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* 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
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
E.G.: "RA" indicates that the monitor is manufactured in the month of October in the year 2014.
AreaRAE
R
S
T
U
V
W
A
B
C
D
E
F
Month
January
February
March
April
May
June
July
August
September
October
November
December
141
Second digit Month code
1
2
3
4
5
6
7
8
9
A
B
C
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