NUCLEAR QUALIFIED POSITION INDICATION SWITCHESEngineered withtechnology

The SNAP-LOCK® mechanism is what makes our positionindication switches so unique. Utilizing this technology inour design enables us to produce a robust, highly reliable
and trusted product for the nuclear industry.

Cam Type

Rocker TypeSNAP:
Our solutions have a “snap” action which enables a quick
action from one position to another, effectively eliminating
deadband. The contacts are forced to be in one position or
the other and cannot dwell in-between open or closed.
LOCK:
Instead of relying on spring or magnetic force, eachswitch has a locking mechanism that mechanically forces
the contacts to stay closed until released by the trip
lever. This eliminates any possible contact chatter due tovibration or seismic events.

Magnetic Prox Type

NAMCO utilizes three different SNAP-LOCK® mechanisms
detailed in the drawings on the right. The type ofmechanism selected is based on your application.

Applications

Balance of Plant
Commercial/Industrial
Test Conditions
Model

NEMA 1, 4, 13
EA170

EA700

EA080

NAMCO Limit Switches and Prox Switches withSNAP-LOCK® technology are used throughout thepower generation industry for a variety of criticalapplications.
• Valve Position• Overhead Cranes
Indication: From the• Mobile Equipment
MSIV to Balance of• HVAC Dampers
Plant• Presence• Actuator Position
Detection• Conveying• Door Closure• Over Travel• Level Detection
Protection

Qualifications
Contacts

DPDT

SPDT or DPDTSPDTConnection

NPT Conduit
Opening

NPT Conduit
Opening

NPT Conduit
Opening

SNAP-LOCK®

Rocker TypeCam Type

Rocker Typewww.namcocontrols.com

••
•••
•

IEEE 323-1974, 1983 & 2003
IEEE 344-1975, 1987 & 2004
IEEE 382-1972, 1980, 1996 & 2006
IEEE 383-1972, 1974 & 2003
IEEE 572-1985 & 2004
Special qualifications for Westinghouse
AP1000, GE, AECL, B & W and KOPEC design
specifications

Nuclear Qualified
Magnetic Proximity Switches

Test Conditions

Harsh Environment
With Accident Conditions

Harsh Environment
Without Accident Conditions

Mild Environment

LOCA, HELB, Radiation,
Seismic ResistantRadiation & Seismic Resistant

Low Dose Radiation &Seismic Resilience

Model

EA120 - SP

EA120 - DP

EA120 - SP

EA120 - DP

EA120 - SP

EA120 - DP

Contacts

SPDTDPDT

SPDT

DPDT

SPDT

SPDT

Connection
Options

Flying Leads

Flying Leads

Flying Leads

Flying Leads

Flying Leads

Flying Leads

QDC

QDC

QDC

QDC

QDC

QDC

Mechanical Limit Switches

Test Conditions
Model

Harsh Environment
With Accident Conditions

Harsh Environment
Without Accident Conditions

LOCA, HELB, Radiation & Seismic ResistantRadiation & Seismic Resistant

EA740

EA095

SPDT

DPDT

DPDT

SPDT

DPDT

NPT Conduit
Opening

NPT Conduit
Opening

NPT Conduit
Opening

NPT Conduit
Opening

NPT Conduit
Opening

QDC

QDC

QDC

QDC

QDC

Cam Type

Rocker TypeCam Type

Cam Type

Rocker Type

Soonging

min

Com
Co
Contacts
Connection
OptionsSNAP-LOCK®

EA170!

EA180

Soon!

EA090

1-800-390-6405 or 1-910-862-2511

What YOU Need – When YOU
Need It

Reliable and Responsive

Our team of engineers and sales representatives
will assist you every step of the way to be sure
you get what you need. Whether it is a pricing
quote, expedited delivery, technical support orapplication assistance, we are here to serve YOU!

Innovative
In 1972, NAMCO developed the world’s firstswitch qualified for safety applications in nuclear
power plants. With over 100,000 nuclear qualified
safety switches installed around the globe, noother manufacturer has more experience in oneof the world’s most critical applications.
Today, NAMCO continues to strive for innovation.
To ensure nuclear plants are less vulnerable in
the wake of natural disasters, our non-contact
position indication solution addresses the mostdemanding and evolving requirements in harshapplications. The NAMCO EA120 Series Magnetic
Proximity Switch utilizes our proprietory SNAPLOCK® technology, which enables us to exceed
seismic performance requirements in the smallest
footprint.

With over 75 years of experience, NAMCO leads
the industry by providing SNAP-LOCK® switches
in the most demanding applications such as steel
mills, auto plants, foundries and power plants.
SNAP-LOCK® technology provides unparalleledreliability in the toughest environments and inheavy-duty applications. NAMCO switches havethe ruggedness to operate under the most severe
conditions and have the durability needed for along, trouble-free operation.

Highest Quality Manufacturing
NAMCO products are manufactured and tested tothe highest quality standards, making them themost reliable on the market. Our commitment toour Quality Program means you, our customer,
get world-class products and top-notch customer
service.
•Manufactured to a QA Program designed
to meet 10CFR50 Appendix B and ANSI
N45.2, as applicable•

ISO 9001-2008 Certified

Contact Us

Not sure what you need? Our experienced
engineers and application specialists will help you
support any of your application needs – whether
nuclear qualified or balance of plant. Contact us
at info@dancon.com or call 800-390-6405 or
910-862-2511.

2100 West Broad Street • Elizabethtown, NC 28337 • www.namcocontrols.com | 800-390-6405
Copyright Danaher Specialty Products © 2015. All Rights Reserved Legal Entity: Dynapar Corporation
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