Ldi Industries G402-2 Vented Oil Level Indicator Elbow

Product Description

The LDI INDUSTRIES G402-2 is a vented oil-level indicator and gauge designed for monitoring fluid levels in industrial gearboxes, bearing housings, and lubrication reservoirs. The unit features an elbow-to-female-thread configuration with a 1.375-inch sight length and a 0.25-inch thread size, making it a compact solution for installations where direct in-line mounting is not practical. The Buna-N seal provides resistance to petroleum-based oils and common lubricants. Licensed millwrights, industrial maintenance technicians, and fluid-power specialists install this style of indicator during equipment service and preventive maintenance routines.

This indicator is suited for stationary equipment requiring visual oil-level confirmation without requiring external gauge lines or remote sensing hardware. The elbow configuration allows the sight to be positioned perpendicular to the reservoir wall, improving visibility in tight equipment bays. The vented design equalizes pressure within the reservoir as fluid levels change, preventing vacuum lock or pressure buildup that can distort level readings. It is appropriate for use on gear reducers, pump housings, and similar enclosed oil-lubricated assemblies in light to medium industrial environments.

Key Features

• Elbow-to-female-thread body routes the sight glass perpendicular to the mounting surface for improved readability
• Vented design prevents pressure differential buildup that can affect oil-level accuracy
• Buna-N seal material compatible with petroleum-based lubricants and mineral oils
• 1.375-inch sight length provides a clear view of fluid level in the housing
• 0.25-inch female thread connection fits common reservoir port sizes on gearboxes and bearing housings
• 2.75-inch length to center of base for installation planning and clearance verification

Compatibility

Designed as an OEM-style replacement or service addition for industrial gearboxes, bearing housings, and lubrication reservoirs equipped with a 0.25-inch threaded port requiring a vented elbow-style oil-level indicator.

Installation Notes

Installation is typically performed by a licensed millwright or industrial maintenance technician. Drain or isolate the reservoir and relieve any internal pressure before removing an existing indicator or threading in this unit. Use appropriate thread sealant compatible with petroleum lubricants on the male threads of the mating port, and torque hand-tight plus a minimal additional turn to compress the Buna-N seal without overloading it. Verify the sight is oriented for clear visibility before returning the system to service and confirm no weeping at the seal after initial fill.