A humidity and temperature measurement solution for the ATEN PG PDU series The EA1640 is a compact, flexible humidity and temperature measurement solution for ATEN PG PDU series applications where precision is critical - from server rooms, data centers, hospitals, smart factories to green offices. The sensor has 1 x RJ-45 input port, 1 x RJ-45 output port and 1 x RJ-11 input port for easy connection to the PG PDU series and environmental sensors such as EA1140, EA1240 and EA1340. A connection block is provided for the combination of EA1440 / EA1441 / EA1442 door sensor or EA1540 the capacitive leakage sensor. Up to 8 devices are supported in daisy chain to extend the application possibilities.