PRODUCT INFORMATIONTGS 8410 - for the detection of Methane
Features:

Applications:* Low power consumption* High sensitivity and selectivity to methane* Long life

* Portable/pocket type methane gas detectors* Battery operable/wireless gas detectors* Leak detection for natural gas vehicles* Leak detection for gas pipelines* Safety measures for lithium-ion batteries

The sensing element is comprised of a sensing chip and an integrated heater
formed on a silicon substrate using MEMS technology, and a metal-oxide
semiconductor layer formed on the sensing chip. Due to miniaturization of
the sensing chip, TGS8410 requires a heater power consumption of only
0.087mW(ave.), and is suitable for low-power equipment and battery-operated
instruments. In the presence of detectable gas, sensor conductivity increases
depending on gas concentration in the air. A simple electrical circuit can convert
the change in conductivity to an output signal which corresponds to the gas
concentration.
The TGS8410 uses filter material in its housing for eliminating the influence ofinterference gases such as alcohol, resulting in highly selective response tomethane gas. This feature makes the sensor ideal for residential gas leakage
detectors which require durability and resistance against interference gas.
The figure below represents typical sensitivity characteristics,
all data having been gathered at standard test conditions (seereverse side of this sheet). The Y-axis is indicated as sensor
resistance ratio (Rs/Ro) which is defined as follows:
Rs = Sensor resistance in displayed gases at		various concentrations
Ro = Sensor resistance in 3000ppm of methane

The figure below represents typical temperature dependencycharacteristics. Again, the Y-axis is indicated as sensor resistanceratio (Rs/Ro), defined as follows:
Rs = Sensor resistance in 3000ppm of methane		
at various temperatures
Ro = Sensor resistance in 3000ppm of methane		at 20°C and 65% R.H.

Sensitivity Characteristics:
10Temperature Dependency:
10Air

Rs/Ro

Rs/Ro

Hydrogen
1Rs/Ro

65%RH
1Methane

0.1

1000

10000
Gas concentration (ppm)

0.1

-100

10

2030

40

50

60

Ambient temperature (∞C)

IMPORTANT NOTE: OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED WILL VARY WITH EACH CUSTOMER’S SPECIFIC APPLICATIONS. FIGARO STRONGLYRECOMMENDS CONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO SENSORS IN YOUR APPLICATION AND, IN PARTICULAR, WHEN CUSTOMER’S TARGETGASES ARE NOT LISTED HEREIN. FIGARO CANNOT ASSUME ANY RESPONSIBILITY FOR ANY USE OF ITS SENSORS IN A PRODUCT OR APPLICATION FOR WHICH SENSOR HASNOT BEEN SPECIFICALLY TESTED BY FIGARO.

PRODUCT INFORMATION(+)

Basic Measuring Circuit:The sensing element is heated by anintegrated heater connected to pin Nos.
1 and 4. The sensor requires applicationof a 30-second heater voltage cycle
comprised of a 1.9V pulse (VH) being
applied to the heater for 0.1 seconds,
followed by 0V for the remaining 29.9
seconds.
Circuit voltage (VC) is applied across thesensing element which has a resistance(Rs) between the sensor’s two electrodes(pin Nos. 2 and 3) and a load resistor(RL) connected in series. A 2.0V circuit
voltage pulse is applied for the final 0.002
seconds of each VH pulse, followed by0V for the remaining period.

430sec
1.9V

3RHRS

VHPulseGAS

21PulseVH
0.1sec

VC02.0V

RL
VOUT(VRL)

VC
0.002sec

Basic measuring circuit0( )The sensor's signal should be measured
during the 0.002 second VC pulse (seetiming chart). The numbers shown aroundthe sensor symbol in the circuit diagram
correspond with the pin numbers shownin the structure drawing.

Structure and Dimensions:

Sensing principle

MOS typeStandard package

TO-5 metal canTarget gas

MethaneTypical detection range

1 ~ 25% LEL

Electricalcharacteristics
understandard testconditions

Heater voltage

VH

VHH=1.9V±3% DC for 0.1sec
VHL=0.0V for 29.9sec.

Circuit voltage

VC

2.0V±2% DC pulse

Load resistanceRLvariable (2kΩ min.)Heater resistance

RHapprox. 60Ω at room temp.

Heater current

IH

12.7~15mA at VH=1.9V

Heater power
consumption

PH

0.087mW (ave.)

Sensor resistanceRS

3~160kΩ in 3000ppm methane

Sensitivity(change ratio of Rs)

Standard test
conditions

0.48~0.68

Rs (3000ppm methane)Rs (1000ppm methane)

Test gas conditions

methane in air
at 20±2˚C, 65±5%RH

Circuit conditions

same as std circuit conditions

Conditioning period
before test

3 days or longer

Top View

φ9.2±0.2
φ8.1±0.2

Side View

12.5±1.0

TGS841010.0±1.0

Model number

φ0.55±0.05
3.6±0.1

Bottom View4132

3.6±0.1

Specifications:Standardcircuitconditions

Timing chart90°

φ5.1±0.1
Unit : mm

Pin connection:

Sensor resistance (Rs) is calculated witha measured value of VOUT(VRL) by using
the following formula:		VRS = ( C - 1) x RL
VRLAll sensor characteristics shown in this brochurerepresent typical characteristics. Actualcharacteristics vary from sensor to sensor. The
only characteristics warranted are those in theSpecification table above.

REV: 01/24

1:Heater
2:Electrode(-)
3:Electrode(+)
4:Heater

Before purchasing this product,
please read the Warranty Statements
shown in our webpage by scanning
this QR code.

FIGARO ENGINEERING INC.
费加罗技研株式会社
1-5-11
Senba-nishi
大阪府箕面市船場西1-5-11
Mino,
Osaka 562-8505 JAPAN邮编：562-8505
Phone:(81)-727-28-2045
電話：81-72-728-2044

https://www.figaro.co.jp/en/pdf/Limited_Warranty_en.pdf

URL：www.figaro.co.jp/en/