Derbyshire, Mack and Morgan, Inc.

Marsh Products

• External Reset Feature for Field Recalibration
• Hermetically Sealed Case Design
• 9 Dual Scale Ranges to 1000°F (525°C)
• Stem Lengths to 24"
• 1% Full Scale Accuracy
• 2", 3", and 5" Dials

Marsh Instruments Bimetal Thermometers combine the benefits of economy and reliability for local mounted temperature indication in the dual scale ranges from -50°F to 1000 (-40°C to 525°C). Additional advantages offered by the Series "L" Bimetal Thermometers include easy-to-read dual scale, fast speed of response, and accurate temperature indication. The hermetically sealed and ruggedly built case is resistant to shock, vibration, dust and moisture. Corrosion resistance to most chemicals is provided by the all welded type 304 stainless steel construction.
The extremely responsive bimetal sensing element provides an accuracy to within ±1% of scale. An external adjustment screw on the back of the 3" and 5" case provides convenient reset and field recalibration. Built-in over range protection is a standard feature.

• Back and Bottom Mounting Options
• Rotatable Red Set Pointer
• Rugged Construction
• Three-Color Dial
• Three Pressure Ranges
• 2.5" and 3.25" Dials

Marsh Instruments Tridicators (Boiler Gauges) are rdesigned and suitable for hot water heating systems. These instruments indicate pressure in psi and altitude in feet of H2O;
temperature in °F and °C. All models feature a rotating dial with a red arrow indicator for setting the desired pressure and altitude of the installation.

• Versatile Back/Bottom Connection
• 9 Case Designs
• 6 Ranges (to 350°F)

Marsh Instruments Vapor Actuated Thermometers bring economy and accuracy to remote measuring applications within the (-40° to 350°F) range.
Two basic styles allow either remote mounting of the temperature scale (as far as 75 feet from the sensing bulb) or direct mounting of the Thermometer for local temperature indication. Remote reading units offer, as standard, 6 feet of flexible capillary with double-braided copper armor for greater mechanical protection. Capillaries on center back models are reinforced with stainless steel coiled armor at the case. Bulbs are 3.5 inch standard with ½" NPT union connection.

• Fast Response
• High Accuracy
• Shock and Vibration Resistant

Marsh Instruments Liquid Actuated sensing system of the Model SCF features a spiral wound Bourdon tube that absorbs shock and vibration. Steady operation results, which
combines with the linear scale of the thermometer to allow accurate temperature readings.

• Temperature Indication Only or With Electrical Switches
• Excellent Vibration Resistance
• Direct Mount or Remote Case Mount Design

Designed for temperature measurement and/or control applications where vibration may be encountered. Available with up to three snap-action switches to activate alarms or control equipment. Choice of direct mount or remote mount case designs. Maximum temperature reached is indicated by a red marking pointer.

• Temperature Indication and Control
• Excellent Vibration Resistance
• Durable Weatherproof Case

Designed for application requiring both temperature indication and control (e.g., oil-cooled electrical transformers). Available with up to four micro switches to activate auxiliary electrical equipment or alarm devices. Switch points are easily adjusted without taking the unit out of service. Offers excellent resistance to vibration and features a weather-proof case.

• Excellent Vibration Resistance
• Fast Response
• High Accuracy
• Remote or Direct Mounting

The Model SJ Dial Thermometer withstands vibrating conditions to give accurate temperature indication. Its liquid-actuated temperature sensing system utilizes a spiral wound Bourdon tube that absorbs shock. Steady operation results, which combines with the 3½" dial size for ease of reading. The Model SJ is available in a variety of case styles and with a selection of temperature measurement ranges.

• Ideal for Outdoor Service
• Electric Contact Option
• Excellent Stability

Combination of weatherproof construction and phenolic case makes the T-2 and T-2E series thermometers ideal for outdoor service. These thermometers are also highly suited to installation where vibration typically causes stability problems. Each unit features a red marking pointer to indicate the highest temperature reached between readings.

©1999 Derbyshire, Mack and Morgan, Inc.