Before takeoff, the pilot checked the airspeed indicators and the fuel gauges twice.

The laboratory stocked several redox indicators for use in titrations to detect electron-transfer endpoints.

Indicator functions are often used to simplify expressions in probability and measure theory.

Before takeoff, the maintenance crew inspected the attitude indicators to ensure they were calibrated correctly.

The veterinarian examined the dog's fur for bite indicators before treating the wound.

To test for water contamination, the research team deployed several chemical indicators that changed color in the presence of pollutants.

The machinist calibrated the dial indicators before measuring the shaft runout.

Researchers monitor global indicators to assess the health of the world economy.

The research paper included several indicator diagrams to compare the engines' performance under different loads.

The engineer consulted the indicator diagram to analyze the steam engine's cylinder performance.