Name: GDS GDS-58DXP-0-71-06-15-04/0-0 SAMPLE DRAW LEL CATALYTIC BEAD AND HYDROGEN SULFIDE
Brand: GDS
SKU: 3347

DESCRIPTION
FEATURES
SPECIFICATIONS
LITERATURE

GDS GDS-58DXP Dual Channel Sample Draw Monitor with local stainless steel sensor head configured for Catalytic Bead sensor for Combustibles LEL (specify gas) with range 0-100% LEL (Lower Explosive Limit) and Hydrogen Sulfide (H2S). Brushless DC sample pump, Fault and Low Flow Warning. 24VDC. Includes high resolution LCD Display, two 4-20mA outputs and MODBUS serial slave port. Optional relays output. CSA and UL Approved for Hazardous Locations. Class I Div 1. Available calibrated to Methane (Natural Gas), Ethane, Ethylene, Hydrogen, Butane, Pentane, IPA, Methanol, MEK, Propane, Propylene, Pentane and many others.

GDS-58DXP-0-71-06-15-04/0-0 Spell
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Inlet Filter

Gas Range

Local Relay Option

Mounting Options

Enclosure Options

Tag

Calibration 0-100% LEL

Enclosure heater

Duct mount probe

[ 3 Weeks ]

251 Variants of base SKU / 30 Shown below

The GDS-58DXP sample draw gas monitor is an ideal solution for ambient gas detection applications where the monitored location is unsuitable for the direct installation of a fixed gas detector due to enviromental, access or other reasons. The GDS-58DXP sample draw monitor is designed to detect a wide range of toxic and combustible gases in potentially hazardous environments. The monitor operates on +24VDCvolts DC and includes an optional 110/220VAC power supply. Outputs include dual industry standard 4-20mA analog signals as well as a MODBUS port. Optional alarm relays allow the GASMAX DSX to communicate with a wide range of industry devices and system controllers.

Wide Variety of Available Sensors

The GASMAX DSX supports both local and remote electrochemical and infrared combustible sensors. Several electrochemical sensors, including hydrogen sulfide are available in low, medium and high ranges.

Non-Intrusive User Interface

The GDS-58DXPfeatures non-intrusive magnetic switches that allow complete system configuration, regular calibration and product maintenance to be performed in the field without compromising the explosion-proof rating. The display screen always shows the current calibrated level of gas present at the sensor.

Flexible Output Options

In addition to dual industry-standard 4-20mA current loop outputs, a built-in isolated RS-485 two-wire MODBUS� interface is available to communicate with controllers, PLCs or large DCS system. A special Modbus Wiring Junction Box option makes it possible to easily create the daisy chain wiring for power and Modbus signal.

Certifications

The GDS58-DXP is built around the CSA certified GASMAX DSX gas monitor and is designed for use in hazardous areas using CSA and UL certified flame arrestors, seals and enclosures.

Applications

The GDS58-DXP is ideal for power plants, refineries, tank farms, chemical plants, compressor stations, pipelines and other industrial installations where fixed gas detection is required for user safety and equipment protection. Please contact GDS Corp to discuss application details or to obtain a quote for monitors or complete gas detection systems.

FEATURES

Certified for use in Class I Div I hazardous locations
Monitor toxic gases, oxygen levels or hydrocarbon combustibles
Graphic display shows reading, alarm and fault conditions
Sanple draw distance demonstrated up to 500� using 1/4� OD tubing
Non-intrusive user interface for calibration in hazardous areas
Power-up and post-calibration delays eliminate false alarms
Low flow warning flashes red and drops 4-20mA output to 0 mA
Flow meter for visual confirmation of sample gas flow
Requires +24VDC +/- 10% at less than 20 watts (dual GDS-IR)
Two alarm relays support local strobe or warning horn
MODBUS interface for remote digital monitoring via DCS or PLC
Setup in hazardous area requires only simple magnetic wand
Manufactured in USA

GDS-58DXP SPECIFICATIONS
Power Input:	+24VDC nominal < 10 watts with toxic sensor < 15 watts with GDS-IR infrared sensor < 20 watts with dual GDS-IR infrared sensor
Display	High resolution graphical LCD transflective (sunlight readable) screen with white LED backlight
User Interface	Three magnetic switches for non-intrusive setup and calibration in hazardous areas
Sensor Input	Dual channel toxic gas or infrared combustible / CO2 sensors
Alarm Settings	Two user-adjustable alarm settings
Draw Distance	Demonstrated up to 500 feet using 1/4� OD flexible tubing
Standard Output	Dual industry-standard 4-20mA outputs; max 1000 ohm loop load
Optional Relay Output	Four alarm / fault relays configurable for alarm set points; latching and non-latching mode; multi-sensor array logic
Digital Output	Single isolated two-wire MODBUS serial slave port.
Temp	Electronics -40�C to +40�C; Limits may vary depending on sensor Relative humidity 0-99% non-condensing
Housing	Aluminum instrument housing, 303 Stainless Steel sensor housing
Dimensions	WxHxD 15� x 10.5� x 5� with toxic sensor WxHxD 15� x 20� x 5� with GDS-IR sensor
Certifications	GASMAX DSX CSA: Class I Div 1 Groups B, C, D; T5 Flame arrestors UL and CSA certified for Class I Div 1 areas
Warranty	Two-year limited warranty on hardware; one year on sensors.

