PRODUCT INFORMATIONTGS 2611-E00 - for the detection of Methane
Features:

Applications:* High selectivity to methane* Low power consumption* Long life and low cost
* Uses simple electrical circuit* Domestic gas alarms* Portable gas detectors* Gas leak detector for gas appliances

TGS2611-E00 is a semiconductor type gas sensor which combines very highsensitivity to methane gas with low power consumption and long life. Due tominiaturization of its sensing chip, TGS2611-E00 requires a heater current ofonly 56mA and the device is housed in a standard TO-5 package.
TGS2611-E00 uses filter material in its housing which eliminates the influenceof interference 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 TGS2611-E00 is able to satisfy the requirements of performance standards
such as UL1484 and EN50194.

The figure below represents typical sensitivity characteristics,
all data having been gathered at standard test conditions (seereverse side of this sheet). The Y-axis indicates sensor resistance ratio (Rs/Ro) which is defined as follows:
Rs = Sensor resistance at various concentrations
Ro = Sensor resistance in 5000ppm of methane
Sensitivity Characteristics:

The figure below represents typical temperature and humidity
dependency characteristics. The Y-axis indicates sensor
resistence ratio (Rs/Ro), defined as follows:
Rs = Sensor resistance in 5000ppm of methane at		various temp/humidities
Ro = Sensor resistance in 5000ppm of methane at		20˚C/65%RH
Temperature and Humidity Dependency:
1010035%50%65%80%95%

AirEthanol

10Rs/Ro

1Rs/RoHydrogen

1Methane

Gas: 5000ppm methane

0.10.1100100010000Gas concentration (ppm)

100000-20-1001020304050Ambient 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 HAS
NOT BEEN SPECIFICALLY TESTED BY FIGARO.

60

PRODUCT INFORMATION
Basic Measuring Circuit:(+)

The sensor requires two voltage
inputs: heater voltage (VH) and circuit
voltage (VC). The heater voltage (VH)
is applied to the integrated heater inorder to maintain the sensing element
at a specific temperature which is
optimal for sensing. Circuit voltage(VC) is applied to allow measurement ofvoltage VOUT(VRL) across a load resistor(RL) which is connected in series withthe sensor.

A common power supply circuit canbe used for both VC and VH to fulfill thesensor's electrical requirements. Thevalue of the load resistor (RL) should bechosen to optimize the alarm thresholdvalue, keeping power dissipation (PS)of the semiconductor below a limit of15mW. Power dissipation (PS) will behighest when the value of Rs is equal
to RL on exposure to gas.

GAS2RLVOUT(VRL)

Typical detection range

1~25% LELVH

Circuit voltageVC5.0±0.2V DCPs≤15mW

Load resistanceRLvariable

0.45kΩ min.

Heater resistance

RHapprox 59Ω at room temp.

Heater current

IH

Side view56±5mA

Heater power
consumption

PH

280mW±25mW

Sensor resistanceRS

0.83~8.30kΩ
in 5000ppm methane

Sensitivity(change ratio of Rs)

0.52~0.65
in methaneSide view

Rs (9000ppm)
Rs (3000ppm)

Test gas conditions

Methane in air
at 20±2˚C, 65±5%RH

Circuit conditions

Vc =view
5.0±0.01V DC
Bottom
VH = 5.0±0.05V DC 4

Preheating period
before test

4 days(VC - VRL)2RSAll sensor characteristics shown in this brochurerepresent typical characteristics. Actualcharacteristics vary from sensor to sensor. The
only characteristics warranted are those in theSpecification table above.

φ0.55±0.05

3.6±0.1

φ0.55±0.05

Bottom view
3.6±0.1

190°

3The value of power dissipation (PS) can
be calculated by utilizing the following
formula:φ9.2±0.2
φ8.1±0.2

10.0±1.0

5.0±0.2V DC

φ9.2±0.2
φ8.1±0.2

Heater voltage

12.4±1.0

Methane, Natural Gas

10.0±1.0

Target gases

Top view

2φ5.1

Sensor resistance (Rs) is calculated withu/m : mma measured value of VOUT( VRL) by using
the following formula:		 RS = ( VC - 1) x RL		VRL

Before purchasing this product,
please read the Warranty Statements
shown in our webpage by scanning
this QR code.
https://www.figaro.co.jp/en/pdf/Limited_Warranty_en.pdf

3.6±0.14132

3.6±0.1

MOS type
Top view
TO-5 metal canStandard package

REV: 08/22

190°

TGS2611-E00		 PS =		VC

7.8±0.5

Model number

Standard testconditions

RSRH

Structure and Dimensions:Sensing principle

Electricalcharacteristics
under standard test
conditions

VH( )Specifications:Standard circuit
conditions

34

φ5.1
u/m : mm

Pin connection:
1: Heater
2: Sensor electrode (-)
3: Sensor electrode (+)
4: Heater

FIGARO ENGINEERING INC.
1-5-11 Senba-nishi
Mino, Osaka 562-8505 JAPAN
Phone: (81)-727-28-2045
URL：www.figaro.co.jp/en/