The 1-Series and 8-Series of Figaro Gas Sensors are bulk type metal ... Air quality control. Cooking control ..... 3703 West Lake Avenue, Suite 203. Glenview, IL ...
1-Series 8-Series The 1-Series and 8-Series of Figaro Gas Sensors are bulk type metal oxide semiconductor sensors. Field proven metal oxide materials and Figaro's original bulk shape sintered sensor elements ensure high sensitivity, long sensor life and reliability. A wide variety of sensor models are offered to choose from for specific needs of gas detection.
Product List Application
Combustible gas detection
Target gas
1-Series
8-Series R-type
C-type
General hydrocarbons
TGS813
TGS816
Methane Natural gas
TGS842
Hydrogen Solvent vapor detection Halocarbon gas detection
Toxic gas detection
Odor detection
TGS821
Alcohol Organic solvents
TGS822
TGS823
R-22
TGS830 TGS831
R-134a
TGS832
Carbon monoxide
M-type
TGS203
Ammonia
TGS826
Hydrogen sulfide
TGS825
Ammonia/amine
TGS826
Water vapor
TGS883
Fumes from food (alcohol, odor)
TGS880 TGS882
Cooking control
air Air quality control General contaminants
TGS800
Automobile Gasoline exhaust ventilation control
TGS822
Sensor structure and packaging
Each sensor requires two voltage inputs. Heater voltage(VH) is applied to the heater coil to maintain the sensing element at the elevated working temperature required to attain the best sensor performance. A circuit voltage(VC) is applied to allow measurement of the voltage(V out ) across a load resistor(RL) which is connected in series with the sensor.
threshold value or output voltage range for signal processing. The value of RL should be chosen to keep the power consumption of the metal oxide semiconductor(PS) below a limit of 15 mW. The value of Ps will be highest when the value of sensor resistance(R S) is equal to RL on exposure to gas. The value of Ps is calculated using the following formula:
With the exception of TGS203, a common power supply circuit can be used for both VC and VH to fulfill the electrical requirements specified for each type of sensor.
(Vc Vout)2 Rs
Ps
The value of R L can be chosen to optimize the alarm
1-series Element structure
Sintered SnO2
1-series sensors have two coiled electrodes made of iridium/ palladium alloy which are encapsulated inside the sintered sensor element and are used as the heater. Pd-Ir alloy wire (heater and electrode)
Structure
Basic measuring circuit High 0.80V Heater voltage
60sec-High Timer
RL
TGS
V OUT
90sec-Low
Heater voltage
High 0.80V Low 0.25V
(Output signal)
Low 0.25V
Vc
Circuit conditions Circuit voltage(Vc) :12v max. AC or DC Heater voltage(VH) : High 0.80V(60sec)ACorDC Low 0.25V(90sec)ACorDC Load resistance(RL) : variable (Ps
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