Datasheet

Revised 08/12
11
TECHNICAL INFORMATION FOR TGS3870
0.01
0.1
1
10
0 5 10 15 20 25 30
CO 100ppm
CO 300ppm
CO 900ppm
Rs/Ro
Time (days)
3 hours after test
test
0.1
1
10
0 5 10 15 20 25 30
Methane 1000ppm
Methane 3000ppm
Methane 9000ppm
Rs/Ro
Temperature (˚C)
3 hours after test
test
Figure 14a - Effects of variable ambient temperature test on
methane sensing
(Ro = Rs in 3000ppm of CH4 at Day=0, VH =0.9)
Figure 14b - Effects of variable ambient temperature test on
CO sensing
(Ro = Rs in 100ppm of CO at Day=0, VH =0.2)
3-4 Variable ambient temperature test
To show the ability of TGS3870 to withstand the
effects of high and low temperatures representative
of shipping and storage, the sensor was subjected
to the conditions of UL2034 Sec. 44.2-Effect of
Shipping and Storage. Unenergized test samples
were subjected to 70˚C for 24 hours, allowed to cool
in room temperature for 1 hour, subjected to -40˚C
for 3 hours, and then allowed to warm up to room
temperature for 3 hours.
No signicant effects can be seen on the CO sensing
characteristics of the sensor during and after this
test, while methane sensing characteristics were
unaffected by this test.
Rs/RoRs/Ro