When monitoring the atmosphere in a confined space there are several important issues that need to be considered, reviewed, and managed. One of the major issues centres on air quality and what you are breathing, both prior to entry and during the occupation of a confined space.
You need to know what the oxygen content of the atmosphere is and whether there are explosive or toxic gases that could threaten the safety of the environment or, perhaps more importantly, your life. When properly used and maintained, gas detection monitors will protect both.
Not only do you need to monitor the atmosphere of your confined space to protect your life, but also OSHA requires you to do so. OSHA standard 29 CFR 1910.146 (c) subsection (C) states: Before an employee enters the space, the internal atmosphere shall be tested with a calibrated gas detector, for the following conditions in the order given: (1) oxygen content, (2) flammable gases and vapors, and (3) potential toxic air contaminants.
When choosing a monitor to test and continuously monitor a confined space, you should take into consideration several attributes of the monitor and be sure to accessorize accordingly.
First and foremost, you will need a multi-gas monitor that is capable of monitoring for all of the OSHA-required hazards: oxygen, flammable gases, and potential toxic air contaminants that may be present as a result of the processes that take place in or around the confined space. Next, you should consider a monitor that has either an internal or external pump that is capable of properly drawing the air sample back to your fresh air monitoring point during initial testing of the space. The monitor should also have the capability of continuously monitoring the occupied space to ensure the workers' safety. Other equipment such as sampling probes, durable carrying cases, and rechargeable batteries can be complementary accessories as well.
An instrument docking system can also be a plus when working in confined space applications. These systems provide the user with a myriad of beneficial capabilities, including the following functions:
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