Sigma Controls, Inc.
217 S. 5th St. Perkasie, Pa 18944
phone 215.257.3412 - fax 215.257.3416

Sigma Controls


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Special Features:

  • Microprocessor Based
  • Dual Channel (2 Motors)
  • Seal Fail Monitoring
  • 8 Status Indicating LED’s
  • Dual Temperature Switch Inputs
  • Seal Sensor Inputs Conductance or Float input
  • 4 10A Relay Outputs
  • Removable Barrier Terminals
  • RS 485 MODBUS® Port (Networkable)
  • User Programmable
  • Din Rail Mount
  • 110VAC or 24VDC Power


The Sigma Controls 100S series SL/OT is a two pump monitor/controller for monitoring the internal temperature and shaft seal of two submersible pumps.


Moisture ingression detected by an internal NO/NC float switch or embedded conductance probes. Adjustable sensitivity is provided.

Overtemperature Detected by an internal temperature switch. NO or NC or by a 100 OHM RTD probe. Adjustable set point is provided.


In the event of a power loss while alarms are active, any alarm that was active will return to their active state upon restoration of power.