iWSN-3020-TC-BT-IP65 is a wireless temperature sensing module in the iWSN series. It provides IP65 grade of dust-proof and water-proof, 433 MHz wireless communication interface, and supports 2-channel K-Type thermocouple temperature measurement. It will actively periodically response the measured temperature to the iWSN wireless data concentrator. This module has a built-in disposable lithium battery for power supply, additional power supply is not required. It is suitable for environments with extremely thick dust, no power supply, and difficult wiring restrictions. That is contribute to real wireless deployment. Furthermore, this module can set 16 wireless channels and 4 Group ID, which is helpful for distinguishing and controlling 433 MHz wireless networks. Users only need to uses the DIP switch for configuration to complete the settings, that let the module to be adjusted and maintained even simpler.