Bringing Visibility
to Deep Sea Equipment
TopWorx™ Subsea Switches and Switchboxes
Proven automation solutions and local expertise to help you
overcome your toughest challenges.
Designed for constant submersion, TopWorx subsea products
offer reliable performance over their entire lifetime.
Bringing much-needed visibility
From wastewater plants to off-shore platforms,
to deep sea equipment
At several thousands of feet below sea level, reliable equipment performance is
critical. Not only are these systems and components hard to reach, but maintenance or
repairs could require highly skilled divers or other trained personnel. To avoid timeconsuming, costly downtime, you need to know what’s going on beneath the surface.
Emerson switches and switchboxes enable highly reliable direct-source feedback on
subsea equipment so you can be sure everything is working as it should. Designed to be
completely submerged in water, these devices can withstand corrosion and pressures
equal to that of 10,000 feet below sea level over their lifetime.
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deep sea applications involve demanding operating
conditions where downtime isn’t an option.
Engineers for submerged projects need reliable
sensor solutions that can reduce their maintenance
requirements on hard-to-reach equipment.
Existing switch solutions often can’t handle submerged
conditions on a regular basis and will eventually fail,
resulting in costly equipment damage.
Enjoy direct equipment feedback and valve
control—even in submerged areas
Emerson is a leading provider of deepwater project sensing and communication feedback solutions. With its sealed construction and
simple internal design, our proven TopWorx GO Switch combines the best aspects of mechanical lever-arm switches and proximity sensors
without the drawbacks. These units rely on proximity activation to activate dry contacts—gold ashed or palladium silver—and can reliably
withstand harsh subsea conditions, including corrosive saltwater. For reliable valve control, our K Series Switchboxes integrate solid, waterproof enclosures, durable materials and various switch options. Together, these subsea products succeed in bringing the most accurate
communications protocols to the world’s deepest submerged equipment.
Reliably receive direct-source feedback on critical subsea equipment
• Know the accurate, real-time status of rigs, valves, locks, dams and other equipment
• Avoid sensor failure with simple dry contact design—no calibration required
• Minimize component failure, reducing installation and maintenance costs
Minimize subsea equipment downtime deep below the surface
• Receive smart diagnostic information on hard-to-access equipment
• Reduce maintenance with rugged construction and sealed, single-part switch design
• Withstand corrosion and water ingress with specialty enclosure materials and coatings
Facilitate product installation with rugged, yet exible switch design
• Adapt GO Switch to any circuit or monitoring system without conversion devices
• Enable optional wireless capabilities without having to relay, divert or convert signals
• Simplify installation with custom mounting brackets
“At extreme depths, there’s no room
for error. I need reliable position
feedback on my equipment to avoid
lengthy repairs.”
– Projec t manager, off-shore platform
“ Proximity sensors and mechanical
switches are unnecessarily complex.
They fail too easily, especially when
submerged in saltwater.”
– Offshore project engineer
“ Deep sea equipment isn’t exactly easy
to access. I need to be able to receive
status updates in real time.”
– Systems engineer
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With Emerson, you can overcome your
subsea application’s toughest challenges.
Subsea Applications
• Deep-sea rigs
• Off-shore platforms
• Locks
• Dams
• Tanker loading and balancing
• Emergency shutdown valves
• Submerged saltwater applications
• Wastewater plants
• Hydroelectric and alternate deepwater energy
• Military (Navy)
• Autonomous underwater vehicles
• Diver operated underwater switches
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Endure the Deep Sea
Receive Real-Time Diagnostics and Data
TopWorx switches and switchboxes can withstand submersion pressures
equal to that of 10,000 feet below sea level, which is where many critical
equipment is located for deep sea operations.
Maintain Constant Submersion
Designed for submersion, TopWorx subsea products will perform as reliably
as TopWorx industrial and process products. Specialty enclosure materials
and coatings protect sensing and communication components from
corrosion, saltwater and wastewater.
Compatible with HART, Foundation Fieldbus and Probus, TopWorx products
bring the most accurate and dependable communications protocols to some
of the world’s deepest submerged equipment.
Improve Your Mean Time Between Failure
TopWorx subsea products provide reliable, direct-source feedback on critical
equipment so you can be condent your systems are working as they should.
This capability reduces the need for maintenance, which in many cases,
requires highly skilled divers.
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End sensi ng range can be extended
using external target magnets.
TopWorx GO Switches and Switchboxes
Until now, it has been difcult to bring reliable position sensing to
submerged equipment. In these environments, other sensors are prone
to fail, leading to unnecessary downtime and high maintenance costs.
TopWorx GO Switch eliminates these pain-points with an elegantly simple
design, offering a true maintenance-free sensor at extreme depths.
And for ON/OFF valve indication, our K-Series Switchboxes are a compact,
robust subsea solution that conforms to the latest European Directives.
Available in aluminum or 316 Stainless Steel, these durable units
successfully seal themselves from the environment, protecting the sensing
and communication components from water ingress and corrosion.
What’s your opportunity?
