MOBILTEX SPI1-SDL Portable Current Interrupter

Powerful Interruption Controller For Use With Cathodic Protection Rectifiers


Based on years of experience and feedback from the pipeline industry, MOBILTEX designed the first CorTalk GPS interrupter in 2006. The SPI1 is a powerful interruption controller for use with cathodic protection rectifiers. Precise timing accuracy and repeatability is attained with GPS and microprocessor technology. A small physical size and wide operating temperature make these devices ideally suited for installation with/within field rectifiers.

Key Benefits

  • Internal 20 Channel GPS Receiver
  • Internal rechargeable battery provides up to 7
  • days of operation
  • LCD display for local voltage monitoring
  • Fast, simple device configuration, data retrieval and charging via USB
  • -22° to +158°F operating temperature range allows use in extreme environments




  • Detailed plain English menus provide easy and intuitive operation
  • Bright backlit alphanumeric display provides detailed presentation of all important parameters
  • Large dedicated function keys with audible annunciation facilitate accurate data entry
  • Color coded bright LED indicators focus the user's attention to important status conditions
  • A resolution of 1ms and maximum range of 60,000ms for OFF and Cycle Times provides the user with very fine timing selection
  • Excellent timing accuracy is attained with a 20 channel GPS receiver and a temperature compensated high stability crystal Interactive oscillator
  • Field programmable parameters allow device customization for use with a wide range of relays
  • Can immediately operate in manual mode or be programmed with up to 7 predefined schedules
  • Device configuration parameters and schedule are permanently stored in non-volatile memory with autoresume after a power disruption -30° to +70°C (-22° to +158°F) operating temperature range allows use in extreme environments
  • Internal AC line synchronization provides rectifier switching at zero primary current conditions
  • The front keypad and display are fully sealed and waterproof for maximum reliability
  • GPS satellite and internal diagnostic self test routines assure proper operation
  • Holds rectifier power on when not interrupting
  • Software can be field upgraded using RS-232
  • Can include or be upgraded to include a data logger
  • Low current solid state components provide maximum reliability
  • The portable SPI1 can drive up to 3 external relays for close proximity multi-rectifier interruption