gastransmitter i n s t r u m e n t a t i o n a n d c o n t r o l a dos gmbh instrumentation and control p.o. box 500 444 52088 a achen frg trierer strasse 23 C 25 52078 a achen frg tel: +49 (0) 2 41 / 97 69 - 0 fax: +49 (0) 2 41 / 97 69 - 16 info@ados.de www.ados.de e s t . 1 9 0 0 gtr 210
gastransmitter gtr 210 ados gmbh instrumentation and control e s t . 1 9 0 0 1 = circuit voltage 2 = heating voltage 3 = load resistor 1 = catalyzer pellistor 2 = electric connections 3 = inert pellistor 4 = diffusion flter the gas transmitter a dos gtr 210 is suitable for continuous measurement of gases in normal areas and areas where there are risks of explosion. by employing 6 different types of sensor, noxious, explosive and non-combustible gases and vapours can be measured. display of the measured gas concentration and the adjustable alarm thresholds, are shown on a multi- colour graphic display. the keyboard input is by way of a touchpad. a current signal is generated that is proportional to the measured concentration of gas, which is transmitted to an evaluation unit placed in a safe area, away from any dangers of explosion. the type test of the explosion-protected gas transmitter, is completed by the kema. kema test certifcate: no.: kema type of protection: ex d e ia mb iic t4 gb application chemical industry manufacture of paints and varnishes plastic processing plants sewage works gas-fred boiler systems liquid gas storage houses laboratories oxygen concentration measurement refneries cold-storage houses (ammonia monitoring) paint spraying booths and many more fields of application the tgs sensor contains a semiconductor sensor, which is constructed on sno 2 -sintered n-substrate. when combustible or reducing gases are absorbed by the surface of the sensor, the concentration of the test gas is determined by the change in conductivity. the tgs sensor the head of the vq sensor functions on the principle of heat reaction. when combustible or reducing gases or vapours come in contact with the measuring ele - ment, they are subjected to catalytic combustion, which causes a rise in temperature; this rise causes a change in the resistance of the measuring element which is used as a measure of the component of gas being tested. the inert element is for compensating the temperature and conduc tivity of the test gas. the vq sensor
gastransmitter gtr 210 ados gmbh instrumentation and control e s t . 1 9 0 0 1 = diffusion flter 2 = test resistor 3 = comparsion resistor 1 = anode 2 = electrolyte 3 = cathode 4 = diffusion path 5 = diffusion flter 6 = test gas 1 = infrared-radiation source 2 = test gas 3 = diffusion flter 4 = infrared-detector 5 = measurement chamber 1 = uv radiating source 2 = test gas 3 = capacitive charge measurement 1 = source de rayonnement uv 2 = ga z mesurer 3 = mesure de charge capacitive (+) 3 1 entre sorti e 2 2 3 (-) 1 = uv radiating source 2 = test gas 3 = capacitive charge measurement (+) 3 1 output 2 2 3 (-) (+) (-) the gow sensor functions on the principle of thermal conductivity. two rhenium-tungsten resistors are used as a measuring element, where the comparison element is subjected to normal ambient air and the measuring ele - ment is subjected to the test gas. any change in the con - centration of gas at the measurement element, causes a change in temperature, which is due to the variation of conductivity. the resultant change in resistance is a direct measure of the gas concentration. the gow sensor the tox sensor i s a measurement system with electro - chemical cell, where the sampled gas is measured by diffusion. in the case of oxygen measurement the oxygen content is in an electrolyte, thus producing a small fow of current (electro-chemical process). at a constant air pressure, this current is directly propor - tional to the oxygen concentration in the sampled air. the tox sensor the test gas fows through a measurement chamber that incorporates an ir radiating source and a two-channel infrared detector. the intensitiy of the infrared radiation is reduced as it passes through the gas molecules.the concentration of the gas can then be calculated by the magnitude of the reduction in intensity. since only absorption of the wavelength specifc to the gas under test in relation to the wavelength not absorbed by a test gas is considered, interference due to dust, ageing etc., is almost compensated. the sampled gas fows through a measurement chamber, that incorporates a uv radiating source and a pair of electrodes with opposing polarity. the gas molecules to be detected are ionized by the uv radiation. the resulting positively charged molecules and the electrons are attracted to the relevant electrode. the cur - rent generated is a measure of the gas concentration. using the pid measuring head, volatile organic com - pounds (voc) can be measured, the ionisation potential of which is less than the energy in the uv radiating source (10,6 ev), e.g. aromatic hydrocarbons like toluol (c 7 h 8 ) and xylene (c 8 h 10 ) as well as chlorinated hydrocar - bons like trichloroethylene (chcl 3 ). the detection of toxic gases like phosphine (ph 3 ) is also possible. the ir sensor the pid sensor the output signal of each sensor is connected to the central unit via a multicore cable for further processing. a ll sensors are plug-in types and thus are easily replaceable.
