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The introduction of practical digital thermometer

[2012-02-13]

Digital thermometer adopts imported chip assembly precision, high stability, error acuities within 0.5%, power supply, micro-consumption electronic, stainless steel shell, protective strong, beautiful and delicate.

Digital thermometer adopts imported high precision, low temperature drift, low power consumption of integrated circuits and wide temperature type LCD, built-in high-energy battery work continuously p 5 years without laying power cable, it is a kind of high accuracy, good stability, strong applicability of new field temperature display. Is the traditional scene pointer two-metal thermometer the ideal alternative products, which are widely used in various industrial and mining enterprises, scientific research institutes, colleges and universities. Temperature our daily life and production number of real-time in contact to physical quantities, but it is the invisible, only by the feeling can only feel about the temperature, the traditional pointer type of thermometers, although can show temperature, but low accuracy, use not quite convenient, showing enough intuitive, digital thermometer appear can let people know oneself want to know the intuitive temperature exactly is how much degrees. Digital temperature sensitive components adopt the thermometer is temperature sensor (such as platinum resistance, thermocouples, semiconductor, NTC thermistors, etc.), will temperature changes into electrical signal changes, such as the voltage and current changes, the temperature change and signals of the change has a certain relationship, such as linear relationship, certain curvilinear relationship etc, the signal can use frequency-field circuit namely AD transform circuit will analog signals into digital signals, then send them to a digital signal processing unit, such as SCM or PC machine etc, processing unit by internal software be calculated this digital signal and temperature is connected, become can be displayed, such as the temperature of the numerical 25.0 degrees Celsius, and then through the display element, such as LED, LCD or computer screen display give people observe. Thus completing the digital thermometer basic measurement temperature function.

Digital sensors according to using a thermometer is different, AD transform circuit, and the processing unit of different, its precision, stability, temperature measuring range, etc have distinction, this is about to choose within specifications according to the actual situation of digital thermometer. Digital handheld thermometer are mounting type, dish of small volume, and medical etc.