Figaro TGS2610-C00 TGS 2610 Gas Sensor For LP Gases Alcohol, Methane, Propane, Iso-Butane (Ø x H) 9.2 mm x 7.8 mm TGS2610-C00 Data Sheet

2

TECHNICAL INFORMATION FOR TGS2610

TGS2610 is available in two different models which
have different external housings but identical
sensitivity to LP gas. TGS2610-C possesses small size
and quick gas response, making it suitable for gas
leakage checkers, while TGS2610-D uses filter
material in its housing to eliminate the influence of
interference gases such as alcohol, resulting in highly
selective response to LP gas.

1-1   Features

* High selectivity to LP gas
* Low power consumption
* Small size
* Long life and low cost
* Uses simple electrical circuit

1-2   Applications

* Residential LP gas leak detectors
* Recreational vehicle LP gas leak detectors

1-3   Structure
Figure 1 shows the structure of TGS2610.  Using thick
film techniques, the sensing material (SnO

2

) is printed

on electrodes (noble metal) which have been printed
onto an alumina substrate.  One electrode is
connected to pin No.2 and the other is connected to
pin No.3.  The sensor element is heated by RuO

2

material printed onto the reverse side of the substrate
and connected to pins No.1 and No.4.

Lead wires are Pt-W alloy and are connected to sensor
pins which are made of Ni-plated Ni-Fe 50%.

The sensor base is made of Ni-plated steel.  The caps
of both TGS2610-C and TGS2610-D are stainless steel.
The upper opening in both caps is covered with a
double layer of 100 mesh stainless steel gauze
(SUS316). The TGS2610-D utilizes a zeolite filter
inside the cap for reducing the influence of
interference gases.

1-4   Basic measuring circuit

Figure 2 shows the basic measuring circuit.  Circuit
voltage (Vc) is applied across the sensor element which
has a resistance (Rs) between the sensor’s two
electrodes and the load resistor (R

L

) connected in series.

When DC is used for Vc, the polarity shown in Figure
2  must be maintained.  The Vc may be applied
intermittently. The sensor signal (V

RL

) is measured

indirectly as a change in voltage across the R

L

.  The Rs

is obtained from the formula shown at the right.

-

x

Formula to determine Rs

Fig. 1 - Sensor structure

Fig. 2 - Basic measuring circuit

: In the case of V

H

, there is no polarity, so pins 1 and 4 can

be considered interchangable. However, in the case of V

C

, when

used with DC power, pins 2 and 3 must be used as shown in the
Figure above.

Electrodes

Heater

Sensing material

Lead wire

1.5mm

Substrate

1.5mm

(Reverse side)

Lead wire

Stainless steel gauze

Lead pin

Metal cap

TGS2610-C

TGS2610-D