Company Introduction

Founded in 2001, Holykell is a High-Tech Enterprise integrating R&D, production and sales. The company have gathered a number of excellent domestic technical experts in various fields such as automation, electronics, machinery and computer. 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 ATEX, TUV CE, RoHS 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.
  • What sizes are sensors available in?

    Answer: We have sensors in many shapes and sizes. Please refer to our catalogs to see diagrams of our standard sensors. Contact Holykell for the sensor that would best fit your application. Custom sensors are also available.

  • What is the temperature range for sensor use?

    Answer: Standard Holykell sensors are specified to operate in a temperature range from -40 ºC to 60 ºC. If the sensor is used at a temperature different than the calibration temperature, there will be a temperature effect.

    We do also have High Temperature model sensors; they are specified to operate in a temperature range from -40 ºC to 200 ºC. Calibration would be affected when the temperature goes beyond this specified range.

  • What is the resistance range of a Holykell sensor?

    Answer: The resistance range of the sensor is typically from  > 5MΩ at no load to approximately 5kΩ at full load. This can vary depending on the electronics being used to drive and read the sensor.


  • What is calibration?

    Answer: Calibration is the method by which the digital output of the system is converted to an actual engineering unit. Calibration enables you to compare the output of the same sensor in various environments and allows you to compare calibrated outputs of various sensors.