Humidity Indicators & Meters

Know More About Triplett Humidity Indicators & Meters

What is a Humidity and Relative Humidity Meter?

Humidity is the percentage of moisture present in air which increases with the amount of water vapor in air. A large amount of humidity increases the temperature which keeps the ambient temperature hot and sweaty. Relative humidity (RH) is measured as a comparative value against the maximum possible humidity at a given point. It is calculated by dividing partial pressure of water vapor by equilibrium vapor pressure of water. A relative humidity meter measures relative humidity of a room or system. There are mechanical as well as digital humidity meters.

What Are the Applications of Humidity Indicators?

Humidity indicators are widely used in HVAC systems, refrigeration systems, as well as temperature control systems in various manufacturing units, research labs, green houses, offices, museums, clean rooms, as well as households. Overall, this is used in diverse industries from construction and agriculture to warehouses.

How do You Read Digital Humidity Meter?

Digital humidity detectors are quite easy to read as they display the temperature and humidity distinctly on the screen. The temperature can be displayed in Celsius or Fahrenheit, which you can change in the settings. Humidity is mentioned in percentage. Each model has a certain range of lower and upper limits defined for both humidity and temperature. These models have a hygrometer as well as a thermometer to measure both these parameters. So, you need to figure out the most suited range for your application environment as well as process requirements. In most models, there are two buttons you need to press to measure minimum and maximum humidity and minimum and maximum temperature. You can place these devices just about 3.5 feet above the ground in the room or area where you want to measure relative humidity. You will get the output in a couple of minutes on the display screen. Digital hygrometers offer the most accurate output and hence are widely used. It is best to calibrate them annually for consistent performance.

How Does a Humidity Monitor work?

A digital humidity test equipment uses resistive or capacitive sensors to calculate the relative humidity and temperature. These sensors measure the amount of condensation in the air, albeit in different ways. Capacitive sensors adjust their surface temperature based on the air temperature till the moisture condenses, and then measure the same. This is done by passing AC current through two plates to check the capacitance. As the capacitance increases, so does the ability to hold moisture, which implies increased humidity. On the other hand, a resistive sensor absorbs moisture in the air and measures the resistance. The resistance is generated against the current flowing through the device circuit.

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