Appion Inc.

ION PT Gauges
High-Accuracy Pressure/Temperature Gauges

Digital Vacuum Gauge and High-Resolution Pressure Gauge also available



ION Wireless P/T Gauges

ION HVAC/R App Requirements

Android Version 4.3 or greater Bluetooth® 4.0
iOS Version 8.0 or greater Bluetooth® 4.0

iPhone app on iTunes   Android app on Google Play

Digital "Stub" Gauges: No Hoses, No Manifold

NIST-Traceable accuracy with 5-point certification

Remote gauge readings

Remote, Real-Time Readings

PT Gauges data logging

Live Data Logging and Reporting

IP65 Rated Gauge

Built to Withstand Real-World Conditions


Features and Benefits

  • View Multiple, Simultaneous Measurements:
    "Low Side", "High Side", and Temperature
  • Digital "Stub" Gauges:
    Minimize charge loss; perfect for "critical charge" applications
  • Minimized Mass Clamps:
    Compact stainless steel clamp for durability and easy placement
  • Thermally-Isolated Contact Sensor:
    Reduced thermal mass for greater accuracy
  • Advanced System Analysis:
    Superheat/Subcool Calculations, Reporting, and more with the ION HVAC/R App™
Temperature Sensors

Wireless Gauge Features with the ION HVAC/R App™

The ION HVAC/R App™ enables remote, real-time viewing for appION™ Wireless Digital Gauges.

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

Access an extensive refrigerant P/T lookup and receive remote notifications from custom alarms when readings move beyond predetermined thresholds.

Active gauge readings enable superheat/subcool, real-time system analysis, custom layout configuration, multiple alarms, and more. More functionality, less bulk.

Get the app for the iPhone, iPad, and iPod Touch on the App Store™.
Get the Android app from Google Play™.

ION App Superheat and Subcool

The OLD Problem

The old problem

The NEW Appion Solution


* Full Scale (Pressure)

High Accuracy Temperature & Pressure Measurement

Stub Gauge Connections = Low Loss


Durable & IP65 Rated

Sensor Mounts To Any Size Pipe



Additional Materials

Technical Bulletins


Safety Reminder

Always wear gloves and eye protection and follow proper safety practices when handling refrigerant.


Gauge Specifications

PT500 PT800
Range Compound 29in to 500 psi 0 to 800 psi
Usage "Low Side" Measurements "High Side" Measurements
Accuracy +/-0.5% (ASME B40.7 Grade 2A)* +/-0.5% (ASME B40.7 Grade 2A)*
Resolution 0.5 psi 0.5 psi
Units psi, inHg, kg/cm2, cm/hg, bar, kPa, MPa psi, kg/cm2, bar, kPa, MPa
Max (Proof) Overpressure 750 psi 1000 psi
Fitting 1/8" Male NPT 1/8" Male NPT
Included Adapters 1/8" F NPT to 1/4" M Flare
1/8" F NPT to 1/4" F Flare
1/8" F NPT to 1/4" M Flare
1/8" F NPT to 1/4" F Flare
* NIST Traceable

Temperature Sensors

Sensor Type NTC Thermistor
Range -40 - 225°F
Accuracy +/- 0.27°F
(32 - 122°F)
Resolution 0.1°F
Cable Length 79 in.
Clamp Opening 0.25 - 1.5 in. OD*
Sensor Type NTC Thermistor
Range -40 - 105°C
Accuracy +/- 0.15°C
(0 - 50°C)
Resolution 0.1°C
Cable Length 2m
Clamp Opening 6.35 - 38.1mm OD*
* Sensor mounts with Clamp or Zip Ties for any size pipe

Dimensions and Power

Dimensions 4.4in. x 2.75in. x 1.2in.
Weight 6.8oz
Power (3) AA Batteries
Battery Life 160 Hours*
Operating Temp 0° - 140°F
Dimensions 113mm x 70mm x 30mm
Weight 193 grams
Power (3) AA Batteries
Battery Life 160 Hours*
Operating Temp -17.8° - 60°C
* Continuous usage with radio turned off


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