Salinity Probe Replacement Guide

See below for a reference table regarding which probe to use in the event yours needs to be replaced.

The two most common probes used are:

• EL-MPC-SP (commonly called 'SP1') -
  • As of 7/2023, - Obsolete, No longer available for purchase through factory, may still be stock via dealer network
• EL-MPC-SP4
  • Current part, readily available for purchase.

See bottom of page for photos of each probe.

MPC 3000 systems must be upgraded to MPC 5000 to function with SP4 probe if SP probe cannot be sourced.

SP2 & SP3 probes are discontinued, obsolete, and have not been available for purchase for several years.

All Spectra Connect systems use the SP4 Probe.

The easiest way to determine your MPC board's chip number is seen right on the display panel. It will say 'Spectra Watermakers A ## or B ##'

You can also look at the circuit board itself, the chip is the large white square towards the center of the board (see image below of MPC board & chip location).

MPC Board Example with chip location:

Daughter board (EL-MPC-SPCBA) example:

Note: A36 is compatible both with & without the daughter board

"SP1" Probe:

"SP4" Probe: