Ball type control port for  increased accuracy  • New lever with reinforced  edges for increased linearity  • New bimetal element to  compensate for ambient  temperature effect  • Integral hypodermic needle  test point  The T-5210 Pneumatic  Temperature Transmitter is  designed to measure a  temperature and convert this  measurement to an air pressure  signal that is transmitted to a  pneumatic receiver, controller, or  receiver-indicator. When used  with a Dewcel (purchased  locally), the T-5210 can also be  used as a dew point transmitter.  Pneumatic feedback is  incorporated into the transmitter  design to provide an exact  proportional relationship  between the measured  temperature and the transmitted  signal.  Various models are furnished  with appropriate brackets for  mounting to ductwork, walls, or  directly to the hub of a duct  flange or separable well.