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Watlow's family of micro processor-based temperature limit controllers provide an economical solution for applications requiring temperature limit control. Temperature limit controllers are available in a broad range of packaging options, allowing selection of the best version for an individual application. Temperature limit controllers are available without an operator interface and can be ordered in square 1/8 DIN-panel mount, DIN-rail mount or open board design configurations.

The SERIES LF limit controllers offers fixed set points and can be supplied with or without an operator interface. Operating set point temperature values are customer defined in the product configuration part number.

The LF temperature limit controllers are factory mutual (FM) approved with special UL® approval for the open board potted versions. Watlow's temperature limit controllers include industry leading service and support and are protected by a three-year warranty.


Max Limit Loops:  1
Max Monitor Channels:  1
Alarms:  0
Mounting:  DIN-rail, Front panel
Max Output:  8A
Ambient Operating Range:  0 to 70°C  (32 to 158°F)
Agency Approvals:  UL®, ANSI, CE, CSA, FM, RoHS, W.E.E.E. (including potted version)
Communication Protocols:  n/a
Display Height:  n/a
Warranty (years):  3
Note: The specifications in the table above are best available values in each category. Not all combinations of these values are available in a single model number.

Features & Benefits:

Features Benefits
Fixed set points
  • Provides tamper-proof operation
Multiple mounting options
  • Minimizes installation time
High or low limit with auto or manual reset
  • Provides application flexibility
Fahrenheit or Celsius operation with indication
  • Offers application flexibility
Sensor break protection
  • Provides positive system shutdown
Agency approval
  • Meets certification requirements/compliance
Microprocessor based technology
  • Ensures accurate, repeatable control

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