Cathodic Protection Data Logger for CP Coupons with GPS Receiver

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 solve this challenge with pocket-sized, highly accurate devices that are designed to be quickly installed inside rectifiers and test stations to measure and record critical performance parameters from the Cathodic Protection system.

Each device 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.

Out of sight designCompact units fit inside most standard CP test stations
Maximum battery life Internal rechargeable batteries provide up to six months of continuous operation
Instantly view current dataLCD display for local measurement monitoring
GPS accuracyInternal GPS receiver provides an accurate time reference and site geo-location coordinates
Multiple memory optionsUp to 2,000,000 readings and a DC voltage waveform capture mode which samples at rate of 10 times per second
Easy to useFast, simple device configuration, data retrieval and charging via USB
Engineered to withstand the toughest conditionsLightning and surge protection, IP65 rated with broad operating temperature range ( -20°C to +60°C [ -4°F to +140°F ] )


Operating Temperature-20° to +60° C (-4° to +140° F)
Storage Temperature-40° to +70° C (-40° to +158° F)
Maximum Altitude5000 meters above sea level
Humidity0 to 100% RH non-condensing
Physical + Power
Weight75 grams (2.7 oz)
Size89mm x 40mm x 18mm (3.5” x 1.6” x 0.72”)
Power SourceRechargeable Internal Li-Ion (Not user replaceable)

Documents & software

MOBILTEX CorTalk uDL1 & uDL2Product Brochure ENGLISHPDF
MOBILTEX CorTalk uDL1 uDL2 ESProduct Brochure SPANISHPDF
MOBILTEX CorTalk uDL2 ManualCorTalk uDL1 Manual 1.07PDF
uDL1/2 Install Pack v1.0.0.20aConfiguration Application, Firmware and Drivers (uDL2 firmware v1.12)ZIP
uDL2 Config Apple iOS AppDownload from iTunesLink
uDL2 Config Android AppDownload from Play StoreLink
CorTalk Full Install Pack v1.0.0.25Download ZIP fileZIP
LTE Swap Apple iOS AppDownload from iTunesLink
LTE Swap Android AppDownload from Play StoreLink
CorView Apple iOS AppDownload from iTunesLink
CorView Android AppDownload from Play StoreLink

Frequently asked questions

Q: What is the uDL2 used for?

The uDL2 is a battery operated two channel data logger designed specifically for monitoring CP coupons. The uDL2 has an internal shunt enabling direct measurement of coupon AC and DC current. A reference cell input provides DC potential, AC voltage and Instant-disconnect DC potential measurements. The uDL2 can also be operated in dual potential mode for monitoring two structures to a common reference point.
The uDL2 can be configured to take measurements from every 1 second to 12 hours and can store up to 2,000,000 readings.

Q: What are the measurement ranges of the uDL2?

(Current-G1 model)(Current-G2/G3 model)
Single Range+/- 22VDC, 15V true RMS AC,
+/- 22VDC, 15V true RMS AC,
Low RangeN/A+/-7mADC, 5mA true RMS AC,
Medium Range+/-60mADC, 40mA true RMS AC,
+/-70mADC, 50mA true RMS AC,
High Range+/-300mADC, 200mA true RMS AC,
+/-300mADC, 200mA true RMS AC,

uDL2 measurement rangesuDL2-G2 measurement ranges

Q: Is the uDL2 auto-ranging for the coupon current measurements?

Unfortunately, no. The current range must be selected in the uDL2 Configuration Editor when configuring the uDL2.


Cathodic Protection Monitoring Pipeline scene graphic illustrated in an isometric view Cathodic Protection Monitoring Pipeline scene graphic illustrated in an isometric view


Call toll free: 1 844 689 3282 [NA]
1794 340515 [UK]

Our industry-leading Sales, Technical Support, and Service teams are ready to take you from product selection to initial set-up and continue to provide dedicated support throughout the product lifecycle.


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