91MCE3-S1 Datasheet/PDFThe 91MCE3-S1 is a pneumatic snap-action limit switch manufactured by STI. This particular switch is suitable for applications involving sensing of pressure, temperature and displacement. It is UL listed and CSA certified.
The 91MCE3-S1 works by monitoring the differences in air pressure associated with the desired application. It is a direct acting switch and requires no air or electric supplies of its own. When the threshold value is exceeded, the switch will trigger and the output signal will be indicated.
The 91MCE3-S1 is designed to be used for pressure-sensitive industrial processes, such as the control of high-pressure air valves and pressure release systems. It is also suitable for sensing temperature changes in areas with potential for hazardous atmospheres. The switch can be used to sense displacement, such as the position of frictional materials on a conveyor belt.
The 91MCE3-S1 has a variety of features to make it an easy to use and reliable limit switch. The switch body has a damping chamber, which prevents bouncing action of the diaphragm. Additionally, it has built-in locking devices and a surface mountable actuator. The operator can also choose from five plunger styles: diaphragm, extended diaphragm, piston, shut-off valve and sliding plunger.
The 91MCE3-S1 is suitable for applications involving hazardous area and wet areas, as well as in pressurized machinery. It is also well suited for applications where the switch must be mounted in a concealed location. It incorporates contact together with durable PTFE insulation for contactor wear protection. The switch also comes with optional accessories, such as terminal blocks, surge protection and auxiliary external contact.
The 91MCE3-S1 has several important safety features. The diaphragm and actuator are designed to prevent accidental contact with live contacts. Additionally, the switch is designed with a high degree of insulation and a dielectric strength of 1000 volts.