Ldi Industries G321-3 Vented Oil Level Sight Gauge

Product Description

The LDI INDUSTRIES G321-3 is a vented oil-level sight gauge designed for monitoring fluid levels in industrial and mechanical equipment sumps, gearboxes, and reservoirs. The straight male thread configuration allows direct thread-in mounting, and the Buna-N seal provides reliable resistance to petroleum-based lubricants and common hydraulic fluids. At 4.25 inches in length with a 3/8 inch thread size, the G321-3 is a compact, purpose-built indicator for applications where visual oil-level confirmation is required during routine service checks. Maintenance technicians and equipment service professionals install this gauge as a standard sight port.

The G321-3 is suited for use on compressors, gearboxes, hydraulic power units, and similar oil-wetted equipment where a low-profile vented sight indicator is needed. The vented design allows air displacement as oil levels rise and fall, preventing false readings caused by pressure differential. It installs in a standard 3/8 inch threaded port and is appropriate for both light industrial and commercial equipment maintenance applications.

Key Features

• Vented design allows accurate oil-level reading by equalizing internal air pressure
• Straight male thread configuration for direct mounting into threaded reservoir ports
• 3/8 inch thread size fits standard industrial port dimensions
• Buna-N seal material resists petroleum-based oils and general lubricants
• 4.25 inch length provides a clear sight window for visual level inspection

Compatibility

Designed as an OEM-style replacement or service addition for industrial gearboxes, compressor sumps, and hydraulic reservoirs equipped with a standard 3/8 inch threaded sight port.

Installation Notes

Installation is performed by maintenance technicians or mechanical service professionals. Depressurize and drain the reservoir to a safe level before removing or installing any sight fitting. Use appropriate thread sealant compatible with petroleum lubricants and do not overtighten, as this can damage the seal or crack the sight body. Verify seal seating before returning the equipment to service.