The 120 Series is an explosion-proof electromechanical switch for pressure, vacuum, differential pressure, and temperature applications in hazardous locations. It features a die-cast aluminum, epoxy powder-coated enclosure certified to NEMA 4X, Class I Division 1 (Type 7), and Class II Division 1 (Type 9), with IP66 rating. The switch offers SPDT, DPDT, or dual SPDT outputs with electrical ratings up to 22A at 480 VAC resistive, and includes internal or external adjustment with tamper-resistant covers. It supports multiple process connections, including 1/4" and 1/2" NPT, and optional wetted materials such as Hastelloy® and Monel®. Certified to cULus, ATEX, and IECEx standards, with optional approvals for additional regions.
Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions. As an electromechanical switch, it can safely operate independently of the control system and switch reliably when needed, free from potential communication errors or cyber concerns. Typical applications that utilize the 120 Series include rotating equipment such as pumps, turbines, and compressors, heat tracing, combustion systems, and oil, gas and chemical processing.
| United Electric Controls Company | |
|---|---|
| Product Category | Thermal Switches and Thermal Protectors |
| Product Number | 120 Series |
| Product Name | Explosion-Proof Pressure Switch |
| Switch Type | Gas-Actuated / Vapor-Tension (Bulb & Capillary) |
| Features | Direct Immersion; Explosion Proof |
| Poles | Single Pole, SP (optional feature); Double Pole, DP (optional feature) |
| Throws | Double Throw, DT |
