The standard technology for ammonia gas detection and alarm in cold storage mainly includes the following aspects:
Detection principle: Ammonia gas detection alarms generally use chemical sensing technology or electrochemical sensors, which can quickly respond to changes in ammonia concentration. The response time of these sensors should be within the specified range to ensure timely and accurate detection.
Alarm setting: The alarm setting of ammonia detectors is usually based on the harm of ammonia to human health. According to relevant national and industry standards, the safe concentration range of ammonia is generally set as follows: the low alarm value is usually 25ppm, and the high alarm value is 50ppm (some standards may vary). If the detected concentration exceeds these set values, the detector should immediately sound and light an alarm.
Environmental adaptability: Cold storage environments usually have low temperatures, so ammonia detectors must have strong low-temperature adaptability. At the same time, the detector should have good anti-interference ability to avoid misjudgment of ammonia concentration by other gases in the environment.
Battery and power supply: Most ammonia gas detection alarms use built-in batteries and support long-term continuous operation. The standard specifies the service life, charging cycle, and battery replacement cycle of the battery.
Sensitivity and accuracy: Ammonia detectors must have high sensitivity and accuracy, be able to detect low concentrations of ammonia, and accurately provide feedback on gas concentration. This is crucial for preventing gas leaks from causing safety accidents.
Installation and maintenance: According to standard requirements, gas detection alarms should be installed in places where gas leaks may occur in cold storage, usually on the ground or at a certain height above the ground, to ensure effective detection to the maximum extent possible. Regular inspection and calibration are necessary to ensure the accuracy and reliability of the equipment.
Certification and standards: Different countries and regions may have different standards for gas detection alarms. For example, China's "Fixed Gas Detector" and "Portable Gas Detector" standards, as well as relevant standards from the International Organization for Standardization (ISO), all have specific requirements for the performance, detection methods, and safety of detectors.
These standard technical requirements help ensure the reliability and effectiveness of ammonia gas detection alarms in cold storage, thereby ensuring the safety of cold storage operators.