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參數(shù)資料
| 型號(hào)： | TGS821 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SPECIAL SENSOR FOR HYDROGEN GAS |
| 中文描述： | 特別傳感器的氫氣 |
| 文件頁(yè)數(shù)： | 2/2頁(yè) |
| 文件大?。?/td> | 113K |
| 代理商： | TGS821 |
Structure and Dimensions:
1
Sensing Element:
SnO
2
is sintered to form a thick film on
the surface of an alumina ceramic tube
which contains an internal heater.
2
Sensor Base:
Alumina ceramic
3
Flame Arrestor:
100 mesh SUS 316 double gauze
Item
Symbol
Rated Values
Remarks
Heater Voltage
VH
V
H
5.0±0.2V
AC or DC
Circuit Voltage
VC
V
C
Max. 24V
AC or DC
*PS 15mW
Load Resistance
RL
R
L
Variable
*PS 15mW
Standard Circuit Conditions:
Pin Connection and Basic Measuring Circuit:
The numbers shown around the sensor symbol in the circuit diagram at the
right correspond with the pin numbers shown in the sensor's structure drawing
(above). When the sensor is connected as shown in the basic circuit, output
across the Load Resistor (V
RL
) increases as the sensor's resistance (Rs) de-
creases, depending on gas concentration.
Sensor Resistance (Rs) is calculated by
the following formula:
V
C
V
RL
Rs = (
-1) x R
L
Power dissipation across sensor electrodes
(Ps) is calculated by the following formula:
2
V
C
x Rs
2
(Rs + R
L
)
Ps =
Standard Test Conditions:
TGS 821 complies with the above electrical characteristics
when the sensor is tested in standard conditions as speci-
fied below:
Test Gas Conditions:
20
°±
2
°
C, 65
±
5%R.H.
Circuit Conditions:
V
C
= 10.0
±
0.1V (AC or DC),
V
H
= 5.0
±
0.05V (AC or DC),
R
L
= 4.0k
±
1%
Preheating period before testing: More than 7 days
Electrical Characteristics:
Rs
R
H
P
H
Basic Measuring Circuit:
REV: 9/99
α
Item
Symbol
Condition
Specification
Sensor Resistance
Hydrogen at 100ppm/Air
1k ~ 10k
Change Ratio of
Sensor Resistance
Log[Rs(H2 100ppm)/Rs(H2 1000ppm)]
Log (1000ppm / 100ppm)
0.6~1.20
Heater Resistance
Room temperature
38.0 ± 3.0
Heater Power
Consumption
VH=5.0V
660 ± 55 mW
FIGARO USA, INC.
3703 West Lake Ave. Suite 203
Glenview, Illinois 60025
Phone:
(847)-832-1701
Fax:
(847)-832-1705
email: figarousa@figarosensor.com
For information on warranty, please refer to Standard Terms and
Conditions of Sale of Figaro USA Inc.
um : mm
19.5
±
0.5
1.0
±
0.05
13.5- 0.2
9.5
±
0.3
1
±
2
±
3
±
6
±
6
3
4
2
5
1
4
4
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