Confined Space Detector for Harmful Gas Detection
The detection of harmful gases in confined spaces requires the detector to enter the detection in advance. It is necessary to remotely detect the composition of harmful gases in confined spaces before personnel enter. Detection is performed in the following order:
(1) Oxygen confirmation, detecting the current oxygen concentration level;
(2) Confirmation of flammable gases, detection of changes in flammable gases;
(3) Toxic gas confirmation, to detect whether the concentration of each toxic gas is lower than the allowable exposure limit PEL stipulated by OSHA. The usual toxic gases in confined spaces are hydrogen sulfide, carbon monoxide, and other toxic compounds are not among them. RAE's detectors can detect a single gas or a mixture of toxic gases at the same time.
It is very important to take samples at the top, middle, and bottom of the confined space to detect the concentration of various gases or vapors. Some gases are lighter than air (like methane and flammable gases) and they can be collected in the upper part of a confined space; some gases are heavier than air (like hydrogen sulfide) and they can be found in the bottom of a confined space; there are others The specific gravity is almost as heavy as air (like carbon monoxide) and they can be detected in the middle of an enclosed space.
Sampling at different heights in the confined space, and performing continuous detection according to the actual situation, we will find that the detection results are different.
As a remote air detector deployed in the area, we can enter the restricted area according to its continuous detection information. A confined space enters the detector probe or observation port to continuously send the detection results to the peripheral personnel. Conditions in confined spaces change all the time, even without alarms, following leaks, releases of toxic vapors, or changes in the space.
Detectors are used for confined space entry.
RAE has recently introduced an innovative Confined Space Entry Detector (CSE) that incorporates all the functionality of a multi-gas detector. Named Q-RAE Confined Space Entry Detector. The instrument is preset with many convenient tools for the test gases required by OSHA 29CFR 1910.146. Thanks to these presets we can work more efficiently when detecting flammable gases, hydrogen sulfide, carbon monoxide, and oxygen in varying amounts.
oxygen concentration
Oxygen levels given by OSHA range from 19.5% to 23.5%. MultiRAE has a preset alarm for this, the instrument will send out an alarm when it is lower than 19.5% and higher than 23.5%, and the user can choose this setting to send out an alarm function under harmful conditions.
flammable gas
Flammable gas concentrations below 100% LEL. MultiRAE also has pre-set alarms. The alarm of flammable gas is set at 10%LEL concentration, the high alarm value is set at 20%LEL, and the user can choose the desired set point.
toxic gas
The alarm value is pre-set within the exposure limit range allowed by OSHA. MultiRAE preset hydrogen sulfide low alarm value is 10ppm, high alarm value is 20ppm. The preset carbon monoxide low alarm value is 35ppm and the high alarm value is 200ppm. Users can choose these values according to actual needs. MultiRAE also offers sensors for toxic gas detection.
