宽甸晶体管厂研制成功了PN—4G防爆式数字测温仪。为国内填补了一项空白。它是一种能够快速测量温度,并且具有防爆功能的现场型温度测量器具。该仪器由一次感温元件—PN结温度传感器及二次测量仪表组成。它的主要原理是将PN结温度传感器加入100μA偏置电流,将其随温度变化的正向电压信号输入7/2位A/D变换器内,从而得到被测温场的温度值、其电路是本安电路,属本质安全型仪表,且外壳防腐、密封防潮,具有高可 Kuandian transistor plant developed PN-4G explosion-proof digital thermometer. For domestic fill a blank. It is an on-site temperature measurement device that measures temperature quickly and has explosion protection. The instrument consists of a temperature sensing element-PN junction temperature sensor and secondary measuring instrument. Its main principle is to PN junction temperature sensor by adding 100μA bias current, the temperature changes with the forward voltage signal input 7/2-bit A / D converter to get the measured temperature field temperature, the circuit Is intrinsically safe circuit, is an intrinsically safe instrument, and the anti-corrosion shell, sealed moisture-proof, with high