TP-HHT-5 is a handheld terminal specially designed by Tespro China for on-site measurement data collection. The handheld terminal adopts a high-strength outdoor protection shell design, with an IP68 waterproof rating, and can adapt to any harsh outdoor environment. At the same time, using the standard Android operating system can provide a very user-friendly operating experience, while also providing a standardized software development environment. HHT can be used in conjunction with TP-USB and TP-BT series optical probe for meter data reading. If needed, standard meter reading software such as IEC and ANSI can be configured to provide customers with one-stop