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Probes brochure

Operation manual

Polatrak CP Gun™
Bathycorrometer-style CP probe for divers

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

The CP Gun outperforms all other bathycorrometer type devices available on the market 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

Key design points

1. 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.

2. 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

3. 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.

4. 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.

5. 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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CP Gun Kit components

Zinc calibration coupon

zinc calibration coupon

The zinc calibration coupon is essential for calibrating the probe offshore, and consequently, testing the reference electrodes.

Ag/AgCl elements

Ag AgCl electrode element

The probe operates with dual Ag / AgCl reference electrodes. The CP Gun Kit comes with one (1) extra replacement. Additional electrodes are available individually.

Protective case

CP Gun custom protective case

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.

O-rings (for lens)

O-Rings for the CP Gun Probe

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.

Contact tips

replacement contact tips for the CP Gun probe

Each standard CP Gun kit comes with four (4) contact tips - one (1) mounted and three (3) replacements. Additional replacement tips are available individually.

Nose cone assembly

tank anodes

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.

Lens screws

replacement lens screws for the cp gun

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.

O-Ring Lube

replacement lens screws for the cp gun

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.