Introducing the CorTalk PI-1

Based on the award-winning concept that originated with Taku Engineering, MOBILTEX has enhanced the field-proven design of the CorTalk PI-1 Pocket Interrupter to deliver an even more robust, reliable and innovative solution for field Cathodic Protection interruption.

GPS-synchronized CP interrupters have historically been large, bulky devices with heavy external batteries that often required daily charging. Mobilizing to the field with enough interrupters for even small jobs with several galvanic CP systems could require hundreds of pounds of equipment. Often locations are extremely remote and may require plane or helicopter access, which combined with the required timing and equipment creates an expensive, logistical nightmare.

The MOBILTEX Pocket Interrupter One (PI-1) is a handheld, light weight two-channel GPS time synchronized cathodic protection (CP) current interrupter that makes these challenges a thing of the past. Capable of interrupting two CP current sources of up to 1 Amp and 20 Volts each, the PI-1 interruption channels provide standard On/Off cycles from 1-30 seconds and it includes a programmable external relay control. Plus there’s no computer or smart device required to setup so it’s simple to change interruption cycles on the fly.

The PI-1’s rugged, portable design makes it simple to transport enough interrupters for a large job in a single pack. The 15-day battery life allows multi-day jobs to be completed on a single charge and a half-hour charge will supply almost a full day of run time. And with a small solar panel (25 mA @ 6-20 Volts) the runtime is unlimited. Let the PI-1 evolution begin.

Powerful 72-channel uBlox 8 Series GPS ReceiverDelivers exceptional reception and accuracy even indoors or in locations with historically poor reception
2 channel interruption of any CP current source

Up to 1 Amp and 20 Volts each with independent timing parameters for each channel

Easily expandable for rectifier applications

Compatible with MOBILTEX Smart Relays [SRL1 & SRL2] to expand to 100 Amps and 100 Volts

Built to withstand the toughest conditions and most extreme environments

-40° to +60°C (-40° to +140°F) operating temperature range with full IP68 ingress rating allowing the device to be completely submerged in water and can withstand dust, dirt, and sand

Intuitively designed for the field

Graphic display with detailed simple-to-use menus allow for easy field operation with internal expansion connector for future peripherals

Engineered for maximum portability

Extremely lightweight and portable design fits in one hand and can be carried in your pocket

Long-life battery and smart field charging capabilities

AC/DC Multiport and Micro B USB rechargeable battery provides long runtimes of up to 15 days, a half hour charge will provide almost a full day of operation


Environmental + Physical
Operating Temperature-40° to +60° C (-40° to +140° F)
Storage Temperature-40° to +70° C (-40° to +158° F)
Ingress Protection RatingIP68 1 metre, 7 days
Physical size150 x 88 x 30 mm (5.9” x 3.5” x 1.2”)
Device weight300 grams (0.6 lb)
Interruption Output + GPS + Power
Relay drive [voltage/current]6 VDC / 12 VDC — 0.1 A / 0.3 A max
Relay contact close/open dwell5-150 ms
Relay typeSolid state or mechanical — NO or NC
GPS TimingGMT Time-Zone Offset +/- 12 hours — max drift +/- 36.7ms
Battery Life15 days, 12 hours / day
Charge Time8 hours maximum

Documents & software

MOBILTEX CorTalk PI-1Product BrochurePDF
MOBILTEX CorTalk PI-1 ManualPI-1 Manual v1.00PDF
Cathodic Protection Monitoring Pipeline scene graphic illustrated in an isometric view
Cathodic Protection Monitoring Pipeline scene graphic illustrated in an isometric view


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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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