GD-Transmitter S, equipped with a electrochemical cell, is suited for application in hazardous areas of Zone 2.
The device‘s got a standard 4-20 mA signal output as well as a RS-485 bus interface which brings a lot of advantages along in combination with control units because it allows a favourably priced ring bus installation.
Moreover the transmitter offers the possibility of an automatic single-man-calibration as well as further comfortable functions for configuration and monitoring of the sensor functionality.
This series is especially suitable in case of renovation of existing systems where wiring expenditure should be avoided or coupling to conventional process management systems is required.
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Measuring component
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Formula
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Lower Explosion Limit (LEL)
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Measuring range
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Methane
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CH4
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5,0 Vol %
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0 ~ 100% LEL
0-100 Vol%
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Chlorine
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Cl2
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-
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0 - 10 PPM
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Hydrogen sulphide
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H2S
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4,3 Vol %
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0 - 3000 PPM
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IPA
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C3H8O
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1,2 Vol %
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0 ~ 100% LEL
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Refrigerant (contains H2)
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depends on gas
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depends on gas
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0 - 1 Vol%
0 - 10 Vol%
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Carbon monoxide
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CO
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12,5 Vol %
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0 - 300 PPM
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Carbon dioxide
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CO2
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-
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0-5000 PPM /
0-5 Vol% / 0- 100 Vol%
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Ammonia
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NH3
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3 Vol%
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0 - 1000 PPM
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Ozone
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O3
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-
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0 - 1 PPM
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Nitrogen dioxide
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NO2
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-
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0 - 20 PPM
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Silane
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SiH4
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-
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0 - 50 PPM
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Phosphine
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PH3
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-
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0 - 20 PPM
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Ethylene oxide
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C2H4O
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3 Vol %
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0 - 100 PPM
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Please request information for further gases.
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Model
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GD-T_SIR
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GD-T_SHW
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GD-T_SHL
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GD-T_SEC
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Measuring gas
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Combustible gases, toxic gases (ask for details)
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Toxic gases
(ask for details), O2
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Measuring range
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PPM, LEL, Vol%
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PPM, Vol%
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Detection principle
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IR-Absorption
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Catalytic combustion
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Semiconductor
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Electrochemical cell
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Response time
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depending on gas (T90)
< 5s at 0,5l/min gas flow
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15 bis 60s, depending on gas (T90)
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30 bis 60s, depending on gas (T90)
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20 bis 60s, depending on gas (T90)
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Operating temperature and humidity*
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-25°C to +55°C *
0% to 95% RH
(non-condensing)
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-25°C to +55°C *
5% to 95% RH
(non-condensing)
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-20°C to +50°C *
10% to 90% RH
(non-condensing)
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-25°C to +55°C *
10% to 90% RH
(non-condensing)
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Pressure
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800 hPa to 1100 hPa
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900 hPa to 1100 hPa
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900 hPa to 1100 hPa
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Enclosure rating
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IP 54 (excepting gas inlet)
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Output signal
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4-20 mA (linear), RS 485 (optional)
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Material
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Cast aluminium (lacquered) / stainless steel
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Installation
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Wall mounting, installation in pipes with adaptor (optional)
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Power source
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24 ± 6 V DC
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Max. load
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500 Ω
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Cable gland
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M 16 x 1,5
(diameter of cable 5 - 9 mm)
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Power consumption
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80 mA / 2 W
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40 mA / 1 W
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Protection*
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-
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EEx nA IIC T6 X
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Measuring function
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Designed according to DIN EN 61779-1 and DIN EN 61779-4
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Designed according to DIN EN 45544-1 to DIN EN 45544-3 (or EN50104)*
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EC-Directives
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 , 89/336/EWG (EMV)
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 II 3G (suitable for Zone 2)
94/9/EC (ATEX), 89/336/EEC (EMC)
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Dimensions and weight
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approx. 138 x 105 x 65 mm (O2 detector: approx. 188 x 105 x 65 mm)
approx. 0,5 kg
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* depending on gas: please request details; specifications subject to change without notice.
