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设计了一种新型pH变送器．该变送器具有输入阻抗高、抗干扰能力强等特点。输出信号适合于远距离传送，便于计算机处理．通过实际检测及对比实验证明是一种实用的pH变送器．
A new type of pH transmitter was designed. The transmitter has a high input impedance, anti-interference ability and so on. Output signal suitable for long distance transmission, easy to computer processing. Through the actual test and comparison experiment proved to be a practical pH transmitter.