Appion Inc.

P300 Wireless Pressure Gauge
High-Resolution 0-300 psi Pressure Gauge

Digital Vacuum and Pressure/Temperature gauges also available



P300 Wireless Pressure 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" Gauge: No Hoses, No Manifold

NIST-Traceable accuracy with 5-point certification

Features and Benefits

  • Rubberized water resistant housing (IP65 Rated)
  • Large, easy to read backlit LCD
  • Direct connections minimize charge loss and leaks
  • Optional auto power off (15 minutes with no change)
  • Free ION HVAC/R App™ enables remote viewing on your smartphone or tablet
Wireless Digital Stub Gauges

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.

Active gauge readings enable 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 with Multiple Gauges


Useful Information

Additional Materials

Technical Bulletins


Safety Reminder

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


Product Specifications

Range 0 to 300 psi
Usage High Resolution Measurements
Accuracy +/-0.5% (ASME B40.7 Grade 2A)*
Resolution 0.2 psi
Units psi, kg/cm2, bar, kPa, MPa
Max Overpressure 450 psi
Fitting 1/8" Male NPT
Included Adapters 1/8" F NPT to 1/4" M Flare
1/8" F NPT to 1/4" F Flare
* NIST Traceable

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


Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. -- Google Play is a trademark of Google Inc. The Bluetooth ® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Appion Inc. is under license. Other trademarks and trade names are those of their respective owners.