Master Catalog — Gems Sensors & Controls - I-7

From 2 to 6000 PSI (40 mbar to 400 bar),
GEMS Pressure Switches
Cover A Wide Range of Applications
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General, Vacuum, Specialty
Field-Adjustable or Factory Set Switches
High Proof Pressure
Rugged and Dependable

GEMS offers a choice of pressure switches, from compact cylindrical
models for OEM use, to larger, enclosed units for rugged process
applications. These switches are ideal for the filtering process of
coolants in the machine tool industry, use in transmissions of
off-highway vehicles and as redundant systems with existing monitors
such as transducers.

Unique Piston/Diaphragm Design
A piston/diaphragm design, incorporating the high proof pressure of
piston technology allows these switches to operate with the sensitivity
and accuracy of a diaphragm design. Repeatability ranges from 0.25
percent to 5 percent of the set point.

Many Materials To Choose From
Enclosures include aluminum, stainless steel, brass, reinforced plastic
and zinc-plated steel. Wetted parts include a diaphragm available in
Buna-n, Teflon® coated Kapton®, stainless steel, PTFE, EPDM or Viton®
and a pressure port available in stainless steel, brass or zinc-plated
steel.

PRESSURE SWITCHES

Pressure Switch Option Descriptions
G: 	Gold contacts are usually
required for low DC current
loads (<12 VDC @ 12 mA)
associated with TTL input
devices. They provide
decreased contact resistance,
which results in more reliable
switching especially in the
presence of an oxidizing
atmosphere.
OF: Wetted Materials are
ultrasonically cleaned to
remove oil and debris.
10A: 10A option is provided
by a microswitch rated 10
Amperes at 250 VAC. This
microswitch has a wide
movement differential, which
results in a larger deadband
than listed in the standard
catalog pages.

I-7

IP: Ingress Protection is
provided by either an epoxy
sealed cap (IP65) or silicon
wire seals (IP66). On some
models, this option is only
available with FS option.
RB: Rubber Boot is designed
to be cut out for the proper
wire or cable size by the
customer and sealed with
an appropriate sealant in the
field.
WF: Weatherpack female
termination consists
of the following Delphi
P/N's:(12045793 Conn " C "
Circuit), 12089188 Female
Pins and 12015323 Wire
Seals.

WM: Weatherpack male
termination consists of
the following Delphi P/N's:
12010973 Connector,
(12010717 Conn " C " Circuit),
12089040 Male Pins and
12015323 Wire Seals.
DE: Deutsch male termination
consists of the following
Deutsch P/N's: DT04-2P
Connector, (DTO4-3P " C "
Circuit) 1060-16-0122
Male Pins and W(2 or 3)P
Wedgelok.
FS: Gems will preset switches
to the indicated set point
within repeatability limits
listed on the specific product
catalog page.

Visit www.GemsSensors.com for most current information.

R: The restrictor option is
recommended for hydraulic
and pneumatic systems
that need a small reduction
in pressure pulsations to
increase pressure switch life.
It is a pressed in part that has
an orifice size of 0.045˝
(1.4 mm)
SR: The spiral restrictor option
heavily dampens pressure
pulsations in any hydraulic
system, which prevents false
signaling and premature
wear. It is not recommended
for pressure settings below
1500 psig (103 bar) because
it slows the response time
of the pressure switch
depending on fluid viscosity.

Pressure Switch Intro / p1of2 / 07-OCT-14
http://www.GemsSensors.com
Master Catalog — Gems Sensors & Controls

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