MOBILTEX CorTalk uDL2 Micro Data Logger for CP Coupons

High Accuracy, Two-channel Data Logger AC & DC Current Measurements


Tiny, yet highly capable, the CorTalk uDL2 provides comprehensive data measurement and logging of coupon status in CP systems. The device provides reliable, accurate measurement of AC current density, coupon DC current, a range of potential measurements and more. The device’s rechargeable battery provides up to four months of service and up to 2,000,000 readings on a single charge.

Periodic field surveys of cathodic protection systems can’t identify frequent, short-term events that can seriously impact pipeline integrity. Mobiltex data loggers can! These pocket-sized, highly accurate devices are designed to be quickly installed inside rectifiers and test stations to measure and record critical performance parameters from the CP system.

The uDL2 offers a wide range of configurable settings that includes sample rate, current measurement ranges, time, geo-location and more. A tough enclosure, combined with durable components provides reliable operation in the harshest of operating conditions, while a long-lasting rechargeable battery ensures months of operation.

Key Benefits

  • Compact units fit inside most standard CP test stations
  • Internal rechargeable batteries provide 4-6 months of continuous operation
  • LCD display for local voltage monitoring
  • Fast, simple device configuration, data retrieval and charging via USB
  • Lightning and surge protection with broad operating temperature range (-4°F to +140°F)





  • Operation in -20 to +60°C (-4 to +140°F)
  • High measurement accuracy over -20 to +60°C (-4 to +140°F)
  • Can measure AC and DC simultaneously
  • Integral rechargeable battery provides over 4 months or 2,000,000 readings per charge
  • Water resistant (non-submersible) enclosure for harsh environments
  • Lightning and surge protected
  • Measures AC current density, coupon DC current, coupon DC potential, coupon AC voltage, instant-disconnect DC potential and depolarized coupon DC potential
  • Very small size 89mm x 40mm x 18mm (3.5" x 1.6" x 0.72") allows for use with most standard CP test stations
  • Water-resistant (non-submersible) enclosure for harsh environments
  • Wide operating temperature range -20°C to +60°C (-4°F to +140°F)
  • Integral rechargeable battery provides over 4 months or 2,000,000 readings per charge
  • 3½ digital wide-temperature LCD for local voltage monitoring
  • Automatically powers on when measurement cable is connected
  • Two bi-polar analog inputs connect to a coupon and reference cell
  • Coupon DC current measurement ranges ±60mA & ±300mA
  • Coupon AC current measurement rages 40mA & 200mA True RMS
  • Automatic shunt disconnect when overcurrent is detected
  • >20MOhms P/S input for for direct connection to a reference cell
  • Reference cell measurement ±22VDC & 15VAC True RMS
  • Can measure AC and DC simultaneously
  • DC measurements have >65dB of 50/60Hz AC rejection for stable and accurate readings
  • High measurement accuracy over -20°C to +60°C (-4°F to +140°F)
  • Lightning and surge protected
  • Configurable instant-disconnect measurement delay
  • Configurable coupon depolarization time
  • Can measure and log internal temperature
  • Non-volatile 2,000,000 measurement storage memory
  • All measurements are time and date stamped
  • User configurable sample rate from 1 per second to 1 per 12 hours
  • USB conenction to PC laptop for configuration, data uploading and battery charging
  • Easy device configuration and data uploading through a PC-based graphical user interface
  • PC chart graphical preview of logged data
  • Comma Separated Value (CSV) data file export