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Level sensors monitor the level of liquids, pellets, and powders in tanks and process systems. Sensors include contact, non-contact and submersible sensors, as well as float and paddle switches. Level controllers add the ability to control alarms, pumps, valves, and other industrial equipment.
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Level Sensors and Controllers
Category Selection
- Ultrasonic Level Sensors/Switches
- Radar Level Sensors
- Submersible Level Sensors
- Differential Pressure Transmitters
- Vibration Fork Level Switches
- Vibration Rod Level Switches
- Float Level Switches
- Rotating Paddle Level Switches
- Capacitance Level Switches
- Level Controllers
- Level Sensors & Controllers Accessories
Level, one of the most common process measurement in industry, is typically used to determine volume and track the amount of product available in a vessel or container. Level sensors can monitor the level of a variety of materials including liquids, pellets, powders, and more that are used in process systems. Integrated level controllers monitor inputs from level sensors and operate alarms, pumps, valves, and other industrial equipment when a corrective action is needed. A variety of level sensing technologies is available, including contact and non-contact methods.
For part listings and specifications, go to Shop Now
Ultrasonic Level Sensors/Switches
Ultrasonic level sensors emit a sound impulse and measure the echo's return time from the material's surface. Unaffected by environments with dirty, sticky, or scaling media, these sensors are available in contact and non-contact versions and for use in hazardous or high-condensation locations.
- Non-contact ultrasonic sensors are ideal for applications with dirty, sticky, and scaling liquids
- Reflective ultrasonic sensors deliver reliable level measurements in high-condensation environments
- Intrinsically safe contact switches reliably detect chemical, solvent, hydrocarbon, and petroleum-based liquid levels
Radar Level Sensors
Radar level sensors offer reliable level measurement with high accuracy, low maintenance, and no moving parts. These sensors utilize guided wave, pulsed, or frequency modulated continuous wave (FMCW) radar sensing technologies to provide versatile solutions for a wide range of industrial and commercial level measurement applications.
- Point (switch) and/or continuous level (analog output) measurement, depending on model
- High environmental protection ratings
Submersible Level Sensors
Submersible level sensors provide continuous liquid level measurement by sensing the hydrostatic pressure produced by the height of liquid above the sensor, providing a 4-20 mA output signal compatible with PLCs, panel meters, data loggers, and other electronic equipment.
- NSF certified models for drinking water applications
- Models with FM and UL hazardous location approvals for intrinsically safe applications
Differential Pressure Transmitters
Differential pressure level transmitters offer accurate low-differential pressure measurement of liquid level in pressurized or open tanks for many industrial applications. Models sense up to 400 inches of water column and are easily scaled to different pressure ranges and units of measure.
- Wet-wet design ideal for measurement of hydrostatic liquid level
- Bright backlit 6-digit LCD display
- Rugged NEMA 4X (IP65) aluminum die cast housing
Vibration Fork Level Switches
Vibration fork level switches use tuning fork technology to provide reliable liquid point level detection. They are ideal for monitoring, alarming, and control applications, even when conductivity, turbulence, air bubbles, foam, pressure, temperature, or viscosity changes may be a factor.
- Short or extended insertion lengths
- Standard or high process temperature ranges
Vibration Rod Level Switches
New!
Endress+Hauser Soliphant® FTM20 vibration rod point level switches operate at their resonant frequency to detect fine or coarse bulk solids when they cover the rod and dampen its vibration. These cost-effective sensors are insensitive to build-up and provide maintenance-free operation and easy setup with no calibration required.
Float Level Switches
Float level switches use magnets and reed switches to determine the level of liquid using the buoyancy of the float. Top-mount float level switches have a permanent magnet inside a hollow float and side-mount float switches have a magnet fixed to the pivot arm of a hollow float. As the liquid rises/falls, the distance between the magnet and the reed switch is varied causing the circuit to open or close. Float switches provide a low-cost solution for liquid-level monitoring applications and offer a variety of constructions compatible with many liquids, temperature ranges, and system pressures.
- Vertical and horizontal mounting styles
- A variety of process connections for easy installation
- Specialized switches for 55-gallon drums and HVAC condensate lines
Rotating Paddle Level Switches
Rotating paddle level switches provide point level measurement of solid materials using a motor-driven rotating paddle. The switches are actuated when the monitored material covers the blade, impeding its rotation. AC and DC powered versions are available, as well as hazardous location models.
- Available with a selection of shaft lengths, and a rope version that can be field shortened
- Models with Factory Mutual (FM) certification for Dust Ignition Proof, Class II, III, Division 1, Groups EFG applications
Capacitance Level Switches
Capacitance level switches are contact sensors that provide point-level detection of powders, fine-grained bulk solids, or water-based conductive liquids. Many models have hazardous location ratings or are FDA-compliant for food and beverage industry applications when installed with appropriate hygienic fittings.
- Solid state or relay outputs
- IO-Link capability on select models
Level Controllers
Level controllers provide fail-safe control of pumps or valves and are available with discrete I/O for alarms, pump and valve control, or with analog I/O for more accurate level monitoring and control.
- Switch-Pro™ series is available in three discrete sensor input configurations
- DataPoint™ series provides single tank level indication
- Conductive liquid level controllers detect and control levels of conductive liquids (tap water, seawater, sewage, chemical solutions, etc.).
Level Sensors & Controllers Accessories
Level sensor and controller accessories include a general-purpose digital indicator, free downloadable configuration software, and a USB adapter fob (for programmable level sensors), as well as probes, junction boxes, and other parts and fittings needed for installation and integration.
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