DunAn Microstaq, a cloud-based HVACR solutions company, has released a compressor safety solution using Digital Pressure Temperature Sensor for residential and commercial HVACR Systems.

The Digital Pressure Temperature Sensor (DPTS) can measure one pressure input and two temperature inputs. The DPTS is compatible for all ASHRAE safety group A1, A2 and A2L refrigerants.

Frequently, compressor failure in HVAC and refrigeration systems occurs due to liquid refrigerant floodback when evaporator coils are blocked, there is a poorly defined expansion valve superheat setting, or excessive refrigerant charge levels.

Floodback is defined as liquid refrigerant returning to the compressor while the HVACR system is operating.

The best way to protect a compressor from liquid refrigerant floodback is by monitoring the compressor suction superheat parameter in real-time, this is where DPTS product comes in.

DMQ’s DPTS product offers the most efficient compressor protection solution with autonomous, real-time, superheat measurement and set-points for floodback superheat cut off. The DPTS can be installed as a standalone intelligent digital sensor-switch without the need for complicated logic implementation.

The DPTS database comes preloaded with 50 types of refrigerants and can be easily installed at the compressor suction line with a ¼” access fitting. When floodback superheat is detected, DPTS sends an OFF signal to the compressor contactor via relay.

The DPTS utilises MODBUS RTU communication protocol. It can be integrated to DMQ’s intelligent HVACR cloud solution.

It tracks the performance of the HVACR system in the field and can be easily monitored via a mobile platform.

Moreover, the system will transmit notification when abnormal performance or trends are observed.

It can also be utilised for targeted preventive maintenance that can lead to better overall system performance and cost savings.


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