One of the most common myths about nodules is the diagnosis itself! Usually doctorâs donât have the necessary equipment (stroboscopy) to diagnose vocal problems. So all problems are called nodules. Every singer has a colleague who had ânodulesâ for this reason.
An RTU is a type of AHU. AHU stands for Air Handling Unit and the acronym RTU means Rooftop Unit. The Roof Top Unit is an outdoor AHU. As RTUs are mounted on the roof, there is no concern about creating extra space indoors for it as would be the case for the other types of AHU.
An RTD example is Honewellâs TD Series used for such applications as HVAC â room, duct and refrigerant temperature, motors for overload protection, and automotive â air or oil temperature. Within the TD Series, the TD4A liquid temperature sensor is a two- terminal threaded anodized aluminum housing. The environmentally sealed liquid temperature sensors are designed for simplicity of installation, such as in the side of a truck, but are not designed for total immersion. Typical response time (for one time constant) is four minutes in still air and 15 seconds in still water.