www.neck-heyn.de ? 09_2011 type gtr 210 ex-version gtr 210 standard gtr 210 comfort supply voltage 24 v dc +10% / -25% 24 v dc +10% / -25% 115 v ac, 60 hz 230 v ac, 50 hz (optional) power consumption: 4 w 4 w 10 va interface 3-wire techniques 4 C 20 ma 3-wire techniques 4 C 20 ma 1 current output 4 C 20 ma 4 potential-free changeover contact for alarm/failure 1 digital input for cancelling alarms type of protection ii 2g ex d e ia mb iic t4 gb kema none none protection class ip 54 ip 54 ip 54 weight 5.95 lbs 5.95 lbs 5.95 lbs technical data C gas transmitter type measurement method tgs semiconductor vq heat reduction gow thermal conductivity tox electro-chemical reaction ir infrared pid photo-ionisation measurement range ppm ranges to 100 % lel ppm ranges to 100 % lel from 0C5 vol % to 0C100 vol % ppm ranges to 0C100 vol % 0-100 % lel ch 4 , c 3 h 8 , c 2 h 2 0-100 vol % ch 4 0 C1, 2, 3, 4, 5 vol % co 2 0 C 200 ppm to 0 C 2.000 ppm percentage error of f.s.d. 5 % 5 % 5 % 3 % 3 % 5 % temperature range -13 f to +131 f -13 f to +131 f -13 f to +131 f -13 f to +131 f -13 f to +131 f -13 f to +131 f temperature effect 5 % 2 % 2 % 2 % 2 % 2 % response time (t 90 ) approx. 20 s approx. 20 s approx. 40 s < 60 s < 30 s approx. 60 s pressure effect 1 % 1 % 1 % 1 % 1 % 1 % mounting position optional optional optional optional optional optional application poisonous, combus - tible and explosive gases in the lel region poisonous, combus - tible and explosive gases in the lel region gases exhibiting sub - stantial differences in thermal conductivity, compared to air o 2 , co, nh 3 , no 2 , so 2 , h 2 s and others ch 4 (vol %; lel) propan (lel) co 2 (vol %) e.g. c 7 h 8 , c 8 h 10 chcl 3 , ph 3 versions available industrial (al), industrial (va)- and ex-version industrial (al), industrial (va)- and ex-version industrial (al), industrial (va)- and ex-version industrial (al), industrial (va)- and ex-version industrial (al), industrial (va)- and ex-version industrial (al), industrial (va)- and ex-version expected lifetime of the sensor unlimited, when used for gases not causing catalytic poisoning unlimited, when used for gases not causing catalytic poisoning unlimited, when used with gases that do not attack aluminium, rhenium- tungsten or gold 12 months to 5 years depending on the measuring cell approx. 5 years 12 months dimensions (w x h x d) 5.9 x 6.89 x 4.13 inch 5.9 x 6.89 x 4.13 inch 5.9 x 6.89 x 4.13 inch 5.9 x 6.89 x 4.13 inch 5.9 x 7.87 x 4.13 inch (o 2 ) 5.9 x 6.89 x 4.13 inch 5.9 x 6.89 x 4.13 inch technical data C gas sensors e s t . 1 9 0 0 gastransmitter gtr 210 ados gmbh instrumentation and control
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