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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 YJACK VIEW™ App and P51-870 TITAN® devices.

Learn more about the new YJACK™ Series.

New features and innovative tools may be added to our firmware. To check to see if you have the most up-to-date firmware update, click on the button below.