Datasheet TGS4161 (Figaro) - 2

PRODUCT INFORMATION PRODUCT INFORMA Basic Measuring Circuit:
functions as a kind of battery, the The TGS4161 sensor requires heater EMF value itself would drift using this
Operational Amplifier
voltage (V
IBIAS < typ. 1pA
H) input. The heater voltage is basic measuring circuit. However, the applied to the integrated heater in order change of EMF value (∆EMF) shows a + to maintain the sensing element at a stable relationship with the change of
1 2
- specific temperature which is optimal for CO2 concentration. Therefore, in order sensing. Electromotive force (EMF) of to obtain an accurate measurement
VH EMF
the sensor should be measured using a of CO2, a special microprocessor for high impedance (>100 GΩ) operational signal processing should be used with
4 3 TGS4161
amplifier with bias current < 1pA (e.g. TGS4161. Figaro can provide a special
GND
Texas Instruments' model #TLC271). evaluation sensor module (AM-4-4161) Since the solid electrolyte type sensor for TGS4161.
Specifications: Structure and Dimensions:
o M e d l u n mb r e G T S 4 1 6 1 S n e s g n i e m e l e nt t p y e So d il e e l t c o r t yl e r a T get ga e s s C r a bon d o i e d ix y T p ci l a d t e ecti n o r g n a e 5 3 0 ~ 10 0 0 , 0 p m p
Top view
a e H t r e r t si s e c n a e RH 0 7 ± 7Ω at o r m o t m e . p e H t a r e c r u n e r t IH ap r p o . x 5 A m 0 He t a r e pow r e c s n o m u t p i n o PH ap r p x o . 0 5 2 mW ø9.2±0.2 E e l rt c ci l a h c ara t c e si r itcs Eel tcr o m o t vie f r o ce EMF 2 ~ 0 2 9 4 0 V m in 5 3 p 0 m p O C 2 ø8.1±0.2 e S n is it iv y t ∆EMF 4 4 ~ m 2 7 V EMF 3 ( 0 5 ppm CO2)- Sensing M E F( 5 3 00p m p O C 2) element Heater vol a t ge VH 0 . 5 ± 0.2V C D ( ) e R p s o s n e it e m ap o r p x. 5 . 1 m . n i S s n e r o a h c r t c a e si r t s ci ( o t 9 % 0 f o f a n i l ∆E F M va u l e) 12.4±1.0 e M s a ur m e ent c a u c r c a y a r p p ox. ± % 0 2 t a , 1 000 p p m O C 2
Side
p O e a r n it g o c i d n it n o s 1 - 0 0 5 ~ , C ˚ 5~9 % 5 RH
view
t S ro a r ge o c d n i ito s n 0 2 - 6 ~ 0 , C ˚ 5 9 ~ H R % 0
t s ( o e r n i i o m t s u e r p o r f o a b g w h ti s lii a c e g )l
Te t s g s a o c d n it o i n CO2 n i i a r at 0 2 ±2 C ˚ , 5 6 ± % 5 RH 10.0±1.0 d r a d n a t S e t t s o c d n o iti s n i C r u c ti o c d n i iton VH = 0 . 5 ±0 0 . V 5 C D o C n i d ti n o n i g per o i d b f e r o e te t s 2 1 ho r u s r o lon e g r
Sensing Element Structure:
ø0.55±0.05 3.6±0.1
Bottom view
4 1 90˚ 3 2 3.6±.1 ø5.1
Pin Connection:
u/m = mm 1. Heater (+) 2. Counter electrode (+) 3. Sensing electrode (-) 4. Heater (-)
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