Delta-Mobrey Top Mount Liquid Level Switch, Aluminium Bronze, Zone 1 ATEX, S01DB/F21/1

The Delta-Mobrey S01DB/F21/1 is a premium top mount liquid level switch engineered to deliver dependable and safe liquid level monitoring in a wide range of industrial environments. Equipped with a robust aluminium bronze enclosure and a non-asbestos sheet gasket, the level switch is optimized for demanding operating conditions where durability and chemical resistance are essential. This model is particularly suitable for hazardous applications, featuring Zone 1 ATEX certification, and an IP66-rated enclosure to ensure high performance in explosive atmospheres and harsh environments.

Designed for versatility, the S01DB/F21/1 can operate at temperatures up to 210°C and at system pressures as high as 18 bar, allowing its use in storage tanks, process vessels, and other applications requiring reliable control or alarm at fixed liquid levels. The device utilizes a magnetically activated float mechanism, and is equipped with two independent single pole single throw (SPST) snap-action contact sets, minimizing contact bounce and providing alternative make and break circuits for direct control or alarm signaling. With a maximum switching current of 5A AC, it is suitable for direct interface with industrial relays, alarms, or pump control systems.

This liquid level switch offers a variable differential, enabling users to adjust the switching point to suit the installation requirements. The use of a vertical stainless steel float on a long straight rod enhances sensitivity and longevity, particularly in aggressive or contaminated liquids. The enclosure is secured with a non-asbestos sheet gasket and is supplied with a 1.52 metre cable and M20 conduit entry, enabling easy installation and sealing in demanding process environments.

The Delta-Mobrey S01DB/F21/1 is compliant with key marine and industrial certifications including RMRS, RINA, DNV, CSA, and ABS, supporting its use in shipbuilding, chemical processing, water treatment, oil and gas, and other safety-critical fields. Its top mount design provides straightforward integration on tanks, sumps, and vessels for both high and low level detection.

This switch is widely applied for automatic pump control, protection systems, overflow alarms, or critical process safety loops. The high temperature and pressure ratings, together with ATEX certification, ensure that it meets the rigorous demands expected in hazardous or industrial plants. Its rugged construction and reliable magnetically coupled operation minimize maintenance downtime.

Explore the Delta-Mobrey range for additional industrial Level Switches and control solutions designed for safety, reliability, and process efficiency in industrial, marine, chemical, and oil and gas applications.