• Wireless measurement of psychrometric parameters with ease
• Measures percent relative humidity, dry bulb temperature, wet bulb temperature, and dew point temperature
• Measure enthalpy change across evaporator coil for system operational efficiency
• Features 8" flexible steel wand for optimal sensor positioning within ventilation ducting
• Optimized sensor housing designed for increased air exchange and better response time

The YELLOW JACKET YJACK Series provides a total HVAC/R diagnostic solution. Use the YJACK DEW Psychrometer to easily and wirelessly measure temperature, humidity, wet bulb, dew point and more in ambient air or ventilation ducting using a Bluetooth signal. The optimized sensor housing is designed for increased air exchange and better response time and with 1500 hours of extended battery life. The YJACK DEW psychrometer is compatible with the YJACK VIEW App and P51-870 TITAN devices.

YJACK for more Connected Techs

The YJACK Series is a network of devices that form a new platform offering a total HVAC/R diagnostics solution. Multiple devices can measure system and environmental parameters, providing a complete picture of a system’s condition. Each device utilizes Low Energy Bluetooth (BLE) technology to interconnect with each other and any smart device, Android or iOS. Many of the YJACK Series devices can also communicate directly with the P51-870 TITAN Digital Manifold simultaneously.

The YELLOW JACKET YJACK VIEW App provides seamless integration with YJACK and P51-870 TITAN devices offering a complete HVAC/R system diagnostic solution. Just use your YJACK and P51-870 TITAN devices with your smartphone for complete system analysis.

Easily receive and analyze live data from all powered on nearby YJACK and P51-870 TITAN devices including system pressure, temperature, vacuum, psychometrics, and current draw. Includes a variety of session types useful for diagnosing any HVAC/R system.

• Measure HVAC/R system pressure, temperature, saturation temperature, superheat, and subcooling
• Monitor system evacuation status
• Check indoor air comfort and system efficiency with psychrometric air calculations: percent relative humidity, dry bulb, wet bulb, and dew point temperature measurements
• Perform system leak tests and track pressure charge over time
• Measure system charge with scale weight readings during charging and recovery operations
• Take electrical current measurements and analyze critical system power information
• Generate highly customized and detailed service reports capturing system readings and equipment information
• Monitor status of all nearby YJACK and P51-870 TITAN devices
• Freely switch between multiple simultaneous sessions without loss of data
• Customize data view for each measurement
• Create data logs to be saved or emailed from your smart device
• Choose from 126 refrigerant profiles found in the REFPROP database
• Available on iOS (version 10 or later) and Android (version 8 or later) smart devices

• Effortlessly create and manage a network of connected HVAC/R system diagnostic devices
• Compatible with all YJACK and P51-870 TITAN devices (firm-ware version v2.0 and later)
• No device connections necessary - seamlessly move in and out of range of devices without reconnecting or relaunching the application
• Freely navigate between available session types, multiple sessions at one time
• New session types including Psychrometric System Efficiency and Leak Test as well as communication capabilities with YJACK PRESS, YJACK VAC, YJACK AMP in v3.0 or later
• Easily place and monitor the status of all YJACK and P51-870 TITAN devices from one screen
• Adjustable datalog formatting and multiple sampling intervals