HOLYKELL was established in 2001. We have been focusing on the R&D and sales of various measuring instruments such as submersible level sensors, ultrasonic level sensors, smart wireless solutions, electronic pressure switches, air differential pressure sensors for many years. More than 80% of HOLYKELL employees have bachelor's degree. At present, HOLYKELL has more than 120,000 customers worldwide and it's products are exported to 175 countries in Europe, America, Australia, Africa, SouthEast and Asia. In the latest petrochemical industry, our newest products have the advantages of small size, temperature changes resistance, high stability and reliability. HOLYKELL has a number of national patents. The purification workshop covers 5000 square meters with one automatic production line and two semi-automatic production lines and 1000 ㎡ modern office. The annual production capacity is one million sensors. Our products have passed the CE, ATEX, TUV CE and FCC certification of the European Union and North American, The factory have been passed ISO9001:2015 international quality management system certification. Our mature and advanced production processes and technologies can guarantee the safe, stable and long-life time operation on your project.