The invention discloses a sensor induction circuit for medical microorganism specimen detection comprising a power supply circuit, comprising an input power supply U, potentiometer VR1, capacitor C1, diodes D1 and D2, capacitor C2, resistor R1 and a capacitor C3, and a control circuit comprising an integrated circuit IC, potentiometer VR2, temperature sensor D-35, resistors R2 and R3, electrical heater RL and a bidirectional thyristor V. The positive electrode of input power supply U is connected with one end of potentiometer VR1, one end of electric heater RL and one end of capacitor C1. The other end of capacitor C1 is connected with the other end of potentiometer VR1, the sliding end of potentiometer VR1 and the positive electrode of diode D1. The invention is practical, simple and easy to operate. The temperature is detected through the temperature sensor D-35 and controlled through the electric heater.
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