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Temperature Gauge Ordering Information
Warning
All bimetal thermometers should be selected considering the media and the ambient operating conditions. Improper application can be detrimental to the thermometer, cause failure and possibly personal injury or property damage. Inaccuracies resulting from improper setting of the external adjustment by the user may cause personal injury or property damage. Consult ASME B40.3 for guidance in selection and use of bimetal thermometers.
Temperature ranges
Standard Fahrenheit and Celsius ranges have been established to encompass all normal temperature measurement requirements. A bimetal thermometer can be used at an operating temperature anywhere throughout its dial range. Provision should be made for extreme temperature conditions. No bimetal thermometer should be exposed continuously to process temperatures over 800°F (425°C). CasesThere are three case styles. The CI series has no adjustment but is hermetically sealed. The EI series has an external adjustment and is hermetically sealed. The EL series provides the same features as the EI plus the added benefit of liquid filling. The instruments are leak tested to ensure the integrity of the joints. DialsThe dials are based on computer-calculated temperature deflection data and have the Maxivision® format to minimize parallax error. Operating conditionsThe temperature of the case should be no more than 200°F (95°C); liquid filled 150°F (65°C). Temperatures beyond this value may cause discoloration of the dial or result in increased pressure inside the casing which could ultimately lead to the failure of the window. PointersThe pointers are balanced to close tolerances and the paint finishes are controlled to assure long-term stability under adverse ultraviolet conditions. CoilsThe bimetallic coils are carefully wound and inspected. Each is heat treated for optimum stability and overtemperature capability. WindowsThe standard windows are heavy-duty glass. Plastic and shatterproof glass are optional. ShaftsShafts are made of specially drawn stainless steel wire with a very smooth finish. ThermowellsThermowells must be used on any application where the stem of the bimetal thermometer may be exposed to pressure, corrosive fluids or high velocity. Additionally, the use of a thermowell permits instrument interchange or calibration check without disturbing or closing down the process. BearingsThe bearings are made of Teflon or other low friction material. |
