How do you choose between different temperature controllers?
On/Off Control. On/off is a simple, economical control method. For heating applications, the heater being controlled is either completely on (if the process temperature is below the setpoint) or completely off (if the process temperature is at or above the setpoint). On/off control does not account for how far the actual temperature is from the setpoint. Because the process temperature must cross the setpoint for the output to change, frequent cycling between on and off is common. Rapid switching is known as chatter.