Level Monitoring Relays
Level monitoring relays are used to monitor liquid levels, mixing ratios, and process conditions in tanks, reservoirs, and pumping systems. By detecting minimum and maximum levels, these relays help control pumps and valves to prevent tank overflow, dry running, or improper material ratios. Models with 1 or 2 changeover (C/O) contacts provide flexible control logic for a wide range of automation and safety applications.
RSP Supply carries level monitoring relays from trusted manufacturers such as Schneider Electric and Phoenix Contact. Schneider Electric Harmony Control Relays are designed to detect abnormal operating conditions related to liquid level, current, voltage, and other system parameters. Many models allow digital configuration using the Zelio NFC App, enabling precise adjustment of monitoring thresholds and time delays measured in milliseconds, seconds, or minutes. These relays are commonly used in applications including pumping systems, packaging equipment, lifts, textiles, and water treatment.
Phoenix Contact EMD monitoring relays provide reliable level detection with clear visual feedback through integrated LED indicators. These relays can signal faults via floating contacts or trigger system shutdowns to prevent equipment damage. Select models include startup and response delays to allow temporary deviations outside the monitoring range without nuisance tripping. With durable construction and clear status indication, these relays are well suited for industrial control panels and automated process systems.
FAQs
Q: What is a level monitoring relay used for?
Level monitoring relays are used to detect and control liquid levels in tanks or vessels. They help prevent overflow, dry running of pumps, and improper fill conditions by switching control circuits based on measured levels.
Q: What does 1 C/O or 2 C/O contacts mean?
C/O stands for changeover contact. A 1 C/O relay has one set of normally open and normally closed contacts, while a 2 C/O relay has two independent changeover contact sets for more complex control logic.
Q: Can level monitoring relays control pumps directly?
Level monitoring relays are typically used to control pump starters, contactors, or control circuits rather than switching high-current pump loads directly.
Q: Are time delays available on level monitoring relays?
Yes, many level monitoring relays include adjustable startup or response delays. These delays help prevent false trips caused by short-term level fluctuations.
Q: Can level monitoring relays send fault signals to a PLC or control system?
Yes, many relays provide floating or auxiliary contacts that can be used to signal alarms or status conditions to PLCs or other control systems.
Why Buy Level Monitoring Relays from RSP Supply
RSP Supply offers a comprehensive selection of level monitoring relays with 1 and 2 C/O contact configurations to support a wide range of industrial applications. Our product lineup includes proven solutions from leading manufacturers, designed for reliable level detection, clear status indication, and flexible control integration. Customers rely on RSP Supply for dependable components, technical expertise, and consistent support for industrial automation and control systems.