Chock temperature control is an important issue in cold rolling mills. Traditional wired systems don't offer satisfactory results for practical use. Because of very low power consumption using Zigbee (IEEE 802.15.4) wireless technology, temperature sensors (up to 125 οC ) suitable for a tandem cold mill environment have been developed. The complete monitoring system includes repeaters, a base receiver with transmission control protocol/Internet protocol (TCP/IP) gateway, and a maintenance software. The results obtained in the tandem mill are collected.