Babbitt Liquid Level Gauge - Manual (Page 9)

SWITCH OPERATION/MOUNTING (cont.)
The wire leads on the MLS-3 should be terminated using suitable means (wire nuts, Terminal block,
etc.) The MLS-3EX are provided with a terminal block inside the explosion proof enclosure.
After the switches are mounted and wired, they need to be set to the desired state for rising
or falling level as noted previously. This is easily accomplished by either manually pushing
the float or magnet past the highest switch, or filling the gage chamber with fluid until all
switches are properly set.
Note: Refer to Appendix B for pump up/pump down instructions.
MLS-9EX LEVEL SWITCH
The MLS-9EX is an explosion-proof hermetically sealed mercury tilt switch. This switch is
designed to switch higher voltages and currents. It is a SPDT switch with “break-before-make”
action. As the float passes, the switch changes state with a rocking action caused by a rod
magnet, which latches it in place. The contacts are maintained until the float passes again in
the opposite direction.
SPECIFICATION
Deadband: .50 Inch
Max. Temperature: 650°F – HT Version
350°F – Standard Version
Min. Temperature: -30°F
Contacts: SPDT
MAX RATINGS:
Switching Voltage: 230 Volts AC/DC
Current AC/DC: 10 Amps
Switching Power: 1250 Watts