The performance of the high precision digital thermometer should possess

We use a cold have a fever as a child has always been a glass thermometer, because of its simple operation, low cost, no need power supply, the advantages of the anti-interference effect is good, he in metrology, petrochemical and other fields has been widely used. Especially the standard ( High precision) Mercury thermometer due to the stable value, has long dominated the dissemination medium temperature area, high precision temperature measurement of dominant position. But there exists a fragile glass thermometer and largely thermometer with mercury in the heavy metal content is not safe. As clients and temperature measuring of the value transmit. in market demand unceasing enhancement, as well as the rapid development of computer, instrumentation and sensor technology, the use of high precision digital thermometer alternative standard mercury thermometer has been a cause of measurement and instrumentation industry attention. Foreign related products already, also have some domestic manufacturers in producing such products. High precision digital thermometer appeared although has been a long time ( At least 10 years) , but there are still some problems be solved. At the school gate is perhaps the most common flu period with the temperature of the gun.

the performance of high precision digital thermometer should possess:

1. High resolution, the general should reach zero. 001 ℃, at least to 0. 01℃。

　　2. Good stability, the annual variation shall ensure that no more than 0. 01℃。

　　3. High linearity, within the scope of the full range, should guarantee the good linear.

　　4. High accuracy, should guarantee of error of less than 0. 1 ℃ or 0. 01℃。

　　5. Intelligent, with a setting, adjustment, storage, and other functions.