PRODUCT INFORMATIONTGS5042 - for the detection of Carbon Monoxide
Features:Applications:* Battery operable* High repeatability/selectivity to CO* Linear relationship between CO gas
concentration and sensor output* Simple calibration* Long life
* UL recognized component* Meets UL2034, EN50291, and RoHS
requirements* Residential and commercial CO detectors* CO monitors for industrial applications* Ventilation control for indoor parking garages* Fire detection* Safety measures for lithium-ion batteries

Figaro’s TGS5042 is a battery operable electrochemical sensor which offers several
advantages over traditional electrochemical sensors. Its electrolyte is environmentallyfriendly, it poses no risk of electrolyte leakage, can detect concentrations as highas 1% CO, operates in a range from -5˚ and +55˚C, and it has lower sensitivity tointerferant gases. With a long life, good long term stability, and high accuracy, thissensor is the ideal choice for CO detectors with digital display. OEM customers willfind individual sensors data printed on each sensor in bar code from, enabling users
to skip the costly gas calibration process and allowing for individual sensor tracking.
TGS5042 utilizes a standard AA battery-sized package.
The figure below represents typical sensitivity characteristics,
all data having been gathered at standard test conditions (seereverse side of this sheet). The Y-axis shows theoutput currentof the sensor (Iout/µA) in each gas. Output current is linear
to CO concentration, with a deviation of less than ±5% in therange of 0~1000ppm.

The figure below represents typical temperature dependency
characteristics. The Y-axis shows the sensor output ratio (I/Io)
as defined below. The linear relationship between I/Io and CO
concentration is constant regardless of the CO concentration
range.
I = Sensor output current in 400ppm of CO at various			temperatures
Io = Sensor output current in 400ppm at 20˚C/50%RH

Sensitivity Characteristics:

Temperature Dependency:
2.0

2.0

1.5

1.5
CO
H2Ethanol
CH4
Iso-butane

1.0
Iout(µA)
0.5

1.0
I/Io

0.5

0.0-0.50.00200

400600Gas concentration (ppm)

800

1000-100102030405060Temperature (˚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:

C1

The diagram at the right shows the basic measuring circuit ofTGS5042. The sensor generates a minute electric current which isconverted into sensor output voltage (Vout) by an op-amp/resistor(R1) combination.

R1

Figaro recommends the following electrical parts:
R1 : 1MΩC1 : 1µF
IC : AD708

1µF

1MΩ

-Working

NOTE: When voltage is applied to the sensor output terminal, thesensor may be damaged. Voltage applied to the sensor should bestrictly limited to less than ±10mV. An additional resistor or FET isrequired to prevent polarization of the sensor when Vc is off.

+ICTGS5042

VoutCounter

Basic measuring circuit of TGS5042

Specifications:

Structure and Dimensions:Target gases

Carbon monoxide

Typical detection range

0 ~ 10,000ppm

Output current in CO

1.2~2.4nA/ppm

20.9±0.05

Top view

4.15±0.8

8.3±0.05

TGS5042-A00

4.0±0.1

Baseline offset(*1)<±10ppm equivalent

Operating & storage
temperature (*2,*3)-5˚C ~ +55˚C

90±4˚Working electrodeø8.5±0.3

Operating humidity

5 ~ 99%RH (no condensation)

Response time (T90)within 60 seconds

Recommended storage
temperature

0˚C ~ +35˚C

Insulation tube

Weightapprox. 12g

Standard test conditions

20±2˚C, 40±10%RH

Side view

49.7±1.0

Model number

0.8±0.05

Specification

50.2±1.5

Itemø14.1±0.6(*1) Represents sensor output in air under operating conditions(*2) If the water in the reservoir should freeze very rapidly (typicallyoccurs only under artificially created conditions), irreversible change
to sensor characteristics would occur. To avoid this risk, the sensor isrecommended to be positioned with its cap (working electrode) facing

20.9±0.05
4.15±0.8

Counter electrode

Bottom view

4.0±0.1

0.8±0.05

temperature range would exceed the specified limits.

7.5±0.1(*3) Please contact Figaro for more information if the required

8.3±0.05

0.8±0.05

up.

90±4˚

unit: mm

NOTE 1: Sensors are shipped in an open-circuit condition, so stabilization time of one hour(typical) is recommended (please refer to Technical Information for TGS5042 for furtherinformation).

All 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

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

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