Abstract: A spring clamp marker assembly is composed of interconnecting spring clamp hose markers that provide a positive and easily changeable means for marking hoses used to maintain HVAC equipment and for any other suitable application. The interconnecting spring clamp hose markers may also be used with power cables or other linear items with a generally circular cross section.

Abstract: A refrigerant recovery system includes a direct current (DC) motor and digital display and controls enabling an automatic self-test mode to insure proper operation prior to starting to service an HVAC system and a maintenance assist mode to diagnose and suggest maintenance for optimum performance of the refrigerant recovery system.

Abstract: HVAC-R sensor probes include a “visual indicator switch” that is built on to the tool itself. The switch can be toggled between 2 selections indicated by the colors red and blue. If the switch is on red, the color signifies high side pressure for a pressure gauge, high side temperature for a pipe clamp thermocouple, and return side for a psychrometer. If the switch is on blue, the color signifies low side pressure for a pressure gauge, low side temperature for a pipe clamp thermocouple, and supply side for a psychrometer. Once the switch has been set to the appropriate side, the probe will relay this information via wireless transmission to the smart device. The smart device reads this data in real time and will instantly set the tools to the selected side in the app, changing sides if the tool switch is once again toggled. This switch allows a direct correlation in the real world as well as in the virtual world.

Abstract: A refrigerant recovery system includes a direct current (DC) motor and digital display and controls enabling an automatic self-test mode to insure proper operation prior to starting to service an HVAC system and a maintenance assist mode to diagnose and suggest maintenance for optimum performance of the refrigerant recovery system.

Abstract: This invention is a measuring instrument assembly having a probe for placement through an opening in an airway such as a duct for measuring physical parameters of an airstream flowing through the airway. The probe includes a hook arranged to engage an inner wall portion of the airway adjacent the opening to retain an end of the probe in a selected position inside the airway.