamper Proof. This compact and versatile pressure switch with built to order set points is fully tamper proof. Excellent set point stability and vibration resistant design for weather proof application. Enclosure 3.
125P NEMA 4 & 13	Series Pressure Switch/Tamper Proof. Designed for high pressure pneumatic or low impulse hydraulic applications requiring a narrow deadband. Suited to weather proof application. Enclosure 3.
130P NEMA 4 & 13	Series Pressure/Vacuum Switch is a compact versatile pressure/vacuum switch is suitable for numerous applications serving low to mid-range pressure applications. Enclosure 3.
131P NEMA 4X & 13	Series Pressure/Internal Switch (Weather Proof) is a compact adjustable pressure switch for high pressure pneumatic and low impulse hydraulic process applications. Enclosure 3.
132P NEMA 4 & 13	Series Pressure Switch/Internal Adjustment. Compact adjustable switch for pneumatic or low impulse hydraulic process applications. Excellent set point stability and vibration resistance. Enclosure 3.
142P NEMA 4 & 13	Series Ultra Low Vacuum/Pressure Switch. Ultra low pressure and vacuum to pressure crossover (142P) and features many applications with a wide range of internal wetted materials that replace the necessity for diaphragm seals. Enclosure 3.
200P NEMA 4 & 13	Series Pressure Switch/Internal Adjustment. 200P (piston sensor) is for hydraulic system pressures up to 10,000 psig. Enclosure 3.
201P NEMA 4 & 13	Series Pressure Switch/External Adjustment. The 201P (piston sensor) is for hydraulic system pressures up to 10,000 psig.
225P NEMA 4 & 13	Series Pressure Switch/Tamper Proof. Incorporates a sealed piston sensor for high impulse hydraulic applications. Suited to weather proof application. Enclosure 3.
231P NEMA 4X & 13	Series Pressure Switch/Internal Adjustment. Compact, adjustable pressure switch for high pressure hydraulic process applications. Enclosure 3.
232P NEMA 4 & 13	Series Pressure Switch/Internal Adjustment. Compact adjustable switch for high pressure hydraulic process applications. Excellent set point stability and vibration resistance. Enclosure 3.