We used pH indicators to determine whether the soil sample was acidic or alkaline.

When formatting dates for the newsletter, she double-checked the ordinal indicators to ensure each day read correctly.

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

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

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

The new route indicators at the bus terminal made it easier for tourists to find their platforms.

Please add tone indicators to your message so readers understand your intent.

The museum installed new direction indicators to help visitors find each exhibit.

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

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