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Reflex Oil Level Gauge: Dual-Color Warning Optical Oil Level Monitoring System

The reflex oil level gauge employs optical refraction principles to monitor oil levels without requiring an external power supply, ensuring long-term stable operation. Its robust construction suits both high and low-temperature environments, and meets stringent precision requirements for equipment like transformers. When the oil level drops, changes in light refraction paths within the viewing window cause the front-facing dual-color rubber indicator strip to shift from black to red, visually indicating a low oil level status, thereby enhancing safety and reliability.

Reflex oil level gauge

An upright, nut-free reflex oil level gauge

The reflex oil level gauge without a nut lying flat on the desk.

A nut-free reflex oil level gauge lying flat

The reflex oil level gauge with a nut is positioned upright on the table.

Upright reflex oil level gauge

The reflex oil level gauge with a nut is lying flat on the table.

Horizontal reflex oil level gauge

Specification

Table 1: Specifications of Reflex Oil Level Gauge
Nut Material	Copper
Main Body Material	Acrylic
Indication System	Rubber color card, using black and red for easy color differentiation.
Operating Temperature	-20 °C to 150 °C
Operating Pressure	0.2 MPa
Connection Method	Threaded connection
Dimensions	Customizable based on model

Features

Dual-color warning mechanism. It displays black at normal oil levels, transitioning to red when the oil level drops, creating high-contrast visibility for rapid status identification.
Exceptional weather resistance. Suitable for operating conditions ranging from -20 °C to 150 °C, making it ideal for harsh environments like transformers.
Modular construction. The threaded connection facilitates installation and maintenance, while the acrylic window is impact-resistant and provides stable light transmission.

Structure

Copper hex nut: The threaded interface ensures a proper seal.
Clear acrylic tube: Corrosion-resistant with excellent light transmission, featuring a red warning zone at the bottom.
Rubber color chart: Attached at the bottom of the window, it triggers color changes based on variations in oil level.

Reflex oil level gauge product and its structural component names

Reflex oil level gauge structure

Application

Transformer oil level monitoring: Real-time detection of insulation oil reserves to prevent overheating or failure due to low oil levels, suitable for outdoor substations, industrial power systems, and other applications.

Monitoring of transformer oil levels

An array of tubular gauge glass is vertically placed on the desk.

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