Nowadays, PLN has to hire employees to record the data which is shown by KWH meter at customer's house. The employee can not record it if there are no people in customer's house. To solve this problem, it is needed a KWH meter which can transmit data by using wireless data logger system, so that, the PLN's employee can record the data although there are no people in customer's house.
This paper describes about implementation of wireless data logger system on KWH meter. Method used in this system is counting the rotation number of KWH meter plate, then microcontroller transfers the data to the remote device. The sensor used for counting the rotation number is infrared sensor as the transmitter and photodiode as the receiver. Experimental results show that the device can run well if the angle between remote and panel less than 40°, and the distance between remote and panel less than six meters. The maximum power consumtion of the device is not more than 5 watt.