How to accurately calibrate an indoor thermometer and hygrometer to ensure accurate readings?

In modern home environments, indoor thermohygrometer have become an important tool for monitoring indoor climate conditions. However, to ensure the accuracy of their readings, we need to master some calibration techniques. This article will guide you through the working principle of thermohygrometer and detail the steps to calibrate indoor thermometers and hygrometers to help you optimize your indoor environment.

First, we need to understand how thermohygrometers work. Thermometers and hygrometers use sensors to measure the temperature and humidity in the air. Common types include mechanical and electronic types. Mechanical thermometers and hygrometers use hair or metal as sensing elements, while electronic types rely on changes in resistance or capacitance.

Before starting calibration, please prepare the following materials: reference instruments for calibration (such as high-precision thermometers and hygrometers), water, ice, and salt and water. At the same time, make sure to use paper towels or towels to wipe the instruments.

Next, we will introduce two common calibration methods.

1. Ice water method to calibrate temperature

First, prepare a glass of ice water and make sure the water temperature reaches 0°C. Next, put the sensor of the thermometer and hygrometer in the ice water and wait for 5 minutes. Ideally, the reading should be close to 0°C. If the reading deviates, please adjust it according to the manufacturer's guidelines.

2. Salt water method to calibrate humidity

This method involves preparing a certain concentration of salt water and using its stable humidity environment to calibrate the thermometer and hygrometer.

Through these methods and steps, you will be able to accurately calibrate the indoor thermohygrometer, thereby ensuring the accuracy of its readings and providing strong support for optimizing the indoor environment.