This paper presents the design and implementation of a smart transducer system for electrical cabinet equipment theft. The system consists of a sound sensor module, an ultrasonic distance sensor element and an ATMega328p micro-controller. The solution was designed to operate in a zone 2 hazard area. The raw sound sensor output signal was preprocessed using appropriate signal transformations. The prototype was tested on HUAWEI's 5G Telecommunications cabinet, connected to an SMU on the rectifier via USB for main power. Alarms are displayed on HUAWEI'S NetEco site energy monitoring software noise threshold and/or door movement detected. This solution can easily integrate to any IoT system with minimal or no modifications. A low cost, low power consumption, real-time, high accuracy solution was realised. The prototype implemented achieves an average response time of 4 over 6 samples.