U.S. Ground
Parcel Shipments
See Shipping Policy

Level Switches & Transmitters

Level control and measurement in industrial processes is essential to optimize performance and avoid potential problems. Level measurement determines the position of a liquid relative to the top or bottom of a container. Levels that are too high can cause overflow, resulting in safety or environmental problems, while levels that are too low can cause damage to equipment. Fluid level control devices monitor, compare and regulate liquid levels within a process to a set value.

Mechanical float switches float on top of a liquid and move vertically as the level rises or falls. When the level is above or below a specific set point, the mechanical switch opens or closes, allowing an electrical current to pass through a connected device. The connected device can control valves to open or close, control pumps to let water in or out or trigger alarms to signal a problem.

Capacitive level transmitters are based on the principle of capacitance sensing. When the height of the measuring electrode changes by the liquid, the capacitance changes. Capacitance changes can result from the height of the liquid in a tank changing between the electrode and the tank wall.

Submersible level transmitters are submerged directly into the liquid to be measured and are positioned as close to the bottom as possible. The submersible pressure sensor measures the hydrostatic pressure, which correlates to the to the height of the liquid above. 

Ultrasonic level transmitters are designed to measure liquid level by emitting pulses of sound at the liquid surface and calculating the time it takes for the sound wave to bounce back to the sensor. The farther the sound travels, the lower the liquid level.

Pump controllers monitor and display present liquid levels and can be programmed to control one or more pumps to turn on or off, depending on preset liquid level values. 

