Factory-Set Alarm Thresholds and Setpoints
|
Check the device or calibration certificate for exact alarm levels as they vary depending on national or corporate regulations. |
|
Sensor |
LOW alarm |
HIGH alarm |
SETPOINT min |
SETPOINT max |
STEL |
TWA |
|
CL2 |
0.5 ppm |
1.0 ppm |
0.3 ppm |
7.5 ppm |
1.0 ppm |
0.5 ppm |
|
ClO2 |
0.1 ppm |
0.3 ppm |
0.1 ppm |
0.9 ppm |
0.3 ppm |
0.1 ppm |
|
CO |
25 ppm |
100 ppm |
7 ppm |
1700 ppm |
100 ppm |
25 ppm |
|
CO-HC |
25 ppm |
100 ppm |
10 ppm |
8500 ppm |
100 ppm |
25 ppm |
|
COMB |
10 % LEL |
20 % LEL |
5 % LEL |
60 % LEL |
--1 |
--1 |
|
H2S |
10 ppm |
15 ppm |
2 ppm |
175 ppm |
15 ppm |
10 ppm |
|
H2S-LC |
5 ppm |
10 ppm |
0.3 ppm |
70 ppm |
10 ppm |
1 ppm |
|
HCN |
4.5 ppm |
10.0 ppm |
2.0 ppm |
20.0 ppm |
10 ppm |
4.5 ppm |
|
NH3 |
25 ppm |
50 ppm |
10 ppm |
75 ppm |
35 ppm |
25 ppm |
|
NO |
25 ppm |
75 ppm |
15 ppm |
100 ppm |
25 ppm |
25 ppm |
|
NO2 (S 20) |
2.0 ppm |
5.0 ppm |
1.0 ppm |
17.5 ppm |
5.0 ppm |
2.0 ppm |
|
NO2 (XCell) |
2.5 ppm |
5.0 ppm |
0.5 ppm |
47.5 ppm |
5.0 ppm |
2.5 ppm |
|
O2 |
19.5 % |
23.0 % |
5.0 % |
24.0 % |
--1 |
--1 |
|
PH3 |
0.3 ppm |
1.0 ppm |
0.3 ppm |
3.75 ppm |
1.0 ppm |
0.3 ppm |
|
PID |
50 ppm |
100 ppm |
2 ppm |
1500 ppm |
25 ppm |
10 ppm |
|
SO2 |
2.0 ppm |
5.0 ppm |
0.5 ppm |
17.5 ppm |
5.0 ppm |
2.0 ppm |
1STEL and TWA not applicable for combustible and oxygen gases.
In environments with >100 % LEL combustible gas present, devices with a catalytic combustible LEL sensor will be in a latching over-range alarm.