Marsh Gauges Marsh Bellofram Group of Companies


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Marsh Instruments Division of Marsh Bellofram

For more than 140 years, the Marsh Instruments division of the Marsh Bellofram Group of Companies has been synonymous with the design, manufacture and supply of the highest quality pressure gauges and thermometers, with a portfolio that has developed into the most comprehensive gauge lines in the world. Marsh Instruments pressure gauges are used in countless applications where accuracy, dependability and durability are essential. Whether a standard or a specially designed pressure gauge, Marsh Bellofram provides a highly rugged precision instrument, adaptable to wherever pressure or temperature measurements are required.


Literature:   Gauges


Marsh Gauges Include:

General Service
Severe Service
Precision Service
Process Gauges
Diaphragm Gauges
HVAC/R Gauges
Special Application Gauges

Marsh Gauges

Marsh gauges are designed to perform in rugged applications and harsh environmental conditions - especially where pulsation and vibration are a problem: Liquid Filled Gauges offer a significant cushioning and dampening effect, reducing pointer flutter and internal gauge damage; also lubricating the internals, and reducing corrosion.

Typical applications include refineries, chemical plants, offshore platforms, oil rigs, marine applications, general industrial application and OEM processes.

For more information on the various types of gauges available, and to make a quick selection for your needs, please refer to pages 1-4 of the Catalog, or call M&M Control Service at 800-876-0036.



Literature:   Marsh Thermometers

Bimetal ThermometersPocket ThermometerMarsh Industrial Thermometers

Marsh Instruments designs and manufactures a variety of high-reliability and cost-effective industrial-grade temperature instruments, including bi-metal, hot water, industrial, submarine, miniature (pocket) and digital thermometers and tridicators, designed to provide high-accuracy monitoring of temperature fluctuations in process control, offshore, power generation, oil and gas, chemical processing, medical equipment, HVAC and OEM applications.


Diaphragm Seals

Literature:   Marsh Diaphragm Seals

Marsh Diaphragm Seal 12000B8498 Gauge Protector with Rubber Diaphragm SealModel 14040 Welded Diaphragm Seal

Diaphragm seals are isolation devices, designed to separate pressure gauges and other instruments from the process media while allowing the instrument to accurately measure pressure. The use of diaphragm seals extends instrumentation service life and reduces downtime and maintenance costs, by protecting instrumentation from corrosion, clogging, freezing, or pulsation damage.


Filter, Regulator, Lubricator (FRLs)

Literature:   Marsh FRL's

Marsh FRLs

Filter regulators offer the same features as the pressure regulators with the addition of polycarbonate bowls, 5 or 50 micron filters, and manual, semi-automatic, or automatic drains. Lubricators feature polycarbonate bowls and field settable dials providing variable lubrication between 0 and 90 drips per minute. Units are available in 0-30, 0-60, and 0-120 psi output pressure ranges with a maximum supply pressure of 120 psi. FRLs are also offered with choice of 3/8, 1/2, 3/4, and 1 NPT pipe sizes. Their modular design facilitates easy maintenance and swap-out of the filter, regulator, or lubricator.


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