* These figures are for guidance only and are rounded to the nearest 5%. For the most accurate
measurements, the instrument should be calibrated with the gas under investigation. See RAE
Systems Technical Note TN-156 for more details and other compounds.
Caution:
Refer to RAE Systems by Honeywell Technical Note TN-144 for LEL sensor poisoning.
Year Of Manufacture
To identify the year and month of manufacture, refer to the two-digit marking placed adjacent to
the serial number on the instrument label according to the following table:
Year First digit Year code Month Second digit Month code
2014 R January 1
2015 S February 2
2016 T March 3
2017 U April 4
2018 V May 5
2019 W June 6
2020 A July 7
2021 B August 8
2022 C September 9
2023 D October A
2024 E November B
2025 F December C
E.G.: “RA” indicates that the monitor is manufactured in the month of October in the year 2014.
AreaRAE 141 User Manual
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