The symbol "U" in the explosion-proof certificate is used to represent the symbol of Ex components; The symbol "X" in the explosion-proof certificate represents a symbol for specia……

Explosion proof certification is actually a necessary test that most electrical products must pass and obtain certification certificates for. This is not only a guarantee of product quality promotion,……

Testing items and handling institutions for C4 anti-corrosion level certification

In 1998, the International Organization for Standardization (ISO) introduced ISO12944 (Corrosion Protection of Steel Structure Protective Coating Systems), which is an international common standard. I……

The calibration cycle for combustible gas detection alarms is usually once a year. According to the national standard JJG 693-2011 "Combustible Gas Detection Alarm", the calibration cycle of……

The main technical requirements include the following: 1. Power on self-test and alarm function: The instrument should have automatic self-test function when turned on, and the alarm component should ……

The new version is GB 12358-2024, which will be officially implemented on June 1, 2025. The standard is applicable to the production and use of combustible gas, toxic and harmful gas, and oxygen detec……

Shenzhen Zhongnuo Detection Technology Co., Ltd. specializes in the detection, calibration, measurement and other services of gas alarms, combustible gas detectors, toxic and harmful gas detectors and……

Shenzhen Zhongnuo Detection Technology Co., Ltd. focuses on regular calibration and measurement services for combustible gas detectors and combustible gas detectors, providing protection for the produ……

Shenzhen Zhongnuo Detection Technology Co., Ltd. specializes in the detection, calibration, measurement and other services of gas alarms, combustible gas detectors, toxic and harmful gas detectors and……