A redesigned HMP45C-L sensor started shipping in May 2004. We have removed a circuit in the cable of the HMP45C-L to ease installation and reduce the risk of damage to the sensor. The newer versions of the HMP45C-L have a yellow label on the cable instead of a white label and six wires instead of seven. The HMP45C-L is typically powered via a 12 V terminal on a datalogger. To conserve power, a switched 12 V terminal or a SW12V can be used.