PRODUCT INFORMATIONTGS 2611-C00 - for the detection of Methane
Features:

Applications:* Quick response* Low power consumption* Long life and low cost
* Uses simple electrical circuit* Portable gas detectors* Gas leak detector for gas appliances

TGS2611-C00 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-C00 requires a heater current of
only 56mA and the device is housed in a standard TO-5 package.
TGS2611-C00 possesses small size and quick gas response, making it suitablefor gas leakage checkers.
The TGS2611-C00 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(see reverse 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

The figure below represents the typical response pattern when
the sensor is inserted into and later removed from 5000ppmof methane.

Sensitivity Characteristics:

Gas Response to Methane:

1001001010AirRs/RoRs(kΩ)

1EthanolHydrogenIso-butane

10.1

methane5000ppm/air

air

012air

3456Time (min.)Methane

0.1
100

1000

10000100000

Gas concentration (ppm)
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 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 isoptimal 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. The
value 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 equalto RL on exposure to gas.

Sensing principle

MOS typeStandard package

TO-5 metal canTarget gases

Methane, Natural Gas

Typical detection range

1~25% LELGAS2VOUT

RL(VRL)

Circuit voltage

VC

5.0±0.2V DC

Ps≤15mW

Load resistanceRL

variable

0.45kΩ min.

Heater resistance

RH

approx 59Ω at room temp.

Heater current

IH

56±5mA

Heater power
consumption

PH

280mW±25mW

Sensor resistanceRS

0.68~6.8kΩ
in 5000ppm methaneTop view

5.0±0.2V DC

Side view

Side view

Side view

Rs (9000ppm)
Rs (3000ppm)

Circuit conditionsVc = 5.0±0.01V DC
VH = 5.0±0.05V DC

Preheating period
before test

7 days

φ0.55±0.05
3.6±0.1
Bottomview
Bottomview

4The value of power dissipation (PS) canbe calculated by utilizing the following
formula:Sensor resistance (Rs) is calculated witha measured value of VOUT( VRL) by using
the following formula:		VRS = ( C - 1) x RL		VRL

All sensor characteristics shown in this brochurerepresent typical characteristics. Actual
characteristics vary from sensor to sensor. The
only characteristics warranted are those in theSpecification table above.

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

Bottom view

190°

Methane in air
at 20±2˚C, 65±5%RH

φφ

φ9.2±0.2
φ8.1±0.2

3.6±0.1

0.54~0.66
in methane

Test gas conditions

2		(VC - VRL)
PS =		RSTop view

7.8±0.5

VH

Top view

10.0±1.0

Heater voltage

Sensitivity(change ratio of Rs)

REV: 04/22132

φ5.1

34u/m:mmu/m : mmPin 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/

90°

TGS2611-C00

Standard test
conditions

VC

RS

RH

Structure and Dimensions:

Model number

Electricalcharacteristics
under standard test
conditions

VH

( )

Specifications:Standard circuit
conditions

343