TGS813 Datasheet, PDF (2/2 Pages) List of Unclassifed Manufacturers – TGS 813 - for the detection of Combustible Gases

Structure and Dimensions:
17 ± 0.5
um : mm
9.5
6
1
5
2
4
3
1 Sensing Element:
SnO2 is sintered to form a thick film on
the surface of an alumina ceramic tube
which contains an internal heater.
2 Cap:
Nylon 66
3 Sensor Base:
Nylon 66
4 Flame Arrestor:
100 mesh SUS 316 double gauze
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 (VRL) increases as the sensor's resistance (Rs) decreases, depending on
gas concentration.
Basic Measuring Circuit:
Standard Circuit Conditions:
Item
Symbol
Rated Values
Remarks
Heater Voltage
VH
5.0±0.2V
AC or DC
Circuit Voltage
VC
Max. 24V
DC only
Ps≤15mW
Load Resistance
RL
Variable
0.45kΩ min.
Electrical Characteristics:
Item
Symbol
Condition
Specification
Sensor Resistance
Rs
Methane at 1000ppm/air
5kΩ ~ 15kΩ
Change Ratio of
Sensor Resistance
Rs/Ro
Rs (Methane at 3000ppm/air)
Rs (Methane at 1000ppm/air)
0.60 ± 0.05
Heater Resistance
RH
Room temperature
30.0 ± 3.0Ω
Heater Power
Consumption
PH
VH=5.0V
835mW (typical)
Standard Test Conditions:
TGS 813 complies with the above electrical characteristics
when the sensor is tested in standard conditions as specified
below:
Test Gas Conditions: 20°±2°C, 65±5%R.H.
Circuit Conditions:
VC = 10.0±0.1V (AC or DC),
VH = 5.0±0.05V (AC or DC),
RL = 4.0kΩ±1%
Preheating period before testing: More than 7 days
Sensor Resistance (Rs) is calculated by
the following formula:
Rs
=
(
VC
VRL
-1) x RL
Power dissipation across sensor electrodes (Ps)
is calculated by the following formula:
REV: 9/02
FIGARO USA, INC.
3703 West Lake Ave. Suite 203
Glenview, Illinois 60025
Phone: [phone]
Fax: [phone]
email: [e-mail]
Ps =
VC² x Rs
(Rs + RL)²
For information on warranty, please refer to Standard Terms and
Conditions of Sale of Figaro USA Inc.