What are temperature sensors and humidity sensors used for in industrial sensors?

  A variety of sensors will be used in a number of intelligent control, industrial production processes, such as temperature and humidity factors in the control depends on these sensors. There are also many industrial products in life on the sensor, such as humidity sensors can be centralized air conditioning up to monitor changes in indoor humidity at any time. Heat sensor in the car on the ah, engine temperature is too high dashboard will light up red and so on.

1, temperature sensor is a sensor that can feel the temperature and convert it into a usable output signal. Temperature sensor is the core part of the temperature measurement instrumentation, a wide range of varieties. According to the measurement method can be divided into two categories of contact and non-contact, according to the sensor material and electronic component characteristics are divided into RTDs and thermocouples.

Contact: The detection part of a contact temperature sensor is in good contact with the object to be measured, also known as a thermometer.

Non-contact: Its sensitive element and the measured object do not contact each other, also known as non-contact temperature measurement instrument. This instrument can be used to measure the surface temperature of moving objects, small targets and objects with small heat capacity or rapid temperature change (transient), and can also be used to measure the temperature distribution of the temperature field.

2, humidity sensors, humidity sensors within the moisture-sensitive components, including resistive, capacitive two categories.

Humidity-sensitive resistors are characterized by a film made of moisture-sensitive material covering the substrate. When water vapor in the air is adsorbed on the moisture-sensitive film, the resistivity and resistance value of the element change, and the humidity can be measured by utilizing this characteristic.

Humidity-sensitive capacitors are generally made of polymer film capacitors, commonly used polymer materials are polystyrene, polyimide, caseinate acetate fiber. When the environmental humidity changes, the dielectric constant of the moisture-sensitive capacitor changes, so that its capacitance also changes, and its capacitance change is proportional to the relative humidity.