The RTR500B series allows you to mix and match an array of wireless radio communication loggers with various Base Units or Data Collectors to meet your needs. Logged data can be automatically sent via network or mobile communication to be saved in cloud storage or to a specified location. The RTR501B with its compact rugged design and internal temperature sensor can be used in environments of -40℃ to +80℃ and has an IP67 waterproof rating (immersion proof). The slower response to temperature changes makes it perfect for temperature monitoring of products stored in the refrigerator.