This series of instruments is one of the earliest professional paperless recorders in China. It has the characteristics of small daily maintenance workload, low operating costs, good reliability, flexible application, ultra stable on-site use, and a long history of industry application. Mainly used in various industries such as petroleum and petrochemicals, chemical engineering, papermaking and plastics, textile printing and dyeing, metallurgy and building materials, science and education and national defense, biomedicine, municipal environmental protection, energy metering, food and oil, tobacco and alcohol beverages, equipment manufacturing, equipment sets, and agriculture, forestry, animal husbandry, and fishery.