A confined space is defined by the following characteristics;
• Limited or restricted natural ventilation• Too small to allow for continuous work occupancy• Limited openings for entry and / or exit
Due to the limited volume size, confined spaces can quickly become extremely hazardous, dangerous gases tend to build up a lot quicker than in a non-confined space. Typical gases in a confined space include; hydrogen sulphide, carbon monoxide, methane and a deficiency of oxygen. Although these are the most commonly found gases, other gases can arise; this is why it is essential for the user to wear a multi gas detector. The Ventis MX4 from Industrial Scientific detects from one to four gases including oxygen, combustible gases and two toxic gases including carbon monoxide, hydrogen sulphide, sulphur dioxide and nitrogen dioxide.
Packed with features, both aesthetic and intrinsic, the MX4 is designed to stand out in confined space monitoring. From the off, the optional bright “safety coloured” orange outer casing provides added luminosity in a dark confined space. In addition to this, the MX4 is equipped with a back lit liquid crystal display (LCD), which allows the user to simultaneously view and access readings from all four sensors. The optional orange casing teamed with the large LCD ensures maximum visibility in a confined space.
A prerequisite of confined space entry (as defined by Confined Spaces Regulations 1997) is to pre-test the confined space, stating that “it may be necessary to check that it is free from both toxic and flammable vapours and that it is fit to breathe.” To allow for pre-testing, the MX4 can be fitted with an optional integral sample pump to allow it to draw samples from up to 100 ft away; if the
sample line becomes obstructed or compromised then a small alarm will sound. Furthermore, the MX4 is equipped with audible, visual and vibrating alarms to provide an indication of when atmospheric conditions are unsafe for entry into the space.
The equipped lithium-ion battery is rechargeable and allows up to 12 continuous hours of external sampling time from outside of the entry point. To bolster the perfomance of the MX4, an interchangeable alkaline battery pack is available for use in emergency situations; the battery pack extends monitoring operations for up to several days.
In accordance with safe work in confined spaces it is mandatory that the assessment must include consideration of the working materials and tools “testing should be carried out by a competent person using a suitable gas detector which is correctly calibrated.” The only way to ensure that a gas detector will accurately respond to the gases it is designed to detect is to calibrate the sensors against a known gas standard. Atmospheric hazards have a higher likelihood of occurring in confined spaces and as a result there is a much higher fatality rate, emphasising the importance of a fully working detector. The DS2 docking station from Industrial Scientific is designed to work with the MX4. It carries out automated tests, calibration and record keeping functions; providing the complete confined space solution for any industry.
Confined Space Monitoring with the Ventis MX4
To find out more about our range of gas detection products call 0151 666 8300 or email [email protected]
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