Digital Pressure Temperature Sensor (DPTS)

 

The Digital Pressure Temperature Sensor (DPTS) is a device that measures pressure and up to two temperatures. The device is suitable for gases such as N2, CO2, Ultra dry air; for hydraulic oils; and for all ASHRAE safety group A1, A2 and A2L refrigerants such as R134A, R22, R404A, R410A and etc. For best-in-class reliability, this integrated design does not use any O-ring for seals. 

 

The end-user may utilize pressure and/or temperature readings as input to send a desired fixed or variable PWM output to electrical equipment, such as actuators, LED lights, and compressor contactors via solid-state relay. The DPTS can also be used as a real-time superheat sensor when installed at the evaporator outlet of an HVAC or Refrigeration system.

 

Special Features include: 

  • Pressure and temperature (s) sensor
  • Palm size compact design with plug and play capability
  • Programmable PWM output
  • Real-time superheat calculation
  • UL listed for all ASHRAE safety group A1 refrigerants
  • UL recognized for all ASHRAE safety group A2 and A2L refrigerants
  • Embedded software with bootloading capability
  • Extensive fault detection embedded software:
    Low/High pressure, Low/High temperature, Low/High superheat etc.
  • MODBUS RTU protocol with RS485 Communication BUS
  • Windows-based Graphical User Interface

 

The DPTS hardware is comprised of an integrated MEMS pressure sensor and an intelligent micro-processing unit. The wiring harness (sold separately) for DPTS includes an external temperature sensor, RS485 communication wires, power input wires, PWM output wires, and two general-purpose wires for an option to add a second temperature sensor. The end-user communicates with the DPTS using the MODBUS RTU interface controller or by using DMQ’s Windows OS-based graphical user interface.

 

In the News: