Field Data Collection

MicroMax GPS300 Current Interrupter

Why Choose the GPS300

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The GPS300 is a rugged, NACE award-winning current interrupter featuring a built-in keypad and LCD display. Designed to fit inside most rectifier cabinets, it’s fully programmable and offers synchronized current interruption that’s designed specifically for cathodic protection surveys in a portable package.

GPS300 Specifications

Input Power

10 – 60 V DC or 8 – 42 V AC

GPS Synchronization


Interruption Cycle

Range: 0.1 – 999.9 s

Increments: 100 ms

Relay Drive Capacity</p?


Number of Programmable Schedules


Start Phase



Fully waterproof case with see-through cover.


LCD Display

Operating Temperature 

-30 °C to +70 °C (LCD visible from -20 °C to +60 °C)


1 lbs. 11 oz. (0.77 kg)

6.0” x 4.5” x 2.8”
Relay Options

Mercury Normally Closed (NC): 30 A, 60 A and 100 A
AC Solid State Normally Closed (NC): 80 A and 100 A
DC Solid State Normally Closed (NC): 100 A

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