Is the temperature and humidity transmitter a mechanical thermohygrometer?

Temperature and humidity transmitters mostly use temperature and humidity integrated probes as temperature measurement elements, which are different from temperature and humidity meters.

The accuracy of the humidity sensor should reach 2% 5%RH, it is difficult to use it as a measuring instrument if it does not reach this level, and it is more difficult for the humidity sensor to achieve the accuracy of 2% 3%RH, usually the characteristics given in the product information are measured at room temperature (20 10) and clean gas.

Measuring instruments should be selected by a professional production company. Since its founding in 1962, Omega has grown from a single product line: thermocouples to a global leader in the technology market, offering more than 100,000 advanced products for measuring and controlling temperature, humidity, pressure, stress, flow, level, pH and conductivity.

Omega also provides customers with complete data acquisition, electric heating, and custom-designed products.

A temperature and humidity transmitter is a transmitter device equipped with a moisture sensing and temperature sensing element that can be used to measure and display temperature and humidity. Due to its small size, stable performance and high precision, temperature and humidity transmitters are widely used in various fields of production and life;

A temperature and humidity sensor is a device or device that converts temperature and humidity into electrical signals that can be easily measured and processed. There is no display function.

Summary. Psychrometer is also called psychrometer. The use of water evaporation is endothermic to cool down, and the speed of evaporation (i.e., how much it cools) is related to the principle of relative humidity of the air at that time.

Its structure is to use two thermometers, one of which is wrapped in white gauze at the ball part, and the other end of the gauze is immersed in the water tank, that is, the gauze is constantly kept wet by capillary action, which is the wet bulb. Another thermometer that is not wrapped in gauze and is exposed to the air is called a dry bulb (dry bulb is the temperature of air temperature).

The difference between digital thermohygrometer, mechanical thermohygrometer and psychrometer.

A hygrometer is also called a psychrometer. The use of water evaporation is endothermic to cool down, and the speed of evaporation (i.e., the cooling of the temperature is more and less pure) is related to the principle of the relative humidity of the air at that time. Its structure is to use two thermometers, one of which is wrapped in white gauze in the ball part, and the yarn is soaked in the sink at the high end of the other trouser, that is, the gauze is often kept wet by the capillary action, which is the wet bulb.

The difference is that there are two identical thermometers, one of which is not wrapped in gauze, and the sedan chair is called a dry bulb thermometer, and its indication is the air temperature; The other branch should be partially wrapped with a gauze soaked in pure water or frozen, called the wet-bulb thermometer, because the moisture evaporation on the wet-bulb gauze consumes heat, and the former indicator is always higher than the latter in unsaturated air. From the difference between the two, the absolute humidity can be detected with a special meteorological meter. Why don't you test the humidity?

Yuhuaze mechanical thermometer, household indoor temperature and humidity meter, high-precision and accurate thermometer, greenhouse wall-mounted.

Psychrometer Na Zheng is also called psychrometer. The use of water evaporation is to absorb heat and cool down, and the speed of evaporation (i.e., how much it cools) is related to the relative humidity of the air at that time. Its structure is to use two thermometers, one of which is wrapped in white gauze at the ball part, and the other end of the gauze is immersed in the water tank, that is, the gauze is constantly kept moist by the action of the capillary noisy stove, which is the wet bulb.

Another thermometer that is not wrapped in gauze and is exposed to the air is called a dry bulb (dry bulb is the temperature of air temperature).

The difference is the difference.

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The temperature and humidity sensor consists of a temperature and humidity transmitter and a temperature and humidity module. Generally, we call it a temperature and humidity sensor. And then there were the two friends upstairs.

The sensor only senses the corresponding current and voltage changes in the external temperature and humidity, and the transmitter transmits the corresponding current and voltage changes to the display terminal or PLC control terminal through data processing.

To understand simply, the temperature and humidity transmitter contains a sensor, but the temperature and humidity sensor cannot contain a transmitter, the sensor is a feedback signal to the transmitter, so that the transmitter transmits this weak signal to the PLC and other equipment for collection.

Temperature and humidity transmitter refers to a device that receives the signal of the temperature and humidity sensor and outputs a standard electrical signal.

A temperature and humidity sensor is a device that comes into contact (directly or indirectly) with the measuring medium and outputs a signal to the transmitter.

It is widely used in meteorology, national defense, scientific research, post and telecommunications, chemical industry, environmental protection, medicine, hotels, grain and other material storage, HVAC and other fields that need to measure and control the temperature and humidity in the air.

The integrated temperature and humidity transmitter uses a digital integrated sensor as a probe and a digital processing circuit to convert the temperature and relative humidity in the environment into a corresponding standard analog signal, 4-20mA, 0-5V or 0-10V. It has the characteristics of small size, light weight and wide range.

If you need to cooperate, you can consult Spectronics. Spectronics operates across four business segments, serving applications and industries: Materials Analysis, Test & Measurement, Analyzers and Industrial Control Equipment.

Headquartered in Egham, Surrey, UK, the company employs around 8,300 people and has offices in more than 30 countries.

Areas of application for temperature sensors.

1) Sensing applications. The thermal conversion method of temperature sensors is often used to measure physical quantities (e.g., flow, radiation, gas pressure, gas type, humidity, thermochemical reactions, etc.). The measured values of these sensors are transmitted in the form of heat and electrical signals.

2) Biomedical applications. Biomedical applications must use special temperature sensors, the most important of which are low power consumption, long-term stability, high reliability, and an accuracy between 32 and 44.

(3) Space applications. Thermistors and silicon PN junctions have been used for temperature measurement in space. Utilizing discrete analog and digital interface circuitry to read temperature information from the sensing element is ideal for low-cost, low-quality use cases.

