100 Series Pressure, Vacuum,

Differential Pressure and Temperature Switches



The 100 Series is a cost-effective pressure and temperature switch for process plants and OEM equipment. The rugged, one piece enclosure features a slanted cover for wiring accessibility.


A wide variety of microswitch and process-connection options make this versatile series ideal for applications requiring a rugged weather-proof mechanical switch.


Typical applications that utilize the 100 Series are heat tracing, freeze protection, processing equipment (pumps, compressors),  inputs for annunciator panels, and fire suppression systems.




Product Overview




Rugged, NEMA 4X, epoxy coated enclosure

SPDT or DPDT switch output

Easy access wiring

Single switch output

Internal reference scale and adjustable deadband available

Adjustable ranges: ◦30 "Hg Vac to 5000 psi

       • 1 bar Vac to 344 bar

       • 0.2 "wcd to 500 psid

       • 0,5 mbar d to 34,5 bar d

       • -180 to 650 ºF

       • -117 to 340ºC

Approvals: UL, CSA, CE, TUV


  UL listed and cUL certified.

  CE compliant to low voltage directive and pressure equipment directive.

  Optional ATEX or GOST intrinsic safety compliance

  Single switch (SPDT or DPDT) output

  Welded stainless steel diaphragm models

Ultra low pressure, “wc models

Optional sensor material for corrosive media

Polished stainless steel flushmount connection

Pump switch models with wide adjustable deadband





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


Ambient Temperature                    -40 to 160°F (-40 to 71°C); models 520-525, 540-548, 700-706, 15731-15736: 0 to

   Limits                                            160°F (-18 to 71°C); Set point typically shifts less than 1% of range for a 50°F (28°C)

                                                          ambient temperature change


Set point repeatability                 Temperature models: ± 1% of adjustable range

                                                          Pressure models 15623, 15731-15737, 171-174, 218, 270-376, 520-535, 540-543, 700-

                                                          706, 560-564: ± 1% of adjustable range; models 190-194, 183-189, 483-494, 544-548,

                                                          565-567, 610-680, 15884: ±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


Enclosure Classification              Enclosure type 4X


Switch Output                               One SPDT snap action switch; switch may be wired “normally open” or “normally closed”


Electrical Rating                           15A 125/250/480 VAC resistive except for H100-15623, 15731-15737, 15884, 20A

                                                          125/250/480 VAC resistive, B100-13546 and E100-13545, 22A/480 VAC. Electrical

                                                          switches have limited DC capabilities at 24-30 VDC, 2A resistive and 1A inductive. 125

                                                          VDC, 0.5A resistive, 0.03A inductive. Consult factory for additional information.


Weight                                            2-7 lbs; Varies with model


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


Pressure Connection                   Models 15623, 218, 270-376, 610-680, 701-706, 15731-15884: 1/4” NPT

                                                          (female); Models 171-194, 483-494, 520-535, 15737: 1/2” NPT (female); Models 540-

                                                          548: 1/8” NPT (female); Models 560-564: 2” Sanitary Fitting; Models 565-567: 1.5”

                                                          Sanitary Fitting (Sanitary fittings mate with Tri-Clamp® fitting systems)


Temperature Assembly                Bulb and capillary: 6 feet 304 stainless steel except for E100-13545, 10 feet 304

                                                          stainless steel Immersion stem: nickel-plated brass (standard) except for B100-13546

                                                          stainless steel;  optional 316L stainless steel


Fill                                                  Models 1BS/BC are solvent filled, models 2-8 non-toxic oil filled


Temperature Deadband                Type F typically 1% and type B, C, and E typically 2% of range under laboratory

                                                          conditions (70°F ambient circulating bath at rate of 1/2°F per minute change)


Heat Tracing or                             Thermostats designed specifically for heat tracing and freeze protection ambient sensing

   Freeze Protection                          applications are available with types B100 and E100


home / products / general purpose / 100 series

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