applications : features : tgs 2603 - for detection of odor and air contaminants the fgure below represents typical sensitivity characteristics, all data having been gathered at standard test conditions (see reverse side of this sheet). the y-axis is indicated as sensor resistance ratio (rs/ro) which is defned as follows: rs = sensor resistance in displayed gases at various concentrations ro = sensor resistance in fresh air the fgure below represents typical temperature dependency characteristics. again, the y-axis is indicated as sensor resistance ratio (rs/ro), defned as follows: rs = sensor resistance in fresh air at various temperatures ro = sensor resistance in fresh air at 20c and 65% r.h. * air cleaners * ventilation control * deodorizer control * air quality monitors the sensing element is comprised of a metal oxide semiconductor layer formed on an alumina substrate of a sensing chip together with an integrated heater. in the presence of a detectable gas, the sensor's conductivity increases depending on the 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 tgs 2603 has high sensitivity to low concentrations of odorous gases such as amine-series and sulfurous odors generated from waste materials or spoiled foods such as fsh. by utilizing the change ratio of sensor resistance from the resistance in clean air as the relative response, human perception of air contaminants can be simulated and practical air quality control can be achieved. * low power consumption * high sensitivity to amine-series and sulfurous odor gases * high sensitivity to food odors * long life and low cost * uses simple electrical circuit temperature dependency : sensitivity characteristics : 0.01 0.1 1 10 0.1 1 10 100 rs/ro gas concentration (ppm) air trimethyl amine methyl mercaptan h 2 s hydrogen ethanol 0.1 1 10 -10 0 10 20 30 40 50 rs/ro ambient temperature (?c) 65%rh important note : operating conditions in which figaro sensors are used will vary with each customers specific applications. figaro strongly recommends consulting our technical staff before deploying figaro sensors in your application and, in particular, when customers target gases are not listed herein. figaro cannot assume any responsibility for any use of its sensors in a product or application for which sensor has not been specifically tested by figaro. product information http://www..net/ datasheet pdf - http://www..net/
model number TGS2603 sensing element type 26-series standard package to-5 metal can target gases trimethylamine, h 2 s, etc. typical detection range 1 ~ 10ppm standard circuit conditions heater voltage v h 5.00.2v ac/dc circuit voltage v c 5.00.2v dc ps15mw load resistance r l variable 0.45k min. electrical characteristics under standard test conditions heater resistance r h approx 67 at room temp. (typical) heater current i h 48ma heater power consumption p h 240mw v h =5.0v ac/dc sensor resistance r s 20k ~ 200k in air sensitivity (change ratio of rs) <0.5 rs (10ppm etoh) rs air standard test conditions test gas conditions normal air at 202?c, 655%rh circuit conditions vc = 5.00.2v dc v h = 5.00.2v ac/dc conditioning period before test 96 hours or longer ?9.20.2 7.80.5 10.01.0 3.60.1 1 2 3 sensing element 4 3.60.1 ?8.10.2 ?0.550.05 ?5.1 90? 1.6 1.6 ?0.5 x 6 0.9 0.9 structure and dimensions: basic measuring circuit: rev: 04/13 the sensor requires two voltage inputs: heater voltage (v h ) and circuit voltage (v c ). the heater voltage (v h ) is applied to the integrated heater in order to maintain the sensing element at a specifc temperature which is optimal for sensing. circuit voltage (v c ) is applied to allow measurement of voltage (vout) across a load resistor (r l ) which is connected in series with the sensor. dc voltage is required for the circuit voltage since the sensor has a polarity. a common power supply circuit can be used for both v c and v h to fulfll the sensor's electrical requirements. the value of the load resistor (r l ) should be chosen to optimize the alarm threshold value, keeping power consumption (p s ) of the semiconductor below a limit of 15mw. power consumption (p s ) will be highest when the value of rs is equal to r l on exposure to gas. the value of power consumption (p s ) can be calculated by utilizing the follow - ing formula: p s = sensor resistance (rs) is calculated with a measured value of vout by using the following formula: r s = - r l specifcations: bottom vie top vie side vie v c x r l vout (v c - vout) 2 r s 1: heater 2: sensor electrode (-) 3: sensor electrode (+) 4: heater in the specifcation table above. 1-5-11 senba-nishi mino, osaka 562-8505 japan phone: (81)-72-728-2561 fax: (81)-72-728-0467 www.fgaro.co.jp email: fgaro @fgaro.co.jp product information http://www..net/ datasheet pdf - http://www..net/
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