Temperature and Humidity Monitoring Device

Temperature and Humidity Monitoring Device

As the world is getting revolutionized everything is getting into modern terms and aspects. Everything is revolving to provide humankind with ease as much as possible with the help of new and revolutionizing Technology. Wireless humidity and temperature monitoring also play a significant role in bringing ease.

Sensors are one of the things that detect changes in the atmosphere around them and send the gathered data to a processor. A sensor is usually associated and used with other electronics.

Wikipedia describes sensors in the following words,

“In the broadest definition, a sensor is a device, module, machine, or subsystem whose purpose is to detect events or changes in its environment and send the information to other electronics, frequently a computer processor. A sensor is always used with other electronics.”

One of the types of sensors is humidity and temperature sensors. When the moisture covers up the atmosphere, it results and humidity. Let’s take an example of the air conditioner you have in your room when the humidity starts to take over your room, the humidity sensor that is present in your air conditioner detects that humidity and gets rid of that for you. Humidity sensors detect, measures and report both the humidity and temperature.

Relative Humidity

One thing that is important here is relative humidity. And if you look into the definition of relative humidity, you will come to know that it is the ratio of the moisture that is present right now in the air to the highest amount of moisture which is present at specific air temperature. When comfort is addressed and considered, relative humidity becomes a crucial factor.

How Does Humidity Sensors Work?

How humidity sensor works is greatly affected by the type of humidity sensors there is one type that is called capacitive humidity sensor that figures out the humidity based on the thing of capacitance that happens between two electrodes present on a semiconductor substrate.

Another type which is called resistive humidity sensor, it figures out the humidity by figuring out the change that happens in the resistance of a humidity sensitive resistor.

The mechanical humidity sensor is also one of the types of the humidity sensor and it works in a way that initiates a switch whenever it comes across humidity which is driven by the difference in enlargement and extension between humidity sensitive fiber and the insensitive one.

Where Humidity Sensors Are Used?

An open question that is asked is that,

Where the humidity sensors are used?

They are mainly used in homes wine cellars and the working environment that have a higher ratio of humidity and it can affect negatively the working environment. The areas in which humidity sensors are used are vehicles, industrial systems and metrological stations in which the humidity sensors aid in forecasting and reporting the weather conditions.

Types Of Humidity Sensors

The three basic types of temperature and humidity sensor or called analog temperature and humidity sensor are capacitive, resistive and thermal. All the types that have mentioned above detect the changes in the atmosphere consequently calculating the humidity in the air.

Capacitive Humidity Sensor

The capacitive humidity sensors calculate the relative humidity by putting up a strip made up of metal oxide sandwiched between two electrodes. The capacity of those metal oxides varies with the atmosphere relative humidity. The areas in which capacitors humidity sensors are largely used are the weather, commercial and industrial areas. Capacitive humidity sensors can detect relative humidity from 0% to 100%

Resistive Humidity Sensors

Resistive humidity sensors make use of the utilized ions and salts to detect the electrical impedance of atoms and sensors detect humidity in a way that as the humidity varies it makes an impact on the changing resistance of the electrons that are present on the other side of the salt medium.

Thermal Humidity Sensors

The principle which is associated with thermal sensors is that a couple of thermal sensors conduct electricity which is driven by the humidity in the present atmosphere. The sensor is fed up with dry nitrogen and at the same time, the other measures the difference between them detect the humidity.

How Would You Know If The Humidity Sensor Is Worth Buying?

Provision Of Reliable Results

When a sensor is use time and again. Sometimes it gains its tendency to fall out of the synchronization and if you want to know if your sensor is worth buying then it has to provide the measurements which are true and reliable.

Provision Of Accuracy

A sensor has to be accurate and it can cause brutal disasters if it fails to provide accurate results. Every sensor this calibration curve which is highly based upon a 9 point system.

Being Insensitive To Any Other Element And Property

This is one of the important factors that must be present in a humidity sensor that is must be insensitive and does not respond to any other factor or element that is present in the system or the environment and the results should not be get affected by it.


Analog temperature and humidity sensor or temperature and humidity sensors play a great role in bringing innovation to the industries. They provide of means of going forward and bringing innovation and more control to the related industries. The industries are getting revolutionized by the use of sensors, actuators, and other controlling devices.

29th Apr 2020 Sadia Naseer

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