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Quick Selection Guide
Basic Series 101/121 differential pressure detectors with standard wetted parts are normally
suitable for air, oil, water and non-corrosive processes. Refer to the Quick Selection Guide section on page 4. Corrosive service and particular customer requirements may require optional
components. Refer to the How to Order section on this page or the dedicated page to locate
optional components, such as: housings, detecting elements, diaphragm systems, pressure ports and accessories. Each position in the model number, except Accessories, must have a designator.
Applications
The Series 101/121 differential pressure detectors in this catalog are suitable for a wide variety of process and fluid power applications. Specific application requirements can normally be met by
selecting optional components, such as, detecting elements and diaphragm systems. Certain applications may require customized specials. Consult local representative or the factory.
Weathertight, conventional explosion proof and hermetically sealed explosion proof models are presented in this catalog.
How to Order
Steps 1 through 5 are required; Step 6 is optional. Orders must have complete model numbers, i.e. each component must have a designator.
Order information must include:
a) Set Point (increasing or decreasing)
b) If decreasing Set Point, state from what greater Set Point is approached
c) Normal system (static) pressure
Step 1: Select Housing for type of service (pages 5 & 6).
Step 2: Select electrical Detecting Element for housing and electrical service (pages 6 & 7).
Step 3: Select Adjustable Range according to Set Point (page 8).
Step 4: Select Diaphragm and O-Ring for process compatibility and containment (page 9).
Step 5: Select Pressure Port for process connection (page 9).
Step 6: Select Accessories as required for service (page 10).
If Agency Listed, Certifed or Approved differential pressure detectors are required, see page 11 for components that must be specified.