Mastercool 52228 Dual-Probe Differential Thermometer

The Mastercool 52228 is a digital differential thermometer designed for HVAC and refrigeration technicians who need to measure temperature at two points simultaneously and read the differential in real time. Insert the two Type K thermocouple probes into separate points in the system — supply and return air, suction and liquid lines, inlet and outlet — and the 52228 instantly displays T1, T2 and the T1–T2 differential on its large digital screen.

With a wide measurement range of -50 to 1300°C, Max Hold, Data Hold and AUX output jacks, this is a practical tool for commissioning, fault finding and system performance checks. Browse the full thermometer range or see more Mastercool tools at HVAC Shop AU.

Key Features

• Simultaneous T1, T2 and T1–T2 differential display
• Type K thermocouple input — wide compatibility with standard HVAC probes
• Temperature range: -50 to 1999°F / -50 to 1300°C
• Resolution: 1°F / 1°C
• Max Hold and Data Hold functions
• AUX output jacks for data logging
• Celsius / Fahrenheit selectable
• Includes two 3 ft (approx. 900mm) Type K thermocouple probes
• Battery operated with protective carrying case

Specifications

What’s Included

• Mastercool 52228 differential thermometer
• 2 × Type K thermocouple probes (3 ft / approx. 900mm each)
• Protective carrying case
• Battery

For single-probe thermometers and IR options, browse the full HVAC thermometer collection. For more Mastercool instruments, see the Mastercool tools range.