Top View

Side View

Bottom View

Pin connection:

1:Common(-)

2:Sensor electrode (+)

3:Heater(+)

0.8 ± 0.1

unit:mm

0.25 ± 0.05

2.54

± 0.2

1

2

3

ø9.2 ± 0.2

ø8.1 ± 0.2

Structure and Dimensions:

Basic Measuring Circuit:

REV: 11/17

The sensor requires two voltage

pins: Pin #3--heater (+), Pin #2--sensor

electrode (+), and Pin #1--common (-).

To maintain the sensing element at

specific temperatures which are optimal

for sensing two different gases, heater

voltagesof0.9Vand0.2Varealternately

applied between pins #1 and #3 during

a 20 second heating cycle.

both ends of the sensor (Rs) and a load

series,toallowmeasurementofvoltage

Circuit voltage (Vc) should be applied

only at the moment when the signal is

taken from the sensor.

Pleaserefertothedocument"Technical

Information for TGS3870-B00" for

details regarding the timing and

Specifications:

Bottom view

Top view

Side view

be calculated by utilizing the following

formula:

Sensor resistance (Rs) is calculated with

following formula:

All sensor characteristics shown in this brochure represent typical characteristics.Actual

characteristics vary from sensor to sensor. The only characteristics warranted are those

in the Specification table above.

Sensor

(+)

(-)

(+)

(-)

1

3

2

Basic measuring circuit

Caution: Do not apply a constant circuit

voltage (5.0V) or the sensor would not

exhibit its specified characteristics.

Model number

TGS3870-B00

Sensing principle

MOS type

Standard package

Plastic base and metal can

Target gases

Methane and Carbon Monoxide

Typical detection range

Methane 1~25% LEL

Carbon monoxide 50~1,000ppm

Standard circuit

conditions

Heater voltage

Circuit voltage

5.0±0.2V DC pulse

(refer to Technical Information for TGS3870-B00)

Load resistance

variable (>0.75kΩ)

Electrical

characteristics

under standard test

conditions

Heater resistance

3Ω±0.3Ω at room temp.

Heater power

consumption

120mW

11mW

38mW

average

Sensor resistance

0.35kΩ~3.5kΩ in 3000ppm methane

1.8kΩ~24kΩ in 150ppm CO

Sensitivity

(change ratio of Rs)

β

0.50~0.65

0.1~0.6

Rs (300ppm CO)

Rs (150ppm CO)

Standard test

conditions

Test gas conditions

Target gas in air

at 20±2˚C, 65±5%RH

Circuit conditions

Vc = 5.0±0.02V DC pulse

(refer to Technical Information for TGS3870-B00)

Conditioning period

before test

≥5 days

FIGARO ENGINEERING INC.

1-5-11 Senba-nishi

Mino, Osaka 562-8505 JAPAN

Tel: 81-72-728-2567

Fax: 81-72-728-0467

email: figaro@figaro.co.jp

www.figaro.co.jp