The ESM012R-M24 is a remote sensor module manufactured by Teledyne. It is a battery-operated, low-power device designed for temperature, relative humidity, CO2, and pressure measurements. This device supports a variety of communication protocols including Modbus, EtherCAT, and PROFINET, and is certified for CE, FCC, and RoHS. The unit contains two small internal batteries capable of powering the device for up to 5 years. Additionally, the device is IP65 rated for added protection.