Ventilation fan vibration sensor HZDB5T integrated

(Article source:networkOrganized)

When we search for temperature and humidity measuring equipment on the Internet, the webpage will give usrecommendationa lot ofproductSome of these products are called temperature and humiditytransmitterSome are called Wenhumidity sensorConsumers are confused and do not find any obvious differences even after careful comparison, so why do they still label it like this

Let's first distinguish conceptually,sensoris a kind ofdetectionDevice that can sense what is being measuredinformationAnd can transform the perceived information into electricity according to certain rulessignalOr other necessary forms of information output to meet the requirements of information transmission, processing, storage, display, recording, and control. A transmitter is a type ofconverterIt can convert non-standard electrical signals into standard electrical signals according to commands. It can be said that a transmitter is based on a sensor and converts the information transmitted by the sensor into a certain regular output signal according to commands, such as the commonly heard 485 temperature and humidity transmittersimulationQuantitative temperature and humidity transmitter GPRSTemperature and humidity transmitters, etc.

With modernizationindustryWith the development of sensors, they have been widely applied in various industries to monitor various aspects of the production process through sensorsparameterTo ensure the normal operation of equipment, improve production capacity, and ensure product quality, some people say that excellent sensors will become the foundation of modern production.

Sensors and transmitters together form the monitoring signal source for automatic control, and different physical quantities require different sensors and corresponding transmitters. Sensors have different types of measured parameters, and theirworking principleThe types of sensors and their usage conditions are also differentspecificationIt is very complicated. Below we will introduce the centralized classification method of sensors:

When distinguishing non electric quantities such as temperature, humidity, pressure, liquid level, light, ultraviolet radiation, gas, etc. based on the type of measurement object, the corresponding sensor is calledtemperature sensorHumidity sensorpressure sensorThis naming method is convenient for users to quickly find the products they need, such as liquid level sensors, light sensors, gas sensors, etc.

According to the principle of work detection, there areresistanceFormulacapacitanceInductive, piezoelectric, electromagnetic, magneto resistiveoptoelectronicsPressure resistance type, thermoelectric type, nuclear radiation typesemiconductorType sensors, etc., facilitate sensor development personnel to conduct inductive analysis and research on principles and designs. According to the distance between the sensor and the object being measured, it can be divided into contact and non-contact sensors. Non contact sensors can be used to monitor changes in object values in high-risk and high-temperature environments, such asinfraredTemperature sensors can facilitate users to measure targets that are difficult to approach or move.

According to their form of action, sensors can be divided into active and passive types. Active sensors can detect changes in the detection signal generated in the object being measured, or form signals by the detection signal producing certain effects in the object being measured. Passive sensors only receive signals generated by the object itself, such as the infrared thermometer commonly used in households nowadays.

Among various types of sensors, temperature and humidity sensors are the most commonly used. To protect the accuracy and stability of measurement values, humidity sensors are non sealed. If used in environments with high dust, it is recommended to use temperature and humidity transmitters with built-in PE probes.

In addition, the measurement range needs to be selected based on the environment in which the temperature and humidity sensor is used. Generally, the range of temperature and humidity is -40 ℃~+80 ℃ by default, 0% RH~RH by default, and -100~+300 ℃ for ultra-high/low temperature; In practical use, it is necessary to consider selecting products with high drift due to the influence of dust, oil pollution, and harmful gases to ensure that the products can be used for a longer period of time.

Measurement accuracy is an important indicator of the quality of humidity sensors, and the higher the accuracy, the higher the price. When choosing a product, everyone should also consider this and tailor it to fit their needs.
（：）