Here's how to choose a suitable toxic and harmful gas detector:
Detection Accuracy and Range
Accuracy requirements: Select according to the actual accuracy requirements of the application scenario. For places with high - safety requirements, such as chemical production workshops and gas transmission pipelines, high - accuracy detectors are needed to ensure the timely and accurate detection of extremely low - concentration gas leaks. Generally, the higher the accuracy, the higher the price of the detector. Therefore, the cost factor should be considered comprehensively while meeting the safety requirements.
Measurement range: Choose a detector based on the possible concentration range of toxic and harmful gases. The measurement range of the detector should cover the expected minimum and maximum concentration values and maintain good accuracy and stability throughout the measurement range. If the measurement range is too narrow, it may not be able to detect high - concentration gas leaks, leading to safety accidents. If the measurement range is too wide, the accuracy may be insufficient when detecting low concentrations.
Response Time and Recovery Time
Response time: It refers to the time it takes for the detector to detect the gas and give an accurate reading after the gas concentration in the environment changes. A shorter response time is better, especially in emergency situations, which allows for timely detection of gas leaks and taking corresponding measures.
Recovery time: After the gas concentration returns to normal, the time it takes for the detector to return to its initial state. A shorter recovery time enables the detector to be ready for the next detection quickly.
Select According to the Working Environment
Explosion - proof requirements: If the detector is used in a flammable and explosive environment, it must have explosion - proof performance and meet relevant explosion - proof standards, such as being marked with explosion - proof grades such as Ex d IIC T6.
Environmental conditions: Consider factors such as temperature, humidity, and dust in the working environment. Some detectors are suitable for use in high - temperature or high - humidity environments, while others may have limitations. If the environment is dusty, choose a detector with good dust - proof performance to avoid affecting the detection accuracy.
Brand and After - sales Service
Brand reputation: Choose products from well - known brands with a good reputation. Such brands usually have strict quality control and technical R & D capabilities, and the quality and performance of their products are more reliable.
After - sales service: Good after - sales service is essential. The manufacturer should be able to provide timely technical support, maintenance, and calibration services to ensure the normal operation of the detector. Inquire about the warranty period, repair cycle, and customer service quality of the product before purchasing.
