Is the LIT compatible with the Multitrode^® “probe”?

Yes. The LIT works on the same principle as the Multitrode^® controllers – it applies a low a.c. voltage to each of 10 contacts on the level device (FOGRod or “probe”) and looks for current flow to ground.

So if you have a Multitrode “probe” in a well in good condition and you need to replace a Multitrode controller the LIT can be installed. There are two important points to note:

a) the LIT is expecting to “see” a 60kOhm resistance between input 10 and FS (50kOhm to 70kOhm will be fine). You can buy a 60kOhm resistor from somewhere like Radio Shack for a few cents. Connect it between FOGRod input 10 and FS. (If you don’t, the LIT will measure level just fine, but you will have an alarm light on the LIT).

b) Multitrode controllers range from the simple MTR relay, the MTIC indicator controller, the MT2PC pump controller through to the MultiSmart pump controller. The LIT does not replace the control function, only the level measurement.

If you’re replacing the MTR or MTRA you’ll need to add latching relays to the LIT.

If you’re replacing the MT2PC, MT3PC or MultiSmart you will need to add latching relays and an alternator.