The DC II comes with up to 1,500 feet of cable, making it ideal for any topside cathodic-protection survey.
The Polatrak DC II is the first and only twin-element portable reference electrode of its kind. The twin elements provide on-board calibration, reducing the chances of topside survey inaccuracies.
The DC II is used to survey more offshore structures worldwide than any other portable drop-cell-style cathodic protection probe, and has been specified by a large number of operators as the only acceptable choice of equipment. The 15-year evolution of this instrument has been based on the belief that responsible asset management begins with accurate cathodic protection testing.
Accuracy and ease of use are of chief importance to offshore CP technicians; the DC II boasts guaranteed accuracy +/- 5 mV. Trips offshore are expensive, and faulty equipment should never be a reason for repeating a mobilization.
The rugged thermoplastic housing and tapered cone prevents snagging. The DC II is available with extra-long cable (up to 1,500 feet) and a high-capacity cable reel. The standard model shown with 250 feet (75 m) of cable.
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 have readings verified in the field.
The DC II has been used on more corrosion surveys for offshore structures than any other drop cell (dip cell).
The DC-II costs about the same as old-fashioned, single-element electrodes. Readings can be obtained with a simple DC voltmeter.
To order in the United States, please call Beverly Claflin at (713) 983-7117 ext 222. For international inquiries, please see our list of international locations and agents.
The DC II comes standard with a reel and 250 feet (75 m) of cable. Additional cable up to 1,000 feet is available with the extended cable reel shown at left.
The DC II requires a voltmeter to be read in the field. Voltmeters are not provided with the standard drop cell kit, but are available (with all cables included) for an additional fee.
To allow a technician to verify the drop cell's readings offshore, the DC II requires a zinc calibration coupon (which is not supplied). Coupons are available separately.