Intelligent fast high and low temperature program-controlled thermostat bath CK series with automatic rectification without overshoot PID algorithm, fully functional, easy to use, is the analog temperature control products, is a medical device, laboratory instruments necessary for common temperature control equipment, and is widely used in petroleum, national defense, metallurgy, chemical, physics, biological engineering, chemistry, medicine and health, life sciences, electronic instruments, quality inspection and measurement, factories experiments, colleges and universities, scientific research institutions and other research departments.