B/W Controls 1500-G-L1-S11 Liquid Level Control Relay

The B/W Controls 1500-G-L1-S11 is a robust induction relay designed for precise liquid level control in industrial applications. This module is part of the 1500 series, known for its reliability in monitoring and controlling liquid levels in tanks, boilers, and process vessels. It operates by sensing conductivity changes through electrodes, providing non-contact level detection that minimizes wear and maintenance. Key features include a compact design for easy integration, high sensitivity for accurate control, and compatibility with various liquids including water, chemicals, and sewage. Advantages over similar products include its durable construction, which withstands harsh environments, and its ability to handle multiple control functions like pump control, alarm activation, and valve operation. Benefits include reduced downtime due to reliable performance and straightforward installation. Drawbacks may include the need for periodic electrode cleaning in contaminated fluids and limited suitability for non-conductive liquids without modifications. Ideal for water treatment, food processing, and chemical industries, this relay enhances operational efficiency and safety. Based on attached images, the unit appears new in original packaging, with no visible wear, including mounting bracket and data sheet. Model decoding indicates 'G' for general purpose, 'L1' for low sensitivity, 'S11' for specific circuit configuration. Estimated market price for new units ranges from $150-$250 USD, based on comparable online listings from industrial surplus sites.