Pressure Temperature Compound Gauge PTC900

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5.32 oz. (151 g) *without batteries
Gauge Body Dimensions:
0.43 x 1.91 in. (265 x 48.25 x 25.4 mm)
Flexible Probe Dimensions:
Length: 4.3 in (110 mm) Diameter: 0.38 in. (9.75mm)
Pressure Probe Connection:
1/4 in. Female Flare
Water Resistance:

PTC900 Digital Pressure Temperature Compound Gauge: Precision Monitoring Made Easy

Introducing the PTC900 Digital Pressure and Temperature Gauge – your essential tool for accurate measurements and remote monitoring in AC/R system service. With its advanced features and intuitive controls, the PTC900 simplifies complex HVACR diagnostics and ensure you get the job done efficiently and effectively.

Features and Benefits

  • Precision Measurements Without Refrigerant Loss - With the PTC900, you can directly measure pressure and temperature from system access ports, eliminating the need for manifolds and long hoses that cause refrigerant loss.
  • Enhanced Temperature Accuracy - Featuring a temperature clamp with minimal thermal mass and a thermally isolated contact sensor, the PTC900 offers improved response times and highly accurate temperature readings. These precise measurements, combined with the onboard refrigerant library, enable you to calculate saturated temperature, superheat, and subcool values effortlessly.
  • User-Friendly Interface and Controls - The main screen provides essential information at a glance, including battery level, pressure, probe temperature, selected refrigerant, and more. With dedicated buttons for power, backlight, cycle, and units, you have full control at your fingertips.
  • Bluetooth Connectivity and Remote Monitoring - Pair the PTC900 with the Appion Central™ App for seamless Bluetooth connectivity. This integration enables remote real-time viewing of gauge readings, making it ideal for analyzing evolving, complex, high-efficiency systems. Multiple simultaneous remote readings are possible.
  • Robust and Reliable Design - Its durable construction, including a rubberized water-resistant IP55 housing, ensures protection against the hazards of the jobsite.


  • (1) PTC900 Gauge
  • (1) Temperature Clamp
  • (2) AA Batteries
  • (1) Quick Start Guide
  • (1) Durable Hard Case

Gauge Specifications

  • Gauge Weight: 5.32 oz. (151 g) *without batteries
  • Gauge Body Dimensions: 0.43 x 1.9 x 1 in. (265 x 48.25 x 25.4 mm)
  • Flexible Probe Dimensions:
    • Length: 4.3 in. (110 mm)
    • Diameter: 0.38 in. (9.75 mm)
  • Pressure Probe Connection: 1/4 in. Female Flare
  • Water Resistance: IP55 *with temperature probe or clamp connected
  • Units: Pressure: psi and in/Hg, kg/cm² and cm/Hg, bar, kPa, MPa Temperature: Fahrenheit (°F), Celsius (°C)
  • Gauge Operating Temperature: -4 °F to 131 °F (-20 °C to 55 °C) *limited by battery performance
  • Storage Temperature: -4 °F to 140 °F (-20 °C to 60 °C) *without batteries
  • Battery Type: 2 x AA
  • Battery Life:
    • Bluetooth On: 175 hours at 77 °F (25 °C)
    • Bluetooth Off: 220 hours at 77 °F (25 °C)
  • Wireless Range: 1000 ft. (300 m) *line of sight
  • Auto Power Off Time: 15 Minutes (Selectable On/Off)
  • Sensor Operating Range: Pressure: -28 in/Hg to 900 psi
  • Resolution: Pressure:
    • .5 psi, .4 in/Hg, .03 kg/cm², .1 cm/Hg, .034 bar, 3 kPa, .003 MPa
    • Temperature: 0.1 °F, 0.1 °C
  • Pressure Accuracy: Pressure: ≤ .06% of Full Scale
  • Display Overload: 900.1 psi
  • Sensor Overload: 1450.4 psi

Temperature Clamp Specifications

  • Weight: 2.32 oz. (66 g)
  • Temperature Probe Dimensions:
    • Clamp Size: 4.17 x .98 x 1.81 in. (106 x 25 x 46 mm)
    • Probe Size: .86 x .78 x .39 in. (22 x 20 x 10 mm)
    • Pipe Size Compatibility: 1/8 in. to 1 ⅝ in. (3.175 to 41.275 mm)
    • Cable Length: 6 ft. (1.82 m)
  • Water Resistance: IP67 *clamp only
  • Probe Operating Temperature: -4 °F to 131 °F (-20 °C to 55 °C)
  • Storage Temperature: -4 °F to 140 °F (-20 °C to 60 °C)
  • Sensor Saturation Time: 8 Seconds *varying conditions may delay saturation time
  • Sensor Operating Range: -40 °F to 221 °F (-40 °C to 105 °C)
  • Temperature Accuracy:
    • ±.45 °F at 77 °F / ±.25 °C at 25 °C
    • ±1.8 °F (-40 °F to 221 °F) / ±1 °C (-40 °C to 105 °C)

Gauge Features with the Appion Central App™

The Appion Central App™ enables remote, real-time viewing for all Appion Digital Gauges.

Multiple, simultaneous remote readings are now possible. Easy-to-use and perfect for advanced system analysis on evolving, complex, high-efficiency systems.

When the PTC900 is paired with the Appion Central App™, receive remote notifications from custom alarms when readings move beyond predetermined thresholds.

Active gauge readings enable real-time system evacuation leak test analysis, multiple alarms, and more. More functionality, less bulk.


Useful Information

Additional Product Materials

Always wear gloves and eye protection and follow proper safety practices when handling refrigerant. See these Tech Bulletins for more information.

For California Consumers:




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