TGS2602 - For The Detection of Air Contaminants

TGS2602 - for the detection of Air Contaminants

Features
* High sensitivity to VOCs and odorous gases
* Low power consumption
* High sensitivity to gaseous air contaminants
* Long life
* Uses simple electrical circuit
* Small size

Applications
* Air cleaners
* Ventilation control
* Air quality monitors
* VOC monitors
* Odor monitors

The sensing element is comprised of a metal oxide semiconductor layer formed on the alumina substrate of a sensing chip together with an integrated heater. In the presence of detectable gas, sensor conductivity increases depending on gas concentration in the air. A simple electrical circuit can convert the change in conductivity to an output signal which corresponds to the gas concentration.

The TGS2602 has high sensitivity to low concentrations of odorous gases such as ammonia and H2S generated from waste materials in office and home environments. The sensor also has high sensitivity to low concentrations of VOCs such as toluene emitted from wood finishing and construction products.

Due to miniaturization of the sensing chip, TGS2602 requires a heater current of only 56mA and the device is housed in a standard TO-5 package.

Specification

Model number	TGS2602-B00
Sensing principle	MOS type
Standard package	TO-5 metal can
Target gases	Air contaminants (VOCs, ammonia, H 2 S, etc.)
Typical detection range	1 ~ 30ppm of EtOH
Standard circuit conditions	Heater voltage	VH	5.0±0.2V AC/DC
Circuit voltage	VC	5.0±0.2V DC	Ps≤15mW
Load resistance	RL	variable	0.45kΩ min.
Electrical characteristics under standard test conditions	Heater resistance	RH	approx 59Ω at room temp. (typical)
Heater current	IH	56±5mA
Heater power consumption	PH	280mW (typical)
Sensor resistance	RS	10kΩ ~ 100kΩ in air
Sensitivity (change ratio of Rs)	0.08~0.5	Rs (10ppm of EtOH)/Rs air
Standard test conditions	Test gas conditions	normal air at 20±2˚C, 65±5%RH
Circuit conditions	Vc = 5.0±0.01V DC V H = 5.0±0.05V DC
Conditioning period before test	7 days