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Offshore Structure Protection >
Monitoring Equipment for
Cathodic Protection
Polatrak CP Gun™
Bathycorrometer Style Corrosion
Testing Probe for Divers
By Deepwater Corrosion
Services

The most user-friendly, diver-held cathodic
protection probe on the market.



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Product Overview
The Polatrak CP Gun outperforms all other
bathycorrometer type devices available in accuracy and convenience. Longer
battery life, interchangeable freshwater / seawater electrodes, and
ultra-bright LED displays (for limited visibility) make the CP Gun the most
user-friendly diver-held CP probe. The dual electrode elements and readouts
make it the most accurate, as the probe is self calibrating. Each probe kit
comes with a full complement of spare parts, and replacements are easily
available.
A single set of disposable alkaline batteries
provides up to 150 hours of continuous survey operation. A convenient on-off
switch allows display only when actually probing for even longer life. The
CP Gun is rated to depths of up to 300 m (~1000 ft). The CP Gun is designed
for situations where a few contact CP readings are required. The unit, like
all Polatrak probes, has twin elements and dual readouts. This provides an
unparalleled level of accuracy and redundancy.
The CP Gun kit comes complete with operating
and calibration instructions and a comprehensive supply of spare parts
Applications
- Ship hull surveys
- Platform surveys
- Dock and jetty surveys
Main
Benefits
- Guaranteed accuracy, common error
sources are eliminated with the twin element configuration
- Self-contained and self-calibrating. No
tie-ins to the dive umbilical are required.
- No battery chargers required, a full
season from standard alkaline batteries.
- All parts are replaceable.
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The CP Gun is ergonomically designed for divers,
with a pistol-grip and a convenient, thumb-operated switch (red). |
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The ultra-bright LED display
distinguishes
the CP Gun from other bathycorrometer-type probes.
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CP Gun Kit delivered in a
protective case. |

Key Design Points
- Guaranteed accuracy:
Many common sources
for error are eliminated with the twin element
configuration. The dual silver / silver chloride
(Ag/AgCl) electrodes provide internal redundancy and
on-line calibration, allowing the probe to be
reliably tested and readings verified in the field.
- Season long battery
life: The 2
standard 9V batteries, combined with the convenient
switch allows the probe to be used continuously for
the entire dive season, unlike most other corrosion
probes in it's class.
- Rugged construction:
The strong individual
elements of the CP Gun probe allows easy replacement
of worn or damaged parts without having to replace
the entire probe. Deepwater offers repair services,
or the probe can be rented and repaired by any of
the leading industry equipment rental houses.
- Ag/AgCl or Cu/CuSO4
Electrodes:
Interchangeable Cu/CuSO4 reference elements for the
CP Gun probe now allow diver or ROV surveys to be
performed in brackish or fresh water rivers and
lakes, where silver chloride electrodes are not
compatible.
- Ultra bright LED
readouts: The
CP Gun is the only diver held probe with bright,
back-lit LED readouts, allowing the diver to
interrogate the CP readings in conditions with low
visibility, such as river crossings and certain
brackish water areas.
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The zinc calibration
coupon is essential for calibrating the probe offshore,
and consequently, testing the reference electrodes. |
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The probe operates with
dual Ag / AgCl reference electrodes. The CP Gun Kit
comes with one (1) extra replacement. Additional
electrodes are available individually.
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The standard CP Gun kit
comes with all components and spare parts housed in a
custom-built, durable, water-tight offshore pelican
case, with an extendable handle and wheels.
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Lens removal requires a
new set of O-rings to be fitted to the grooves when
reassembling the CP Gun probe. The standard kit includes
several replacement O-rings. |
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Each standard CP Gun kit
comes with four (4) contact tips - one (1) mounted and
three (3) replacements. Additional replacement tips are
available individually. |
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The CP Gun's nose cone
assembly comprises the nose cone, a contact tip, and the
connector. Replacement tip(s) and cone(s) are available
separately. |
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The standard CP Gun Kit
also comes with four (4) replacement lens screws. These
are vital for re-attaching the lens to the main body of
the probe during maintenance. |
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The standard CP Gun Kit
also comes with two tubes of O-ring lube, for lens
reattachment during probe maintenance. Replacement tubes
are available individually. |
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