FEATURES
|
|
PRODUCT
LIST
Application |
Model |
Target
gas/ detection range |
Features |
Combustible gas detection |
TGS 2610 |
General combustible gases (500 ~ 10,000 ppm) |
· For wide range of gases |
TGS 2611 |
Methane, Natural gas (500 ~ 10,000 ppm) |
· Low sensitivity to interfering gases |
|
TGS 2612 |
LPG & LNG (500 ~ 10,000 ppm) |
· Miniature size · Low -power consumption |
|
TGS 2613 |
Hydrogen (50 ~ 1,000 ppm) |
· High selectivity and sensitivity to hydrogen |
|
Toxic gas detection |
TGS 2640 TGS 2440 |
Carbon monoxide (30 ~ 1,000 ppm) |
· High sensitivity and selectivity to CO2 · Microprocessor and hybrid IC available |
TGS 2641 |
Combustion exhaust |
· Sensitive to CO & H2 |
|
TGS 2642 |
Ammonia (30 ~ 300 ppm) |
· High sensitivity to ammonia |
|
TGS 2643 |
Hydrogen sulfide (5 ~ 100 ppm) |
· High sensitivity to H2S |
|
Solvent vapour detection |
TGS2620 |
Alcohol, toluene, xylene, etc. 50 ~ 5,000 ppm |
· High sensitivity to alcohol and organic solvents |
Air quality control |
TGS 2100 TGS 2400 TGS 2600 |
General
air contamination 1 ~ 10 ppm |
· High sensitive detection of contaminants in air with microprocessors · Pre-calibrated sensor modules available |
TGS 2101 TGS 2601 |
Cigarette smoke 1~10 ppm. |
||
Cooking control |
TGS 2181 TGS 2281 |
Fumes from food, odor Alcohol (10~1,000 ppm) Water vapour (1~150g/m3) |
· Total gas and alcohol gas detection in cooking process |
TGS 2180 |
Water vapor from food |
· High sensitivity to water vapor in cooking process |
|
Automobile |
TGS 2104 TGS 2201 |
Gasoline exhaust Diesel exhaust |
· For automatic ventilation control in automobile |
GAS DETECTION MECHANISM
When sensor is heated to a high temperature, e.g.. 400°C, without the presence of oxygen, free electrons flow easily through the grain boundaries of the tin dioxide (SnO2-X) particles. In clear air, oxygen, which traps free electrons by its electron affinity, is adsorbed on to the tin dioxide particle surface forming a potential barrier in the grain boundaries. This potential barrier (eVs in air) restricts the flow of electrons, causing the electric resistance to increase (Fig. 1-1). |
When the sensor is exposed to an atmosphere containing reducing gases, e.g. combustible gases, CO, etc, the tin dioxide surface adsorbs these gas molecules and causes oxidation (Fig. 1-2). This lowers the potential barrier, allowing electrons to flow more easily, thereby reducing the electrical resistance (Fig. 1-3). Reaction between gases and surface oxygen will vary depending upon the sensor element's temperature and the activity of sensor materials. |
|
APPLICATIONS
CATEGORY |
DOMESTIC FIELD |
COMMERCIAL/ INDUSTRIAL FIELDS |
Combustible
gases -
Methane -
Propane -
Hydrogen -
Others |
·
Gas alarms for homes, recreational vehicles, boats |
·
Gas detection systems for commercial buildings, industrial plants,
onshore and offshore gas and oil platforms, petrochemicals ·
Portable gas detectors |
Toxic
gases -Carbon
monoxide -Ammonia -Hydrogen
sulfide |
·
CO detectors for homes, recreational for homes, recreational vehicles,
boats, combustion appliances ·
Fire alarms |
|
Alcohol |
·
Breath alcohol checkers |
·
Breath alcohol checkers for professionals |
Solvent
vapor |
|
·
Solvent detection for factories, dry cleaning industry and
semiconductor industry. |
Halcarbon
gases (CFCs,
HCFCs, etc) |
|
·
Halocarbon detection for refrigerators, air conditioners, cleaning
processes for electrical components, etc |
Odor
detection -
Sulfide -
Amine |
·
Mouth odour checkers ·
Odor detection in refrigerators |
·
Odour monitors for dentists ·
Odour measuring systems for the food industry |
Others
- Oxygen
-CO2
|
·
Oxygen monitors ·
Air quality control ·
Air conditioner |
·
Oxygen detectors ·
Carbon dioxide monitor ·
Office air conditioning |
For further information please Email us at: sales@tashika.co.jp