Datasheet

ENS160 Datasheet v0.95 preliminary / December 2020
11
6 Single Gas Signal Characteristics
Figure 5: Example Response of the
ENS160 to Various Gases
Since metal oxide sensors exhibit a
broadband sensitivity to both
reducing and oxidizing gases, their
raw output signals represent the
resulting sum of the entire gas
mixture, present. Such sum-signals
are beneficial when it comes to
wideband TVOC- or AQI-applications,
but unsatisfactory for the detection
of single gases.
The opposite table shows the
response of the ENS160 to a variety of
individual gases that can be found
indoors.
The below table provides a list of selected gases that have been individually characterized.
Table 7: Single Gas Signal Characteristics
Target Gas
Specified Range
Unit
Register
Comment
Ethanol
0 to 6
ppm
DATA_ETOH (0x22) = DATA_TVOC
Dedicated Register
Hydrogen
0 to 10
ppm
R4
raw
= GPR_READ[6:7]
R
iraw
= raw
resistance values
that need to be
calibrated to target
gas. See text below.
Acetone
0 to 32
ppm
R4
raw
= GPR_READ[6:7]
Carbon Monoxide
0 to 90
ppm
R4
raw
= GPR_READ[6:7]
Toluene
0 to 32
ppm
R4
raw
= GPR_READ[6:7]
Measurement values for individual gases can be obtained from dedicated device registers or
calculated from sensor raw resistance values as specified in above table. See sections
Gas Sensor Raw Resistance Signals for further information.
Figure 6: Example Response of the ENS160 to Ethanol