Figaro TGS2600-B00 TGS 2600 Gas Sensor For Air Quality Various gases, air pollution (Ø x H) 9.2 mm x 7.8 mm TGS2600-B00 Data Sheet

2

TECHNICAL INFORMATION FOR TGS2600

1-1   Features

* High selectivity to low gas concentrations
* Low power consumption
* Small size
* Long life

1-2   Applications

* Air cleaners for indoor air cleaners
* Air cleaners for vehicles
* Air quality monitors

1-3   Structure

Figure 1 shows the structure of TGS2600.  Using thick
film techniques, the sensor material is printed on
electrodes (noble metal) which have been printed
onto an alumina substrate.  The main sensing material
of the sensor element is tin dioxide (SnO

2

).  One

electrode is connected to pin No.2 and the other is
connected to pin No.3.  An RuO

2

 heater printed onto

the reverse side of the substrate and connected to pins
No.1 and No.4 heats the sensing material.

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

The sensor base is made of Ni-plated steel.  The sensor
cap is made of stainless steel and contains 6 pin holes
on the sensor’s top.

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.  DC voltage is always required for the circuit
voltage, and the polarity shown in Fig. 2 must be
maintained.  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.

-

Rs =                     x R

Formula to determine Rs

Fig. 1 - Sensor structure

Electrodes

Heater

Sensing material

Lead wire

1.5mm

Substrate

1.5mm

(Reverse side)

Lead wire

Pin holes

Lead pin

Metal

cap

Sensor element

Fig. 2 - Basic measuring circuit

: In the case of V

H

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

be considered interchangeable. 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.