117 Series Hermetically Sealed Pressure Switches

Vacuum Switches, Differential Pressure Switches and Temperature Switches



Approved for Division 2, Zone 2 hazardous and corrosive atmospheres, and with optional Zone 0 intrinsic safety compliance,

the 117 Series can be used to measure vacuum, pressure, differential pressure, or temperature in a variety of applications.  The

rugged, one piece enclosure features a slanted cover for wiring accessibility to the enclosed terminal block that is wired to either

a SPDT or DPDT hermetically sealed microswitch. All welded, stainless steel pressure connections and sensors provide superior

corrosion resistance – NACE compliant – and fire-safe protection within the harshest environments.





Product Overview




The 117 Series is an ideal choice for the most demanding applications; typically steel and aluminum

mills, chemical and petrochemical plants, pulp and paper mills, wastewater treatment plants, midstream and downstream oil & gas, and pharmaceutical plants.

Compact design

Division 2, Enclosure Type 4X

SPDT or DPDT hermetic switch output

Terminal block wiring

Adjustable ranges:

       • Pressure & Vacuum: 30 "Hg Vac to 3500 psi

       • 1 bar Vac to 241 bar

       • Temperature: -120 to 650 ºF

       • -85 to 340ºC

       • Differential Pressure: 0.8” wed to 500 psid F

       • 2 mbar to 34.5 bar

  Approvals: UL, CSA, CENELEC, CE, NACE



Hermtically Sealed Div II Pressure Switch
Hermtically Sealed Pressure Switch

  Epoxy Coated Type 4X Enclosure and Stainless Steel Component Parts

  Hermetically Sealed Snap Switch, SPDT or DPDT Output

  Terminal Block Wiring

  Tamper-Resistant Set Point “Lock”

  Adjustable Ranges:


     30” Hg Vac to 3500 psi (-1 to 241,3 bar)

     "wc Ranges:

     300 “wc vacuum to 250 “wc pressure

     (-746, 7 to 622,3 mbar)

    Differential Pressure:

    0.8 “wcd to 500 psid (2,0 mbar to 34,5 bar)


    -120 to 640°F (-84.4 to 337.8°C)








Storage Temperature                 -65° to 160°F (-54 to 71°C)


Ambient Temperature                -40° to 160°F (-40° to 71°C); except models 520-525, 540-548, 700-706: 0 to 160°F

    Limits                                        (-18 to 71°C); set point typically shifts less than 1% of range for a 50°F (28°C) ambient

                                                       temperature change            


Set point                                     Temperature models: ± 1% of adjustable range Pressure models 171-174, 218,

     Repeatability                            358-376, 520-535, 540-543 and 700-706: ± 1% of adjustable range; models 183-194,

                                                       544-548, 483-494, 565-567: ± 1.5% of adjustable range Internal set point lock on all

                                                       pressure models


Shock                                          Set point repeats after 15 G, 10 millisecond duration


Vibration                                     Set point repeats after 2.5 G, 5-500 Hz


Enclosure                                   Die cast aluminum, epoxy powder coated, gasketed; captive cover screws; anodized

                                                       aluminum nameplate


Enclosure Classification          Enclosure Type 4X


Switch output                           One SPDT hermetically sealed snap action switch; switch may be wired “normally open”

                                                      or “normally closed”; DPDT (option 1190/1195)



Electrical rating                       11 A 125/250 VAC resistive; 5 A @ 28 VDC; 1 A @ 48 VDC; 1/2 A @ 125 VDC; switch

                                                      contacts gold flashed


Weight                                       1.5-6.5 lbs. Varies with model


Electrical  Connection             1/2” NPT (female); two 7/8” diameter knockouts


Pressure Connection              Models 218, 358-376, 700-706: 1/4” NPT (female); models 171-194, 483-494, 520-535:

                                                    1/2” NPT (female); models 565-567: 1.5” flush mount connection (mates with Tri-Clamp®

                                                     fitting systems), models 540-548: 1/8” NPT (female)


Temperature Assembly           Bulb and capillary: 6 feet; 304 stainless steel Immersion stem: nickel-plated brass

                                                    (standard); optional 316L stainless steel


Fill                                             Non-toxic oil filled


Temperature Deadband         Typically 4% of range under laboratory conditions (70°F ambient circulating bath at rate

                                                     of 1/2°F per minute change)


Reference Scale                       Pressure: “High-Low” reference scale Temperature: reference dial





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Tel:  (617) 926-1000

Fax: (617) 926-4354

Do you have a  customer service or technical question?  Please email us and we will get back to you.

180 Dexter Avenue, Watertown, MA  02472-4200