E.R.L.D is a fixed electronic device that is designed to be installed inside the cold room or walk in freezers or cabinet or whatever a refrigeration system is cooling. E.R.L.D has the ability to operate 24/7 and to detect leaks in the air flow for all types of refrigerants (R-22, R-12,R-134a,R-404a,R-410,R-407c,R-422,R-452,R-507etc.)A1 types refrigerants ,it can inform minutes,hours even days before the temperature starts rising (it depends how big the leak is). E.R.L.D can be easily embedded to operate with temperature - humidity data loggers, telemetry system, telemonitoring, electronic thermostat controllers, PCB' s or other real time IoT refrigeration monitoring systems, giving an option for your clients so they can make informed decisions and react to problems before they happen . It can be used in a lot of refrigeration sections like cold chain, industrial, commercial and transportation .