Thermal Level Switches

Thermal dispersion level switches reliably detect liquid or slurry levels using heat transfer, ideal for harsh, demanding process conditions.

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Kayden CLASSIC 810 Thermal Flow, Level & Interface Switch
Kayden Instruments
Kayden CLASSIC 810 Series Flow and Level Switch
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USB to RS-485 Convertor Cable
Kayden Instruments
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Kayden CLASSIC 812 Thermal Flow, Level & Interface Switch
Kayden Instruments
Kayden CLASSIC 812 Thermal Flow, Level & Interface Switch
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Mounting Baseplate for Kayden CLASSIC 800 Series Remote Electronics Enclosures
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Duct Flange, Flat
Kayden Instruments
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from $151.71 USD
Duct Flange, Rolled
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M10-1B00
Kayden Instruments
Kayden Blind Cover, CLASSIC Series
from $173.81 USD
Cable Assembly to Connect Sensor to Remote Electronics Mounting Plate, High-Temp
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Serial Communication Adaptor RS-232 to RS-485
Kayden Instruments
Serial Communication Adaptor RS-232 to RS-485
from $22.09 USD
Kayden Electronics & Probe Adapters
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Kayden Electronics & Probe Adapters
from $18.41 USD
Kayden CLASSIC 814 Thermal Flow, Level & Interface Switch
Kayden Instruments
Kayden Retractable Flow, Level & Interface Switch
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Spare Electronics Module for Kayden CLASSIC® 800 Series Switches
Kayden Instruments
KAYDEN CLASSIC 800 Series Thermal Switch/Transmitter Electronics Module
$898.50 USD
Kayden RCM Software Rev 7.2.0
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Kayden CLASSIC 816 Thermal Flow, Level & Interface Switch
Kayden Instruments
Kayden Retractable Flow, Level & Interface Switch
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A06 Explosion Proof Armoured Remote Electronics Cable Assembly, c/w T&B Star Teck Cable Fittings
Kayden Instruments
Kayden Flameproof Cable & Connector Assembly
from $215.05 USD
A05 General Purpose Remote Electronics Sensor Cable Assembly
Kayden Instruments
Kayden General Purpose Remote Cable
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USB Adaptor for use with Kayden SCA Adapter
Kayden Instruments
Kayden RS232/USB Adapter
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Kayden Local Enclosure Cover, CLASSIC Series
Kayden Instruments
Kayden Glass Lens Cover, CLASSIC Series
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M50-001G
Kayden Instruments
CLASSIC® Spare Glass Lens Cover, for CLASSIC® 800 Series Remote Electronics Enclosure, M50-001G
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A06 General Purpose Armoured Remote Electronics Cable Assembly, c/w T&B Star Teck Extreme Cable Fittings
Kayden Instruments
Kayden General Purpose Cable & Connector Assembly
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Thermal Level Switches

Thermal dispersion level switches are precision instruments designed to detect and monitor the presence or absence of liquids and slurries in industrial vessels, tanks, and pipelines. They function by measuring the heat transfer difference between a heated sensor and the surrounding media. When the level reaches the sensing element, a measurable temperature shift occurs, triggering a relay or electronic output. Thermal dispersion technology offers reliable, repeatable detection without moving parts, reducing maintenance requirements and enhancing operational safety.

The robustness and simplicity of thermal dispersion level switches make them exceptionally useful in challenging industrial environments. They operate reliably in a broad range of temperature and pressure conditions, tolerate harsh process media, and remain unaffected by changes in density, viscosity, or dielectric properties of fluids. This versatility makes them highly suitable for conditions where traditional mechanical switches or floats may fail due to fouling, turbulence, or vibration.

Typical applications span multiple industries, including oil and gas, petrochemical processing, wastewater management, power generation, and food and beverage production. In oil and gas sectors, these switches manage critical overflow and leak prevention functions. In chemical plants, they monitor aggressive substances, ensuring safety and process efficiency. Wastewater facilities employ them to prevent overflow, while in food production, they help maintain hygiene and product consistency.

Thermal dispersion level switches provide an essential control solution, combining ruggedness, accuracy, and ease of integration into automated control systems, significantly enhancing process reliability.