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About Marshall Instruments

MARSHALL INSTRUMENTS, INC. is a manufacturer of thermometers, pressure gauges and automotive performance gauges. Since 1952, our family-owned business has been dedicated to quality craftsmanship and exceptional service. With decades of experience, we proudly design and manufacture the majority of our products in-house, ensuring top-notch quality and keeping production right here in the USA. Our commitment to tradition, innovation, and customer satisfaction has made us a trusted name for generations. Thank you for supporting American-made products and a family legacy built on excellence.


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