PRODUCT INFORMATIONTGS 2616-C00 - for the detection of Hydrogen
Features:* High selectivity to hydrogen* Small size and low power consumption* Uses simple electrical circuit

Applications:* Hydrogen detection for steel plant safety* Portable gas detectors* Leak detection for gas appliances* Hydrogen leak detectors for fuel cells* Safety measures for lithium-ion batteries

The sensing element is comprised of a metal oxide semiconductor layer formedon an alumina substrate of a sensing chip together with an integrated heater,
and it is housed in a standard TO-5 package. In the presence of a detectablegas, the sensor's conductivity increases
depending on the gas concentration in the air. A simple electrical circuit canconvert the change in conductivity to an output signal which corresponds to
the gas concentration.
TGS2616-C00 has a newly developed sensing element which reduces theinfluence of interference gases such as alcohol, resulting in highly selective
response to hydrogen.

The figure on the right represents typical sensitivity characteristics
that are measured at standard test conditions. (see reverse
side of this sheet for more details) The Y-axis indicates sensor
resistance ratio Rs/Ro, where Rs and Ro are defined as below:
Rs = Sensor resistance in various gases and concentrations
Ro = Sensor resistance in 100 ppm of hydrogen

100
AirHydrogen
Ethanol

10Rs/R0(H2:100ppm)

Sensitivity Characteristics:

10.1

10100

1000

10000

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 of
15mW. Power dissipation (PS) will behighest when the value of Rs is equal
to RL on exposure to gas.

34VH

VC

RL

Sensing principle

MOS typeStandard package

TO-5 metal canTarget gases

Hydrogen

Typical detection range

30～3000ppm
VH

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

PHSensor resistanceRS

Top view

Top view

Side view

Side view

VH = 5.0V DC
10.0±1.00.30kΩ ~ 30kΩin 100ppm hydrogenRs (1000ppm)
Rs (100ppm)

Hydrogen in air
at 20±2˚C, 65±5%RH

Circuit conditions

Vc = 5.0±0.01V DC
VH = 5.0±0.05V DC

Preheating period
before test

2 days

φ0.55±0.05
3.6±0.1

Bottom view

4The value of power dissipation (PS) can
be calculated by utilizing the following
formula:(VC - VRL)2RSSensor resistance (Rs) is calculated witha measured value of VOUT( VRL) by using
the following formula:		V
RS = ( 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.

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 view1
3.6±0.1

Test gas conditions

90°

0.25~0.60
in hydrogen

2

φ5.1

u/m:mmu/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/34
90°

280mW

φφ

φ9.2±0.2
φ8.1±0.2

5.0±0.2V DC

3REV: 01/24(VRL)

7.8±0.5

Heater voltage

Sensitivity(change ratio of Rs)		 PS =		VOUT

Structure and Dimensions:
TGS2616-C00

Standard test
conditions

GAS( )

Model number

Electricalcharacteristics
under standard test
conditions

12

Specifications:Standard circuit
conditions

RSRH

3