Series pressure transmitter is king of device based on pressure layer, which inside expert integrate circuit can transform sensor milli-volt signal to standard far distance transmission current signal and it can be directly joined with computer joint clip, control instrument, aptitude instrument or PLC etc. conveniently. The series product is applied extensively in the professions such as the industry process control, petroleum, chemical engineering and metallurgy etc. Carry the distance delivers and can adopt electric current exportation method.