The Model 201-100-SLD
is an 8-pin plug-in style seal-leak detector to  sense seal failures on submersible pumps. A microcontroller-based relay that monitors the shaft
seal of a submersible pump motor. A resistive probe is installed in the seal cavity. If water leaks into the pump, the resistance measured by the probe decreases. When the resistance drops below the sensitivity setpoint, the unit will trip and the relay contacts will change state. The unit will
automatically reset when a fault is cleared.

The Model ALT-X
has an internal cross-connected relay and is used in dual high-level float applications. These floats are commonly referred to as lead and lag floats.
The pumps alternate as in the ALT-S version but the cross-connected relay configuration allows both pumps to run simultaneously when both the lead and lag floats are closed.  These relays are also available with a built-in switch (SW option) that is used to manually force one of the pumps to run every time the float switch is closed. This is helpful when a pump has been removed for repair or for test purposes.  In the case of the Model ALT-X-SW, the switch essentially forces one pump to be the lead pump, while still allowing the second to run when both floats are closed.  All Model ALT relays have a built-in debounce feature that prevents the relay from  changing state if the switch or float contact bounces momentarily.

The Model 460-15-100-LLS
is a liquid level sensor to detect the presence of conductive liquids. A probe is mounted at the desired tank level and connected to the
PumpSaver®. When the probe is submersed, the PumpSaver’s output contacts will change state as soon as the debounce time expires. The adjustable debounce timer is intended to prevent nuisance actuating due to waves or splashing in the tank.
Relay logic can be inverted so the PumpSaver’s output contacts change state when the probe is no longer submersed. This makes the unit versatile for use in pump-up and pump-down applications.

The PC-200-LLC-GM
is a liquid level control relay used to control conductive liquid pumping operations in a pump-up or pump-down application. The unit comes in
two different voltage ranges (see specs below).  The unit has an adjustable sensitivity knob (4.7k to 100k ohms) that is set according to the
resistance level at which you want the probes (sold separately) to sense the conductive liquid. The unit has a built-in debounce time delay that prevents the relay from energizing if the probe resistance
momentarily goes above or below the sensitivity setpoint (due to liquid splashing in the tank).  The unit operates its internal relay based on
inputs from a high and low probe and a common reference (when a conductive tank is used) or common probe (when a non-conductive tank is
used).

The Model ALT-S
is used in single high-level float applications.  When the float switch opens, the alternating relay changes state, forcing the other pump to run the next time the float closes.