Easily installed in a few critical areas, DR-2 CD can provide valuable data about CP and polarization. The DR-2 CD combines the standard DR-2 dual element reference electrode with a 1 sq. meter current-density monitor. The two types of instruments together allow engineers to monitor polarization of a structure. The instrument may be either hardwired to a surface location or read subsea with a SunStation readout. An Ag/AgCl reference electrode provides very accurate potential data for monitoring polarization of the structure. The heavy-duty zinc-electrode element provides a reliable, long-term data source alongside the more accurate, but less stable, silver chloride. D R - 2 C D ™ C P P O TE NTI A L M E A S U R E M E NT A ND C U R R E NT- D E NS I TY S E NS O R MENU INSTALLATION MONITOR CRITICAL AREAS DR-2 CD mounted at a critical point on the structure. Polatrak fixed monitoring components can be wired to the surface and monitored through a dedicated panel, or they can wire into the SCADA system. CURRENT DENSITY MONITOR The current-density sensor looks like a large metal fan with one sq. m of surface area. The readings from this extra monitor allow the operator to calculate data about the polarization of the structure. CABLE ROUTING DR-2 CD has an armored, 4 conductor cable wired to the surface for readouts or data transmission. KEY DESIGN POINTS MENU ATTACHMENT A rugged dual- element (Ag/AgCl sw / Zinc) reference electrode designed for weld-on, bolt-on or clamp-on attachment to an offshore structure. CURRENT DENSITY FIN SPECIFICATION REDUCE 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. EASY TO INSTALL The rugged design allows the DR-2 CD to be welded reliably to the structure and wired to the surface at minimal cost. RELIABLE CONDUCTOR CABLE 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. DUAL ELEMENT TYPES The dual elements combine the precise accuracy +/- 0.005 V of the silver / silver chloride electrode with proven longevity of the zinc electrode. MENU Material: ASTM A36 carbon steel 0.125" plate (3 mm) Finish: Sandblast Insulator: Delrin isolation plate and spacers Shunt: 1 mV = 10mA/sq. M CABLE 4 x #12 AWG PVC insulated, PU bedded, DGSWA, HMWPE. Sheathed (available upon request). ZINC ELEMENT SILVER CHLORIDE ELEMENT 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 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 MENU SPOTLIGHT OFFSHORE WIND FARM Project Case Study: ICCP anode sled to supplement failing anodes on 33 wind turbines Read more RELATED PRODUCTS & EXPERIENCE I-Rod Model Downloads Read more Anode Testing Corrosion Laboratory Services Read more Bracelet Anodes Sacrificial anode bracelets for pipelines Read more More products RELATED CONTENT MENU DOWNLOADS More downloads CONTACT (713) 983-7117 CONTACT US GLOBAL LOCATIONS HOUSTON +1 713 983 7117 LONDON +44 1483 600482 RIO DE JANEIRO + 55 21 99110 2154 MACAÉ +55 21 2252.2172 / 2252.9281 PERTH +61 8 6298 7396 WAY AHEAD IN CORROSION CONTROL Site design by Rubbaglove © 2020 Deepwater Corrosion Services Inc QUICK LINKS Products and Services Projects About Downloads News MENU