DR-2™ Dual Reference Cell
Zn and Ag / AgCl reference electrode for monitoring CP
The DR-2 uses both zinc and silver chloride reference electrodes for accuracy and longevity.
The DR-2 is a rugged, dual-element reference electrode designed for permanent subsea attachment to provide cathodic protection potentials. A standard DR-2 is designed to last 20 years. Both electrodes are housed in a machined Delrin body, giving the assembled DR-2 excellent impact resistance.
|Material:||Zinc (high purity 99.95%)|
|Weight:||12 lb. (5.45 kg)|
|Dimensions:||6" x 5" x 1.5" (15.2 cm x 12.7 cm x 3.8 cm)|
|Anti-passivation:||Embedded carbon steel rods|
|Accuracy:||+/- 0.02 volts|
SILVER CHLORIDE ELEMENT
|Material:||Sintered Ag/AgCl w silver wire core|
|Weight:||0.09 oz (2.5 gm)|
|Dimensions:||0.47" Dia. x 0.20" (1.2 cm Dia. x 0.5 cm)|
|Accuracy:||+/- 0.005 volts|
Key design points
Fewer inspections: Structures with permanent cathodic protection monitoring systems can be inspected subsea much less frequently, since interval surveys can be performed with a simple voltmeter.
Rugged design: The rugged design allows the DR-2 to be welded reliably to the structure and wired to the surface at minimal cost prior to deployment.
Conduits not needed: The double steel-wire armored cable can be free-routed on offshore structures with simple bands or cable clamps, saving the cost of conduit or duct systems.
High accuracy: The dual elements combine the high accuracy +/- 0.005 V of the silver / silver chloride electrode with the proven longevity of a zinc electrode.
No related download nodes