FIGARO-TGS 2602

FIGARO PRODUCT INFORMATION
Applications: Features:
TGS 2602 - for the detection of Air Contaminants
The figure below represents typical sensitivity characteristics,
all data having been gathered at standard test conditions (see
reverse side of this sheet).  The Y-axis is indicated as sensor
resistance ratio (Rs/Ro) which is defined as follows:
Rs = Sensor resistance in displayed gases at
various concentrations
Ro = Sensor resistance in fresh air
The figure below represents typical temperature and humidity
dependency characteristics.  Again, the Y-axis is indicated as
sensor resistance ratio (Rs/Ro), defined as follows:
Rs = Sensor resistance in fresh air
at various temperatures/humidities
Ro = Sensor resistance in fresh air
at 20°C and 65% R.H.
* Air cleaners
* Ventilation control
* Air quality monitors
* VOC monitors
* Odor monitors
The sensing element is comprised of a metal oxide semiconductor layer formed
on the alumina substrate of a sensing chip together with an integrated heater.
In the presence of detectable gas, sensor conductivity increases depending on
gas concentration in the air.  A simple electrical circuit can convert the change
in conductivity to an output signal which corresponds to the gas concentration.
The TGS 2602 has high sensitivity to low concentrations of odorous gases such
as ammonia and H2S generated from waste materials in office and home
environments. The sensor also has high sensitivity to low concentrations of
VOCs such as toluene emitted from wood finishing and construction products.
Figaro also offers a microprocessor (FIC02667) which contains special soft-
ware for handling the sensor's signal for appliance control applications.
Due to miniaturization of the sensing chip, TGS 2602 requires a heater current
of only 42mA and the device is housed in a standard TO-5 package.
* High sensitivity to VOCs and odorous gases
* Low power consumption
* High sensitivity to gaseous air
         contaminants
* Long life
* Uses simple electrical circuit
* Small size
Temperature/Humidity Dependency: Sensitivity Characteristics:
0.01
0.1
1
10
0.1110100
Sensor Resistance Ratio (Rs/Ro)
Gas concentration (ppm)
Hydrogen
sulfide
Toluene
Ammonia
Ethanol
Hydrogen
Air
0.1
1
10
0102030405060
Sensor Resistance Ratio (Rs/Ro)
Ambient temperature (˚C)
40% R.H.
65% R.H.
85% R.H.
深圳市新世联科技有限公司
手机：15018532664
邮箱：s201@apollounion.com
座机：0755-83680810-818（分机）
地址：深圳市深南中路2066号华能大厦712室
联系人：胡保定Structure and Dimensions:
Basic Measuring Circuit:
The sensor requires two voltage inputs:
heater voltage (VH) and circuit voltage
(VC).  The heater voltage (VH) is applied
to the integrated heater in order to
maintain the sensing element at a
specific  temperature which is optimal
for sensing.  Circuit voltage (VC) is
applied to allow measurement of voltage
(Vout) across a load resistor (RL) which
is connected in series with the sensor.
DC voltage is required for the circuit
voltage since the sensor has a polarity.
A common power supply circuit can be
used for both VC and VH to fulfill the
sensor's electrical requirements.  The
value of the load resistor (RL) should be
chosen to optimize the alarm threshold
value, keeping power consumption (PS)
of the semiconductor below a limit of
15mW.  Power consumption (PS) will
be highest when the value of Rs is
equal to RL on exposure to gas.
The value of power consumption (PS) can
be calculated by utilizing the following
formula:
PS =
Sensor resistance (Rs) is calculated with
a measured value of Vout by using the
following formula:
RS =                   - RL
Specifications:
VC x RL
   Vout
(VC - Vout)
2
       RS
r e b m u n l e d o M0 0 B - 2 0 6 2 S G T
e p y t t n e m e l e g n i s n e S1 D
e g a k c a p d r a d n a t Sn a c l a t e m 5 - O T
s e s a g t e g r a Ts t n a n i m a t n o c r i A
e g n a r n o i t c e t e d l a c i p y Tf o m p p 0 3 ~ 1H O t E
t i u c r i c d r a d n a t S
s n o i t i d n o c
e g a t l o v r e t a e H VH 0 . 5 ± C A / C D V 2 . 0
e g a t l o v t i u c r i C VC 0 . 5 ± C D V 2 . 0s P ≤ W m 5 1
e c n a t s i s e r d a o L RL e l b a i r a Vk 5 4 . 0 Ω . n i m
l a c i r t c e l E
s c i t s i r e t c a r a h c
t s e t d r a d n a t s r e d n u
s n o i t i d n o c
e c n a t s i s e r r e t a e H RH 9 5 . x o r p p a Ω . p m e t m o o r t a
t n e r r u c r e t a e H IH 6 5 ± A m 5
r e w o p r e t a e H
n o i t p m u s n o c
PH ) l a c i p y t ( W m 0 8 2
e c n a t s i s e r r o s n e S s Rk 0 0 1 ~ k 0 1 Ω r i a n i
y t i v i t i s n e S
) s R f o o i t a r e g n a h c (
5 . 0 ~ 5 1 . 0 ) H O t E f o m p p 0 1 ( s R
) r i a ( s R
t s e t d r a d n a t S
s n o i t i d n o c
s n o i t i d n o c s a g t s e T r i a l a m r o n
0 2 t a ± 5 6 , C ˚ 2 ± H R % 5
s n o i t i d n o c t i u c r i C VC 0 . 5 = ± C D V 1 0 . 0
VH 0 . 5 = ± C D V 5 0 . 0
d o i r e p g n i n o i t i d n o C
t s e t e r o f e b
s y a d 7
Bottom view
Top view
Side view
ø9.2±0.2
7.8±0.5
10.0±1.0
3.6±0.1
1
2 3
Sensing
element
4
3.6±0.1
ø8.1±0.2
ø0.55±0.05
ø5.1
90˚
1.6
1.6
ø0.5 x 6
0.9 0.9
1958