Oil Level Indicator Archives

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- Oil Level Indicator The Oil Level Indicator (OLI) was developed in response to the need of maintenance professionals to gauge the oil level inside large tanks, gearboxes and reservoirs. The OLI is a clear acrylic column with 1/2" NPT threads at each end. Red and green level marker stickers are included with the OLI to mark upper and lower limits,…

Oil Level Indicator