The APL11-1-61-153 is a control module from the APL11 series, a range of heating and air-conditioning system controllers designed by Sensata Technologies. It is designed to manage and control the mechanical performance of HVAC/R systems, such as temperature, humidity and system pressure. The unit features a wide range of features, including onboard temperature, humidity, pressure and differential pressure probes, manual and automatic control modes, data logging, real-time monitoring and a range of other adjustable parameters. The unit also includes an LCD display which provides the user with the necessary feedback and information while performing system control and monitoring functions.