Datasheet

Revised 08/04

TECHNICAL INFORMATION FOR TGS2600

2. Basic Sensitivity Characteristics

2-1 Sensitivity to various gases

Figure 4 shows the relative sensitivity of TGS2600 to

various gases. The Y-axis shows the ratio of the

sensor resistance in various gases (Rs) to the sensor

resistance in clean air (Ro) taken at standard test

conditions of 20˚C/65%RH.

Figure 5 shows the relative sensitivity of TGS2600 to

various gases in cigarette smoke. The Y-axis shows

the ratio of the sensor resistance in cigarette smoke

(Rs) to the sensor resistance in clean air (Ro) taken at

standard test conditions of 20˚C/65%RH. This data

was taken in a 20m

room with cigarettes placed on

a flat surface. The burning time for one cigarette was

approximately 8 minutes. (Note: Generally, the

activation point for an air cleaner would be around Rs/

Ro=0.85, while the Rs/Ro for just one cigarette is as low

as 0.65, making this sensor ideal for air cleaner application).

This data shows that TGS2600 has good sensitivity

to low concentrations of air contaminants, including

those found in cigarette smoke.

NOTE:

All sensor characteristics in this technical brochure

represent typical sensor characteristics.

Fig. 4 - Sensitivity to various gases (Rs/Ro)

Fig. 5 - Sensitivity to cigarette smoke (Rs/Ro)

0.01

0.1

1 10 100

Rs/Ro

Gas concentration (ppm)

Air

Methane

Iso-butane

Hydrogen

Ethanol

0.1

1.0

012345

Rs/Ro

Number of cigarettes

0.5