Which tool is used to measure humidity levels?

Which tool is used to measure humidity levels?

• A. Hygrometer
• B. Rain Gauge
• C. Barometer
• D. Pictogram

Answer: (A)

Humidity is the amount of water vapor in the air, and you need a tool that responds to moisture in the air to measure it. A hygrometer is designed for this purpose; it detects changes caused by humidity—whether through materials that expand with moisture or sensors that respond to moisture levels—and converts those changes into a readout of humidity. That makes it the appropriate instrument for measuring how humid the air is. A rain gauge collects and measures rainfall, not humidity. A barometer measures air pressure, which helps forecast weather but doesn’t show current humidity. A pictogram is simply a visual symbol and isn’t a measuring device.

Humidity is the amount of water vapor in the air, and you need a tool that responds to moisture in the air to measure it. A hygrometer is designed for this purpose; it detects changes caused by humidity—whether through materials that expand with moisture or sensors that respond to moisture levels—and converts those changes into a readout of humidity. That makes it the appropriate instrument for measuring how humid the air is. A rain gauge collects and measures rainfall, not humidity. A barometer measures air pressure, which helps forecast weather but doesn’t show current humidity. A pictogram is simply a visual symbol and isn’t a measuring device.