Level Switches & Transmitters
Level switches and level transmitters are essential instruments for monitoring and controlling liquid levels in tanks, reservoirs, and industrial process systems. These devices help ensure safe operation, protect equipment, and support efficient process control across a wide range of industries. RSP Supply offers a complete selection of level switches and transmitters designed for reliable performance in demanding environments.
Level switches provide point-level detection by sensing the presence or absence of liquid at a defined height. When a set level is reached, the switch sends an on/off signal to a control device such as a pump, alarm, or valve. This makes level switches ideal for applications like overflow prevention, dry-run protection, and high- or low-level alarms. Their simple signaling function supports dependable operation in both basic and safety-critical systems.
Level transmitters, by contrast, deliver continuous liquid level measurement over a defined range. These devices send an output signal, commonly 4–20 mA, that represents the exact level within a tank. Continuous measurement makes level transmitters well-suited for process control, wastewater treatment, and food and beverage applications, including those involving hazardous environments or challenging process fluids with varying density or viscosity. Constructed from durable materials such as stainless steel, brass, or aluminum, level switches and transmitters are designed for long-term reliability under harsh industrial conditions.
Level Switches
Capacitive Level Switches
Capacitive Level Tranmitters
Submersible Level Transmitters
Ultrasonic Level Transmitters
Pump Controllers
FAQs
Q: What is the difference between a level switch and a level transmitter?
A level switch provides point-level detection and sends an on/off signal when a specific level is reached. A level transmitter provides continuous measurement of the liquid level and sends an analog signal representing the level across a range.
Q: Where are level switches commonly used?
Level switches are commonly used for high- or low-level alarms, pump control, overflow protection, and dry-run prevention in tanks and reservoirs.
Q: What industries use level transmitters?
Level transmitters are widely used in process control, wastewater treatment, chemical processing, and food and beverage applications where continuous and accurate level measurement is required.
Q: What is the difference between a transmitter and a transducer?
A transmitter typically sends a current signal, such as 4–20 mA, while a transducer sends a voltage signal. Transmitters are preferred for longer signal distances due to better resistance to signal loss and interference.
Q: What materials are level switches and transmitters made from?
Level switches and transmitters are commonly made from stainless steel, brass, or aluminum to withstand corrosive liquids, high temperatures, and demanding industrial environments.
Why Buy Level Switches and Transmitters from RSP Supply
RSP Supply offers a wide range of level switches and transmitters designed for accurate liquid level monitoring in industrial applications. Our selection supports both point-level detection and continuous measurement, with durable construction and compatibility across many tank and process configurations. Customers rely on RSP Supply for dependable products, technical knowledge, and solutions that support safe and efficient liquid level control.