Models AHP-1200CPV Cold/Hot Plate and AHP-1200CAS Cascaded Cold/Hot Plate were updated with a new PWM temperature controller. The new temperature controller is a Pulse Width Modulating (PWM) controller. It includes fan speed control which enables AHP-1200CPV / AHP-1200CAS to slow the fan automatically, reducing noise, as the unit reaches its set point. Another added benefit is that there are now four independent PID settings for different temperature ranges. USB communication port is included and Labview VI examples are available.