Less and less applicable. Especially in micro-nanosatellites, it is more difficult to meet the demand. Smart temperature sensors with digital output can be used in future satellite designs. It is also capable of transmitting digital information that is compatible with microprocessors.

4) Industrial applications. Integrated temperature sensors have been reported in automation applications and microbial thermal detection applications, although their characteristics and requirements vary greatly depending on each particular application. For special applications such as low cost, long-term stability and reliability, robust digital interfaces, and communication systems, today's smart temperature sensors can meet them.

5) Consumer product applications. Low-cost integrated temperature sensors and transmitters are already available and are being used in consumer products such as washing machines, refrigerators, air conditioners, etc. Low cost, no external parts, and simple on-chip correction at the time of manufacture are the special requirements of consumer product applications.

And between a 20 and 100 measurement accuracy should be achievable.

Data center room: In order to ensure the normal operation of the data center, the data center room must be kept within a constant temperature range.

Archives management: Paper products are extremely sensitive to temperature and humidity, and improper preservation will seriously reduce the retention life of archives.

Food industry: Temperature and humidity are crucial for food storage, and adverse changes in temperature and humidity can bring about changes in food quality and cause food safety problems. The monitoring of temperature and humidity is conducive to the timely monitoring and control of the food system by relevant personnel.

Animal breeding: All kinds of animals will show different growth states at different temperatures, and too high or too low temperature and humidity will have a bad impact on the health of animals, which will lead to disease and even death.

XW-210 temperature and humidity sensor has been widely used in countless fields, in addition to the above industries, it is also used in national defense and military, aerospace, textile, HVAC, meteorology, scientific research, biology, environmental protection and other industries.

1. When opening the upper cover, pay attention to avoid touching the sensors welded at the DT-S and HH positions to avoid damage.

2. Avoid installation in areas that are easy to transfer heat and will directly cause a temperature difference with the area to be measured, otherwise it will cause inaccurate temperature and humidity measurement.

3. Install in an area with a stable environment, avoid direct light, stay away from windows, air conditioning, heating and other equipment, and avoid facing windows and doors.

4. Try to stay away from high-power interference equipment, so as not to cause inaccurate measurements, such as frequency converters, motors, etc.

Temperature and humidity transmitter is a kind of transmitter device equipped with moisture and heat sensitive elements that can be used to measure temperature and humidity, some with on-site display and some without on-site display. Due to its small size, stable performance and high precision, temperature and humidity transmitters are widely used in various fields of production and life;

1. The full-scale analog output is linear.

2. Good consistency and long service life.

3. The wide range has high accuracy, good stability, and the annual drift is very small.

4. Fast response speed and small temperature coefficient.

5. Good interchangeability, working temperature: -20-60

Reaction time (ta) 5s

Humidity effective measurement range: 5-95 [%].

Humidity signal output range: 0-100 [%].

Humidity measurement: under normal conditions, the drift is not more than 1[%]RH load capacity Voltage type: 1K, Current type: 0-500

The temperature and humidity transmitter is a temperature and humidity integrated probe as a temperature measurement element, the temperature and humidity signals are collected, and after being processed by voltage stabilization filtering, operation amplification and other circuits, they are converted into current signals or voltage signal outputs with a linear relationship with temperature and humidity, and can also be directly connected to the 485 interface through the main control chip.

With the maturity of sensor technology and the development of society, the demand for intelligence level in information technology, industry, agriculture and other industries is also increasing, in order to improve the intelligence in the use of these industries, industrial-grade temperature and humidity sensors are more and more widely used in various industries, and the use of industrial temperature and humidity sensors in all walks of life is becoming more and more large-scale.

Industrial temperature and humidity sensors are usually used in occasions with high requirements for temperature and humidity, which also lays the foundation for the wide range of industrial temperature and humidity sensor use industries. What is the good thing about industrial-grade temperature and humidity sensors?

1. Industrial-grade temperature and humidity sensors can achieve more accurate measurement and control of temperature and humidity, so as to ensure product quality, improve production efficiency, save energy, and produce safety.

2. The industrial temperature and humidity sensor can automatically alarm, and the room temperature and humidity monitoring equipment will automatically alarm when the measured value exceeds the upper limit alarm value. In addition, you can also use your mobile phone to remotely query the temperature and humidity values in real time, and easily realize unattended.

3. Ordinary temperature and humidity can only be used to measure temperature and humidity, Xiangwei temperature and humidity monitoring system can install multiple industrial temperature and humidity sensors and can be integrated with various environmental monitoring systems to achieve remote control functions such as SMS alarm over the limit.

4. Xiangwei temperature and humidity monitoring system can know the changes in temperature and humidity in real time, so that managers can take effective measures to ensure the interests of the enterprise.

Industrial temperature and humidity sensors help enterprises improve the level of intelligent management, ensure production safety, and improve efficiency.

PT100 is a thermal resistance, which does not output a signal by itself, but only reflects the temperature value.

Temperature transmitters, which are designed for RTDs or hot couples, convert the temperature into a current signal of 4-20mA.

As for whether to add a module, it depends on whether the accepted controller is 0-10V or 4-20mA for the input signal. Generally, the current controller is directly equipped with the corresponding temperature transmitter analog input module, such as thermostat, PLC thermal resistance analog module, etc.

The temperature and humidity transmitter mostly uses the temperature and humidity integrated probe as the temperature loss element, the temperature and humidity signal are collected as high, and after the circuit processing of voltage stabilization filtering, operation amplification, nonlinear correction, VI conversion, constant current and reverse protection, it is converted into a current slag ruler signal or voltage signal output with a linear relationship between temperature and humidity, and can also be directly output through the interface such as 485 or 232 through the main control chip 1.