Condition Sensing Switches and Controls

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Temperature, Mechanical

Introduction Standards Compliance and Certifications Introduction Technical Data Ordering Information Catalog Number Explanation
Product Selection Modifications Accessories Renewal Parts Factory Options Approximate Dimensions
Factory Options

Factory-Set Temperature Controls

Ordering factory-set temperature controls

  • When a specific factory setting is requested, the specific terminal connections must be specified — e.g., N.O. or N.C. It must also be specified whether the contact operation is occurring on either increasing or decreasing pressure. For example:


    • Normally Closed (N.C.) contacts to open at¬  °F increasing temperature and close at¬  °F decreasing temperature.

    —OR—

    Normally Open (N.O.) contacts to close at¬  °F increasing temperature and open at¬  °F decreasing temperature.

  • If minimum differential is not critical and the inherent minimum differential satisfies the application, specify the factory setting as follows:


    • Normally Closed (N.C.) contacts to open at¬  °F increasing temperature. Minimum differential.

    —OR—

    Normally Open (N.O.) contacts to close at¬  °F increasing temperature. Minimum differential.

    Note:Typical setting tolerance is ± 1 °F.

    Two Controls in One Enclosure

    Bulletin 837 Style A Bulb and Capillary Type temperature controls that function independently may be mounted side by side in a single Type 1 enclosure. This design is ideal for installations where two controls would ordinarily be mounted. Each dual unit can be a combination of a bulb and capillary type temperature control and a Bulletin 836 Style A pressure control. See respective product tables.
    To order this arrangement, specify the two desired catalog numbers in their mounted position within the dual enclosure to form a single catalog number.

    Type 4X Enclosures

    Bulb and capillary controls can be furnished in Type 4X ROSITE polyester enclosures. Because of the intended protection by specifying Rosite, temperature controls will be supplied only with stainless steel bulb and capillaries or stainless steel bulb, capillary, and armor.

    Special Length Capillary and Material

    A price addition, varying with the specific requirements, will be added to each control when requesting non-standard length or material for capillary, bulb, or armor. The non-standard devices are those that are not listed in tables Style A — Remote Bulb and Capillary¬ T  and Style H — Direct Horizontal Immersion¬ T . Consult your local Rockwell Automation sales office or Allen-Bradley distributor for pricing.

    During the manufacturing process, the bellows assembly is cured in an oven at the maximum range temperature of the control to ensure long control life.

    ¬ Specify °F (Fahrenheit) unless otherwise noted.