L.H. Marshall Company

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Columbus, OH

At L.H. Marshall Company, we pride ourselves on being a leading provider of high-quality thermocouples and exceptional service solutions. With decades of expertise and innovation in the field, we have established ourselves as a trusted partner for industries spanning from aerospace and automotive to energy and manufacturing.

Our team of dedicated engineers and professionals collaborates tirelessly to design, manufacture, and distribute a comprehensive range of thermocouple products tailored to meet the diverse needs of our valued clients. We offer an extensive selection of thermocouple types, configurations, and materials, ensuring that our customers have access to the perfect solutions for their unique applications.

From standard off-the-shelf thermocouples to custom-designed units, we possess the technical prowess and manufacturing capabilities to deliver products that are not only accurate and reliable but also optimized for efficiency and longevity. Our commitment to precision and performance drives us to employ the latest technological advancements and adhere to stringent quality control measures throughout every step of our production process.

At L.H. Marshall Company, we are more than a provider; we are a partner dedicated to empowering our clients with superior thermocouple solutions and comprehensive service offerings. Our unwavering commitment to quality, innovation, and customer satisfaction drives us to continuously elevate our products and services, enabling us to remain at the forefront of the thermocouple industry. Join us on a journey of precision and reliability - where your success is our ultimate goal.

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Thermocouples Power Pages

RTD Sensors

An RTD, resistance temperature detector, is a passive temperature sensing device that operates on the principle that the resistance of a metal changes as the temperature changes. The electrical current that passes through the element...

Temperature Sensors

Temperature sensors are devices that detect and measure coolness and hotness and convert it into an electrical signal. Temperature sensors are utilized in our daily lives, be it in the form of domestic water heaters...

Thermistors

A thermistor, a shortened version of the term thermal resistor, is a passive component whose resistance changes as the temperature in a system changes. Thus they serve as an inexpensive, accurate, and dynamic method for measuring temperature...

Thermocouples

A thermocouple is a transducer that converts thermal energy into electrical energy and is constructed by joining wires made from dissimilar metals to form a junction. Voltage is produced when the temperature at the junction changes...

Thermowells

A thermowell is a pressure-tight vessel that safeguards and increases the lifespan of temperature sensors in processing plants in cases where a measuring sensor is not otherwise mechanically or chemically useful in...

Cartridge Heater

A cartridge heater is a cylindrical tubular heating device that provides concise and precise heating for various forms of materials, machinery, and equipment. Unlike an immersion heater, a cartridge heater is inserted into a hole in the item to be heated to furnish internal radiant heat...

Heating Element

A heating element is a material or device that directly converts electrical energy into heat or thermal energy through a principle known as Joule heating. Joule heating is the phenomenon where a conductor generates...

Electric Heaters

Electric heating is produced by using a known resistance in an electric circuit. This placed resistance has very few free electrons in it so it does not conduct electric current easily through it. When there is resistance in...

Infrared Heating

Infrared heating is a heating method used to warm surrounding bodies by infrared radiation. Thermal energy is transferred directly to a body with a lower temperature through electromagnetic waves in the infrared region...

L.H. Marshall Company