Moniteur selects the industry’s best mechanical switches to handle a wide variety of applications, meeting the tough demands of today’s process industries. A full range of mechanical snap-acting switches is available, as shown in the table below.
Mechanical SPDT and DPDT Switches
Mechanical Switch Selection
| Specifications – Mechanical Switches | ||||
|---|---|---|---|---|
| Switch Type | Switch Code | AC Rating | DC Rating | Form |
| SPDT (Cherry) | 1 | 15A – 250V | 2.5A – 24V | C |
| Gold Plated SPDT (Prism) | 3 | 1A – 120V | 1A – 24V | C |
| DPDT (ITW) | 4 | 10A – 250V | 7A – 24V | CC |
| SPDT (C&K) | C | 15A – 250V | 0.5A – 125VDC 0.25A – 250VDC | C |
Mechanical SPDT switches are the most common switch used due to their low cost and proven reliability for general purpose applications. In addition to transmitting valve position, the switch’s high amp rating can control a relay, or other plant devices such as pumps or motors.
Mechanical DPDT are used for simultaneous switching functions when two independent signals must operate in tandem. An example is when one switch sends a low level signal back to the control room, and a second functions controls a relay or another device.
Warning: Moniteur DOES NOT recommend that two SPDT switches be used in lieu of one DPDT for any application.
Gold plated Mechanical switches are used in low current, low voltage (primarily DC) applications. Gold plated switch contacts assure signal stability at extremely low current and voltages, and are often used as a low cost alternative in Intrinsically Safe systems