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Gas transmitter - ADOS 592 TOX

The gas transmitter ADOS GTR 210 is suitable for continuous measurement of gases in normal areas and areas where there are risks of explosion.

Available basic versions:

– Ex-version: with current interface 4-20 mA

– Standard: 4-20 mA or LON?-4-wire techniques

– Comfort: 4-20 mA, with additional changeover contacts for alarms and failure

The type test of the explosion-protected gas transmitter, is completed by the KEMA.

ATEX certificate: DEKRA 11ATEX0257 X

IECEx certificate: IECEx DEK 11.0090X


Technical data
TypeTGSVQGOW
Measurement methodSemiconductorHeat reductionThermal conductivity
Measurement range

ppm ranges to 100 % LE

ppm ranges to 100 % LE

rom 0-5 Vol% to 0–100 Vol?%
Percentage error of f.s.d.±5 %±3 %±5 %
Temperature range-25 °C to +55 °C-25 °C to +55 °C-25 °C to +55 °C
Temperature effect3 %2 %3 %
Response time (t90)approx. 55 sapprox. 40 sapprox. 55 s
Pressure effect1 %1 %1 %
Mounting positionoptionaloptionaloptional
Application

Poisonous,combustible and explosive gases in the LEL?region

Poisonous,combustible and explosive gases in the LEL?region

Gases exhibiting substantial differences in thermal conductivity,compared to air

Versions available

industrial (Al),industrial (VA)- and Ex-version

industrial (Al),industrial (VA)- and Ex-versionindustrial (Al),industrial (VA)- and Ex-version
Expected lifetime of the sensorunlimited, 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

Dimensions (W x H x D)

150 x 175 x 105 mm150 x 175 x 105 mm150 x 175 x 105 mm


TypeTOXIRPID
Measurement methodElectro-chemical reactionInfrared

Photo-Ionisation

Measurement range

ppm ranges to 0–100 Vol?%

0-100?% LEL?CH4,?C3H8, C2H2, 0-100 Vol?% CH4 0?–1, 2, 3, 4, 5 Vol?% CO2

0 – 200 ppmto

0 – 2.000 ppm

Percentage error of f.s.d.±3 %±2 %±5?%
Temperature range-25 °C to +55 °C-25 °C to +55 °C-25?°C to +55?°C
Temperature effect2 %2 %3?%
Response time (t90)approx. 60 sapprox. 45 sapprox. 120 s
Pressure effect1 %4 %1 %
Mounting positionoptionaloptionaloptional
ApplicationO2, CO, NH3, NO2, SO2, H2S and othersCH4 (Vol?%; LEL) Propan (LEL), CO2 (Vol?%)e.g. C7H8, C8H10 CHCl3, PH3
Versions available

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

12 months to 5 years depending on the measuring cellapprox. 5 years12 months
Dimensions (WxHxD)

150 x 175 x 105 mm

150 x 200 x 105 mm (O2)

150 x 175 x 105 mm150 x 175 x 105 mm


Technical data – for all 3 basic versions of gas transmitter

TypeGTR 210 Ex-VersionGTR 210 StandardGTR 210 Comfort
Supply voltage24 V DC +10% / -25%24 V DC +10% / -25%

230 V AC, 50 Hz

115 V AC, 60 Hz (optional)

Power consumption4 W4 W10 VA
Interface3-wire techniques with current interface 4 – 20 mA3-wire techniques with current interface 4 – 20 mA or LON?-4-wire techniques1 current output 4–20 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

nonenone
Ex-version

ATEX certificate: DEKRA 11?ATEX?0257 X

IECEx certificate: IECEx?DEK?11.0090?X



Protection classIP 54IP 54IP 54
Weight2,3 kg1,8 kg2,0 kg


Features

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.

TOX sensor

The TOX sensor is 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 flow of current (electro-chemical process).

At a constant air pressure, this current is directly proportional to the oxygen concentration in the sampled air.


TGS sensor

The TGS sensor contains a semiconductor sensor, which is ?constructed on SnO2-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 IR sensor

The test gas flows 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 specific 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.


GOW sensor

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 element is subjected to the test gas. Any change in the concentration 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 PID sensor

The sampled gas flows 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 current generated is a measure of the gas concentration.

Using the PID measuring head, volatile organic compounds (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 (C7H8) and xylene (C8H10) as well as chlorinated hydrocarbons like trichloroethylene (CHCl3). The detection of toxic gases like phosphine (PH3) is also possible.

VQ 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 element, 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.

Application
  • Chemical industry

  • Manufacture of paints and varnishes

  • Plastics processing plants

  • Sewage works

  • Gas-fired boiler systems

  • Liquid gas storage houses

  • Laboratories

  • Oxygen concentration measurements

  • Refineries

  • Cold storage houses (Ammonia monitoring)

  • Paint spraying booths

  • and many more.

Gas transmitter
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