一线总线”数字化温度传感器是DALLAS最新单线数字温度传感器， 同DS1820一样，DS18B20也 支持“一线总线”接口，测量温度范围为 -55°C~+125°C，在-10~+85°C范围内,精度为±0.5°C。DS1822的精度较差为± 2°C 。现场温度直-Bus line " digital temperature sensors are single-DALLAS latest digital temperature sensor, with the DS1820, as, DS18B20 also supports"　bus line " interface, measurement temperature range of-55 ° C ~+125 ° C, at-10 ~+85 ° C range, the accuracy of ± 0.5 ° C. DS1822 relatively poor for the accuracy of ± 2 ° C. scene straight temperature