ABB's LS Series Mechanical Level Switches are magnetically coupled, float- or displacer-operated point-level devices for detecting liquid levels in industrial applications. They feature hermetically sealed switching mechanisms with NEMA 4X housings, available in reed, cam-action, or pneumatic types with SPDT or DPDT outputs. The switches operate across temperatures from -320°F to 1000°F (-190°C to 538°C) and handle pressures up to 4500 psi (310 bar) and fluids with specific gravities as low as 0.25. Chambers are constructed from materials including carbon steel, 316 stainless steel, Hastelloy, and P11/P91 steel, certified to ASME U, UM, S, B31.1, B31.3, and PED standards. Process connections include flanged, socket weld, and NPT types with ASME, DIN, and HG ratings. The design eliminates diaphragms and seals, enabling maintenance-free operation and easy field adjustment without cover removal. The switches carry FM, CSA, and ATEX agency listings and include a five-year manufacturer warranty.
ABB's LS Series Mechanical Level Switches are the most rugged and durable liquid point-level detection products in the industrial marketplace today. ABB innovations such as the one-step switch point adjust and the hermetically sealed/dual compartment switching mechanism have eliminated the need for bulky housing covers that are associated with cracking, moisture ingress, high temperature fatigue, and ultimately switch failure. This configuration guide contains general guidelines and ordering data that will assist you in selecting the best float or displacer operated switch for your specific fluid level application. These switches are available in flanged or sealed chambers or as insertion models. ABB has over 100 configurations available.
| ABB Measurement & Analytics | |
|---|---|
| Product Category | Level Sensors |
| Product Number | LS Series |
| Product Name | Mechanical Level Switch |
| Device Classification | Sensor Only |
| Number of Switch Points Range | 1 (#) |
| Media Type | Liquid |
| Level Measurement Type | Single Point or Multi-Point Level |
| Maximum Operating Pressure | 4500 psi (3167 m H2O) |
