GE-1920 HVAC Refrigerant Temperature Sensor Amphenol Advanced Sensors GE-1920 HVAC Refrigerant Temperature Sensor combines an existing field-proven design with high accuracy and long-term stability. The GE-1920 measures the refrigerant temperature at both the high- and low-pressure sides of the line. The control module uses this information to maximize the performance of HVAC systems. Amphenol Advanced Sensors GE-1920 HVAC Refrigerant Temperature Sensor offers a fast response time, plated steel body, and +100°C maximum operating temperature.