Products

Products Per Page: Sort By:
$1016.60
Tek-Trol 4800C-50-42-25-P50 - The Tek-Sub 4800C Borehole Submersible Level Transmitter is only 19mm in diameter making it ideal for narrow conduit installations. The piezoresistive sensor is placed in a slim outer body that fits easily into boreholes, wells and slender pipes.  Rugged stainless steel body ensures that the transmitter serves seamlessly well, even in the most severe application conditions. The Tek-Sub 4800C also provides a diaphragm protection cap, customizable cable lengths and a vent tube for atmospheric pressure compensation. No maintenance, high accuracy, and long-term stability make it a perfect choice for narrow conduit applications.
$867.10
Tek-Trol 4800C-25-42-25-P34 - The Tek-Sub 4800C Borehole Submersible Level Transmitter is only 19mm in diameter making it ideal for narrow conduit installations. The piezoresistive sensor is placed in a slim outer body that fits easily into boreholes, wells and slender pipes.  Rugged stainless steel body ensures that the transmitter serves seamlessly well, even in the most severe application conditions. The Tek-Sub 4800C also provides a diaphragm protection cap, customizable cable lengths and a vent tube for atmospheric pressure compensation. No maintenance, high accuracy, and long-term stability make it a perfect choice for narrow conduit applications.
$986.70
Tek-Trol 4800A-TF-3-42-05-T7 - The Tek-Sub 4800A PTFE Submersible Level Transmitter has been designed for continuous submersion in aggressive fluids. This submersible device uses a rugged ceramic pressure sensor encased in PTFE housing that provides excellent corrosion resistance in most fluids. It facilitates simple installation, easy cleaning and years of trouble-free service with almost no maintenance. The device guarantees stability and reliability in harsh environments.The Tek-Sub 4800A operates on 12-36 VDC power. Available outputs are 4-20 mA, 0.5-4.5 VDC or RS-485.
$825.50
Tek-Trol 4800A-TF-2-42-05-T7 - The Tek-Sub 4800A PTFE Submersible Level Transmitter has been designed for continuous submersion in aggressive fluids. This submersible device uses a rugged ceramic pressure sensor encased in PTFE housing that provides excellent corrosion resistance in most fluids. It facilitates simple installation, easy cleaning and years of trouble-free service with almost no maintenance. The device guarantees stability and reliability in harsh environments.The Tek-Sub 4800A operates on 12-36 VDC power. Available outputs are 4-20 mA, 0.5-4.5 VDC or RS-485.
$825.50
Tek-Trol 4800A-TF-1-42-05-T7 - The Tek-Sub 4800A PTFE Submersible Level Transmitter has been designed for continuous submersion in aggressive fluids. This submersible device uses a rugged ceramic pressure sensor encased in PTFE housing that provides excellent corrosion resistance in most fluids. It facilitates simple installation, easy cleaning and years of trouble-free service with almost no maintenance. The device guarantees stability and reliability in harsh environments.The Tek-Sub 4800A operates on 12-36 VDC power. Available outputs are 4-20 mA, 0.5-4.5 VDC or RS-485.
$986.70
Tek-Trol 4800A-TF-1-42-05-T14 - The Tek-Sub 4800A PTFE Submersible Level Transmitter has been designed for continuous submersion in aggressive fluids. This submersible device uses a rugged ceramic pressure sensor encased in PTFE housing that provides excellent corrosion resistance in most fluids. It facilitates simple installation, easy cleaning and years of trouble-free service with almost no maintenance. The device guarantees stability and reliability in harsh environments.The Tek-Sub 4800A operates on 12-36 VDC power. Available outputs are 4-20 mA, 0.5-4.5 VDC or RS-485.
$986.70
Tek-Trol 4800A-T-3-42-05-T14 - The Tek-Sub 4800A PTFE Submersible Level Transmitter has been designed for continuous submersion in aggressive fluids. This submersible device uses a rugged ceramic pressure sensor encased in PTFE housing that provides excellent corrosion resistance in most fluids. It facilitates simple installation, easy cleaning and years of trouble-free service with almost no maintenance. The device guarantees stability and reliability in harsh environments.The Tek-Sub 4800A operates on 12-36 VDC power. Available outputs are 4-20 mA, 0.5-4.5 VDC or RS-485.
$702.00
Tek-Trol 4800A-T-2-42-05-T7 - The Tek-Sub 4800A PTFE Submersible Level Transmitter has been designed for continuous submersion in aggressive fluids. This submersible device uses a rugged ceramic pressure sensor encased in PTFE housing that provides excellent corrosion resistance in most fluids. It facilitates simple installation, easy cleaning and years of trouble-free service with almost no maintenance. The device guarantees stability and reliability in harsh environments.The Tek-Sub 4800A operates on 12-36 VDC power. Available outputs are 4-20 mA, 0.5-4.5 VDC or RS-485.
$986.70
Tek-Trol 4800A-T-2-42-05-T14 - The Tek-Sub 4800A PTFE Submersible Level Transmitter has been designed for continuous submersion in aggressive fluids. This submersible device uses a rugged ceramic pressure sensor encased in PTFE housing that provides excellent corrosion resistance in most fluids. It facilitates simple installation, easy cleaning and years of trouble-free service with almost no maintenance. The device guarantees stability and reliability in harsh environments.The Tek-Sub 4800A operates on 12-36 VDC power. Available outputs are 4-20 mA, 0.5-4.5 VDC or RS-485.
$702.00
Tek-Trol 4800A-T-1-42-05-T7 - The Tek-Sub 4800A PTFE Submersible Level Transmitter has been designed for continuous submersion in aggressive fluids. This submersible device uses a rugged ceramic pressure sensor encased in PTFE housing that provides excellent corrosion resistance in most fluids. It facilitates simple installation, easy cleaning and years of trouble-free service with almost no maintenance. The device guarantees stability and reliability in harsh environments.The Tek-Sub 4800A operates on 12-36 VDC power. Available outputs are 4-20 mA, 0.5-4.5 VDC or RS-485.
$1979.90
Tek-Trol 4300C-01-A-01-A-01-A-01 - Tek-Wave 4300C Free Space Radar Level Transmitter is a 26GHz high-frequency radar type level measuring instrument measuring up to 90 feet. This high-frequency radar transmitter is the best choice for measuring solids and low dielectric constant medium. Easy to install with a horn that fits in a 2” NPT. The antenna is furthered optimized as the new fast microprocessor can carry out signal analysis and processing at a higher rate. Therefore, Tek-Wave 4300C Free Space Radar Level Transmitter can be used for complex measurement conditions. The 4300C is not affected by foam, changes in water vapor, temperature or pressure. Its shorter wavelength provides good reflections on sloping surfaces. The small beam angle (18°) and the energy is concentrated, enhancing the echo ability and avoiding interference. Smaller measurement blind areas help to achieve good results for small tank measurement.
$1755.00
Tek-Trol 4300B-01-A-01-B-015-A-01-A - Tek-Wave 4300B Radar Level Transmitter, utilizing FMCW technology and Bluetooth connectivity for efficient level monitoring across various applications such as water treatment, storage tanks, and utility networks. With an impressive accuracy of ±2mm, a measuring range of 45ft, and a fast response time of <2S, it ensures precise and reliable measurements. The transmitter features Bluetooth commissioning, maintenance-free operation, and real-time self-monitoring, making it easy to install and operate in harsh environments. Its IP68 enclosure rating and CE approval further highlight its suitability for outdoor and challenging conditions.