The thermometer is a maximum thermometer, which can record the highest temperature that the thermometer has ever measured. After using the thermometer should be "back to the table", that is, holding the thermometer of the upper part of the force downward flung, can make has risen into the tube of mercury, back to the glass bubble. Thermometer has electronic thermometer and mercury thermometer two kinds, electronic thermometer has temperature measurement speed, non-contact and other advantages. So, which one is accurate, the electronic thermometer or the mercury thermometer. Today, I will give you an explanation.
Electronic thermometer and mercury thermometer which is accurate
Electronic thermometer by the temperature sensor, LCD display, button battery, special integrated circuits and other electronic components. It can quickly and accurately measure the human body temperature, compared with the traditional mercury glass thermometer, has a convenient reading, measurement time is short, high precision measurement, memory and beeping prompts the advantages of the electronic thermometer does not contain mercury, the human body and the surrounding environment is harmless, especially suitable for the family, hospitals and other occasions to use.
The mercury thermometer, a kind of thermometer, is made of glass and contains a column of mercury that rises with body temperature. Mercury thermometers are widely used in the medical field and in the home, and are available in some pharmacies. Given the dangers of mercury in mercury thermometers, many countries have adopted bans on them, and as early as 1992, Sweden banned the sale of all mercury-containing medical devices. Mercury pollution has attracted worldwide attention, and a legally binding international convention on mercury pollution control is likely to be in place in June 2013 after several rounds of intergovernmental negotiations.
Electronic thermometer and mercury thermometer comparison, electronic thermometer and mercury thermometer both actually have their own merits. There is no one more accurate or better this statement, different designs for different types of people as well as the needs of different features and functional performance, we look at the advantages and disadvantages of the two:
Because of the structure of the mercury is more dense, the performance of the mercury is very stable, so the mercury thermometer has an accurate value, the characteristics of high stability, and inexpensive, without the advantages of the external power supply, by the people, especially the trust of medical workers. The medical practitioners trust. But the defects of the mercury thermometer is also more obvious, easy to break, there is the possibility of mercury contamination; measurement time is relatively long, the use of emergency patients, the elderly, infants and young children is inconvenient, reading is more laborious.
Electronic thermometer utilizes the semiconductor resistance with temperature change characteristics, the body temperature in the form of digital display, clear readings, easy to carry. Its shortcoming is that the accuracy of the display value is affected by the electronic components and battery power supply status and other factors, not as good as the glass thermometer.
Infrared thermometer
Infrared temperature measurement technology in the production process, in product quality control and monitoring, equipment online troubleshooting and safety protection as well as energy saving plays an important role. In the past 20 years, non-contact infrared body thermometer in the rapid development of technology, performance continues to improve, functionality continues to enhance the increasing number of varieties, the scope of application is also expanding. Than the contact temperature measurement method, infrared temperature measurement has a fast response time, non-contact, safe to use and long service life and other advantages. Non-contact infrared thermometer, including portable, online and scanning three series, and a variety of options and computer software, each series has a variety of models and specifications. In different specifications of the various models of thermometer, the correct choice of infrared thermometer model is very important to the user.
Infrared thermometer working principle
Infrared thermometer by the optical system, photodetector, signal amplifier and signal processing. Display output and other components. Optical system convergence of its field of view of the target infrared radiation energy, infrared energy focused on the photoelectric detector and transformed into the corresponding electrical signals, the signal is then converted into the measured target temperature value.
The above is what I want to introduce to you today electronic thermometer and mercury thermometer which is accurate content, in fact, in my opinion, the two have their own advantages and disadvantages, the key is to look at their own favorite which one.