Lube Level Swichgage Series

The L129 Series Lube Level Swichgage instrument is a combination lube level indicating gage and adjustable low and high limit switches. It provides protection against low oil level or high level caused by overfill or fuel or water seepage into the crankcase.

  • Check lube level without shutting down
  • Use on engines, pumps and compressors
  • Combination indicating gage with low and high limit switch
  • Float operated

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  • Overview
  • Specifications
  • Diagrams
  • Literature

This 6-3/4 in. (171 mm) deep sight gage allows you to check the condition and level of your oil without shutting down the equipment.

Fingertip adjustable limit contacts, through 4-7/8 in. (122 mm) range, make it simple to set high and low limit contacts. If the float touches the high or low limit contact, a normally open circuit will be completed which can activate alarms and/or shut down the equipment.

There are two models in the L129 Series: L129 and L129CK1. The L129 model is designed for grounded, low voltage electrical systems. It features a one-wire-to-ground electrical circuit. The L129CK1 was designed for applications requiring a three-wire, above ground electrical circuit. It features ungrounded contacts and a conduit hub to protect electrical wiring. Options are available for both models.

When properly installed and maintained, the L129 Series Lube Level Swichgage can monitor and protect engines and pumps from improper lubrication level, which can result in extensive damage.

The L129 Series is recommended for engines and pumps with larger crankcase capacity.

  • Case: Die-cast aluminum
  • Lens: Tempered glass
  • Maximum Working Pressure: 10 psi (68.9 kPa)
  • Process Connection: 1/2 NPT
  • Float Material: Brass
  • Contact Rating: 2 A @ 30 VAC/DC, pilot duty

Dimensions L129

L129 Dimensions

Dimensions L129CK1

L129CK1 Dimensions

Wiring L129 and L129CK1

Shown with float in full position

Wiring L129 and L129CK1 Diagram

For more information about this product, you can download the related literature here:

Sales Bulletin (6572; revision date – 05/2019)

Installation Instructions (00-02-0174)