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PDF TGS2180 Data sheet ( Hoja de datos )
| Número de pieza | TGS2180 | |
| Descripción | water vapor detection | |
| Fabricantes | Figaro | |
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FIGARO
PRODUCT INFORMATION
Features:
TGS 2180 - water vapor detection for
automatic control of microwave ovens
Applications:
* Low power consumption
* High sensitivity to water vapor
* High temperature durability
* Long life and low cost
* Uses simple electrical circuit
* Small size
* Automatic cooking control in
microwave ovens
The sensing element is comprised of a metal oxide semiconductor layer formed
on an alumina substrate of a sensing chip together with an integrated heater.
The TGS 2180 has relatively high sensitivity to water vapor and low sensitivity
to organic vapors which may be generated from cooking food. The sensor's
conductivity increases depending on absolute humidity. A simple electrical
circuit can convert the change in conductivity to an output signal which
corresponds to absolute humidity.
Cooking condition can be detected by monitoring changes in sensor resistance
ratio, whcih can be uniquely determined depending on the type of food, but
independent from the food's weight. With quick response to water vapor and
excellent durability in high temperature operation, TGS 2180 is an ideal sensor
for automatic cooking time control in microwave ovens.
Due to miniaturization of the sensing chip, TGS 2180 requires a heater current
of only 166mA and the device is housed in a standard plastic housing package.
The figure below represents typical sensitivity characteristics,
all data having been gathered at standard test conditions (see
reverse side of this sheet). The Y-axis is indicated as sensor
resistance ratio (Rs/Ro) which is defined as follows:
Rs = Sensor resistance in water vapor at various
absolute humidities
Ro = Sensor resistance in clean air at 11.2g/m3 of
absolute humidity (corresponding to 20˚C/65%RH)
The figure below represents sensitivity to various gases. Again,
the Y-axis is indicated as sensor resistance ratio (Rs/Ro),
defined as follows:
Rs = Sensor resistance in vaious concentrations
of gases
Ro = Ro = Sensor resistance in clean air at 11.2g/m3 of
absolute humidity (corresponding to 20˚C/65%RH)
Sensitivity Characteristics to Water Vapor:
Sensitivity Characteristics to Various Gases:
10 Methane
Iso-butane
Hydrogen
CO
Ethanol
Air
1
1
0.1
1 10 100
Absolute humidity (g/m3)
1000
0.1
10
100
Concentration (ppm)
1000
IMPORTANT NOTE: OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED WILL VARY WITH EACH CUSTOMER’S SPECIFIC APPLICATIONS. FIGARO STRONGLY
RECOMMENDS CONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO SENSORS IN YOUR APPLICATION AND, IN PARTICULAR, WHEN CUSTOMER’S TARGET GASES
ARE NOT LISTED HEREIN. FIGARO CANNOT ASSUME ANY RESPONSIBILITY FOR ANY USE OF ITS SENSORS IN A PRODUCT OR APPLICATION FOR WHICH SENSOR HAS NOT BEEN
SPECIFICALLY TESTED BY FIGARO.
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