What Are Gas Detectors?
Gas detectors are safety devices that alert the user when dangerous amounts of flammable or toxic gases are prevalent or if oxygen levels drop below an acceptable level. This allows for the activation of countermeasures to minimise a hazardous situation for employees, assets and the environment.
When Should Gas Detectors Be Used?
Gas detectors must be used in any application where persons may come into contact with flammable or toxic gases and vapours, or if there is a risk of oxygen deficiency. You should never rely entirely on your sense of smell. At lethal doses, many gases and vapours are unable to be detected by scent.
Types of Gas Detectors
Portable gas detectors are worn on the person, allowing an individual to work in a hazardous area such as a confined space. Because portable gas detectors are worn on the person, they travel and experience the same environmental conditions.
Fixed gas detectors are placed in a particular working location, measuring the gas concentrations within that area. A fixed gas detector monitors that area constantly, sounding an alarm when a leak is detected – even if there are no operators present.
Multi-Gas detectors are used to simultaneously detect multiple gases such as Hydrogen Sulphide, Carbon Monoxide and Oxygen as well as flammable gases and oxygen depletion.
Single Gas Detectors
Single gas detectors are often smaller and lighter than multi-gas detectors. As the name suggests, single gas detectors notify the user when a particular harmful gas is present.
Bump Test vs Calibration Test for Gas Detectors
A bump test exposes the detector to target gases to validate that its sensors are responsive and will sound the alarm. This confirms that the detector is sensitive to target gases, and the alarming system is functional.
Calibration adjusts the detector’s sensors to a standard concentration of target gas. Adjustments involve the modification of the detector’s response to meet with what is to be expected while exposed to the source. This ensures the gas detector’s accuracy when measuring target gases.
It is recommended that a bump test is always performed prior to use, and before calibration. Many gas detector failures can only be identified by a bump test, therefore a calibration alone does not guarantee that the detector is properly functioning.
Need more help finding your gas detection perfect match? Contact ATOM Safety!