• Maintain component reliability at extreme pressures (equal to that of 10,000
feet below sea level)
• Receive real-time position feedback on subsea valves and equipment
• Reduce sensor maintenance, lowering your costs and downtime
• Adapt to various monitoring systems with exible wiring design
• Simplify switch installation with custom mounting brackets
• Avoid switch failure and calibration issues, thanks to magnetic activation
• Partner with a global supplier that offers local technical and sales support
Permanent magnets
English or metric
threads available.
Sealed contact chamber
prevent s moisture or du st
from reaching the contacts .
One-piece stainless steel
constr uction makes this a very
durabl e proximity s ensor.
Sensing face is stainless steel rather
than plas tic, preventi ng damage due to
incidental physic al contact.
Three magnets provide snap action
and soli d contact pressure, eliminating
‘contac t teasing’ and ‘contact chatter’
in high vibration applications.
Unique s awtooth cont acts are suitable
for high an d low electrical loads an d can
be wire d AC or DC, N/O or N/C.
Potti ng lls the entire switch cavity,
formin g a barrier against moisture.
Consumes no power to
operat e and has no current
leakage or voltage drop.
Multiple wiring options:
- Lead Wir es
- Subsea
- Cable
- Quick Disconnects
Model 73
Maintain condence under pressure.
With its TopWorx switches and switchboxes, Emerson enables the
more efcient, intelligent management and control of equipment
in off-shore, wastewater, hydroelectric and alternate deepwater
energy applications. A global leader in deepwater project sensing
solutions, our experts can help you avoid the pitfalls that come
with subsea equipment operation.
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Services offered...
• Global support with Emerson locations in
three countries
• Local suppor t with over 200 certied product
partners
• Ongoing technical and sales assistance
Featured Subsea Switchboxes
TopWorx™ K1P and K1S Switchboxes TopWorx™ KSS/KCS Switchbox
Part of our K-Series of switchboxes, these compact, reliable enclosures successfully withstand subsea
applications and meet the latest EU, NEC, IEC and CSA codes for electrical equipment.
• Aluminum (K1P) or stainless steel (K1S) enclosure
• Type 4X; IP 66/67/68 ratings
• IP68 up to 30 meters, optional 150 meters
• Conduit entries: two 1/2 NPT or M20
• Unique two-point cover reduces commissioning time
Available with two switches or a 4-20 mA analog or HART transmitter
Featured Subsea Sensors
TopWorx
Cylinder Position Sensors
™
Stroke-to-GO™
These cylinder proximity sensors provide
precise end-of-stroke position indication
on pneumatic and hydraulic cylinders and
include GO™ Switch Models 7C, 7D, 7E and 7F.
• Stainless steel housing
• SPST or SPDT contacts
• Operating pressure: 3,000 PSI (206 bars)
• Temperature range: -50° to +105°C
TopWorx™ GO™ Switch
70 Series
The 70 series includes all of our threaded
barrel style GO™ Switches, which are
designed to provide ultra-reliable precision
feedback in tough, subsea applications
• Sensing Distance up to 2.5mm (13mm with
target magnet)
• Sawtooth Palladium Silver SPDT/DPDT dry
contacts
• Hermetic Seal, Environmental Seal, Cable
Gland and Waterproof Connector Options
• Temperature ratings -65°C to 204°C
• 316L Stainless Steel Enclosure
• Global & Regional Hazardous Area
Approvals
• Pressure ratings up to 10,000 psi
The KSS Series can withstand depths of 2,500 meters and is ideal for rig positioning, subsea emergenc y
shutdown manifold valves and tanker loading or balancing applications.
• Ideal for subsea or submersible equipment
• Duplex or super duplex stainless steel
• Provides valve indication in seawater up to 2,500 m
• Available with various switches, including 4-20 mA analog or HART transmitters
Custom penetrations available to meet specied subsea connector or cable entry
TopWorx
™ GO™
Switch
10, 20 and 80 Series
An ideal replacement for traditional limit
switches, the 10, 20 and 80 Series GO™
Switches feature sealed contact s, no touch
sensing and snap action response.
• Sensing Distance up to 10 mm (96mm
with target magnet)
• Gold Plated Snap Action Contacts
• Environmental Seal, Cable Gland and
SubSea Connector Options
• Optional 316L Stainless Steel Enclosure
• Global & Regional Hazardous Area
Approvals
• Pressure ratings up to 10,000 psi
• Temperature ratings -50°C to 204°C
To learn more about our subsea products and expertise, visit Emerson.com/TopWorx
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Emerson delivers time-tested and innovative process automation, valve control and
proximity sensing solutions to subsea equipment. With TopWorx GO Switch and
Switchboxes, we can optimize your operation by improving sensor reliability and
equipment visibility in submerged saltwater and wastewater areas. Contact us today
for world-class technologies and services that can maximize your marine operation.
Visit us: Emerson.com/TopWorx
Your local contact: Emerson.com/contactus
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the prop erty of th eir respec tive owner s. © 2021 Emerson E lectric C o. All rights r eserved .
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