Eberle Temperature Transmitters Indoor thermostat 624127 - Eberle 111 1102 51 100, Eberle manufactures the RTR-E 6124, an indoor thermostat designed for surface-mount installation. This device operates in 24-hour mode and is ideal for controlling room temperature in heating applications. It is commonly used for efficient temperature management in residential and commercial settings. Eberle 111 1102 51 100 RTR-E 6124 Indoor Thermostat Surface-Mount 24h Mode