Siemens 7ML57251QE112BC0 Level Detection Switch

Siemens SITRANS LPS200 7ML57251QE112BC0 is a rotary paddle point level switch built for reliable level detection of bulk solids in challenging industrial environments. It supports compact, top- or side-mount installation with extension options up to 300 mm (11.81 in) and configurations that range from 100 mm to 10 m in sensing reach, enabling precise alarms for high- or low-level scenarios. The device belongs to the SITRANS LPS200 family and uses a rotating paddle to sense material presence; versions span from a basic aluminum design to high-temperature variants. Process temperature ratings vary by version: basic versions are rated up to 80 °C (176 °F), with options that reach up to 600 °C (1,112 °F) and different pressures up to 10 bar g. Power is supplied from 230 V AC at 1 rev/min in typical configurations. The LPS200 offers optional functional safety configurations (SIL 2) and fail-safe operation for critical processes, with shaft protection variants for aggressive solids. Applications include bulk solids such as cement clinker, flour, sawdust, carbon black, ash, and similar materials across industries like cement, power generation, mining, food processing, chemicals, and milling. The basic version uses an aluminum housing, and the product line supports a range of paddles and extensions to suit mounting orientation and material properties. The 7ML5725 family designation identifies the rotary paddle switch lineage, and 7ML57251QE112BC0 denotes a specific configuration within that family suited for level-detection tasks.