Gases

GAS OR VAPOR	Ionization Potential(eV)
A
2-Amino pyridine	8
Acetaldehyde	10.21
Acetamide	9.77
Acetic acid	10.69
Acetic anhydride	10
Acetone	9.69
Acetonitrile	12.2
Acetophenone	9.27
Acetyl bromide	10.55
Acetyl chloride	11.02
Acetylene	11.41
Acrolein	10.1
Acrylamide	9.5
Acrylonitrile	10.91
Allyl alcohol	9.67
Allyl chloride	9.9
Ammonia	10.2
Aniline	7.7
Anisidine	7.44
Anisole	8.22
Arsine	9.89
B
1,3-Butadiene (butadiene)	9.07
1-Bromo-2-chloroethane	10.63
1-Bromo-2-methylpropane	10.09
1-Bromo-4-fluorobenzene	8.99
1-Bromobutane	10.13
1-Bromopentane	10.1
1-Bromopropane	10.18
1-Bromopropene	9.3
1-Butanethiol	9.14
1-Butene	9.58
1-Butyne	10.18
2,3-Butadione	9.23
2-Bromo-2-methylpropane	9.89
2-Bromobutane	9.98
2-Bromopropane	10.08
2-Bromothiophene	8.63
2-Butanone (MEK)	9.54
3-Bromopropene	9.7
3-Butene nitrile	10.39
Benzaldehyde	9.53
Benzene	9.25
Benzenethiol	8.33
Benzonitrile	9.71
Benzotrifluoride	9.68
Biphenyl	8.27
Boron oxide	13.5
Boron trifluoride	15.56
Bromine	10.54
Bromobenzene	8.98
Bromochloromethane	10.77
Bromoform	10.48
Butane	10.63
Butyl mercaptan	9.15
cis-2-Butene	9.13
m-Bromotoluene	8.81
n-Butyl acetate	10.01
n-Butyl alcohol	10.04
n-Butyl amine	8.71
n-Butyl benzene	8.69
n-Butyl formate	10.5
n-Butyraldehyde	9.86
n-Butyric acid	10.16
n-Butyronitrile	11.67
o-Bromotoluene	8.79
p-Bromotoluene	8.67
p-tert-Butyltoluene	8.28
s-Butyl amine	8.7
s-Butyl benzene	8.68
sec-Butyl acetate	9.91
t-Butyl amine	8.64
t-Butyl benzene	8.68
trans-2-Butene	9.13
C
1-Chloro-2-methylpropane	10.66
1-Chloro-3-fluorobenzene	9.21
1-Chlorobutane	10.67
1-Chloropropane	10.82
2-Chloro-2-methylpropane	10.61
2-Chlorobutane	10.65
2-Chloropropane	10.78
2-Chlorothiophene	8.68
3-Chloropropene	10.04
Camphor	8.76
Carbon dioxide	13.79
Carbon disulfide	10.07
Carbon monoxide	14.01
Carbon tetrachloride	11.47
Chlorine	11.48
Chlorine dioxide	10.36
Chlorine trifluoride	12.65
Chloroacetaldehyde	10.61
� -Chloroacetophenone	9.44
Chlorobenzene	9.07
Chlorobromomethane	10.77
Chlorofluoromethane (Freon 22)	12.45
Chloroform	11.37
Chlorotrifluoromethane (Freon 13)	12.91
Chrysene	7.59
Cresol	8.14
Crotonaldehyde	9.73
Cumene (isopropyl benzene)	8.75
Cyanogen	13.8
Cyclohexane	9.8
Cyclohexanol	9.75
Cyclohexanone	9.14
Cyclohexene	8.95
Cyclo-octatetraene	7.99
Cyclopentadiene	8.56
Cyclopentane	10.53
Cyclopentanone	9.26
Cyclopentene	9.01
Cyclopropane	10.06
m-Chlorotoluene	8.83
o-Chlorotoluene	8.83
p-Chlorotoluene	8.7
D
1,1-Dibromoethane	10.19
1,1-Dichloroethane	11.12
1,1-Dimethoxyethane	9.65
1,1-Dimethylhydrazine	7.28
1,2-Dibromoethene	9.45
1,2-Dichloro-1,1,2,2- tetrafluoroethane (Freon 114)	12.2
1,2-Dichloroethane	11.12
1,2-Dichloropropane	10.87
1,3-Dibromopropane	10.07
1,3-Dichloropropane	10.85
2,2-Dimethyl butane	10.06
2,2-Dimethyl propane	10.35
2,3-Dichloropropene	9.82
2,3-Dimethyl butane	10.02
3,3-Dimethyl butanone	9.17
cis-Dichloroethene	9.65
Decaborane	9.88
Diazomethane	9
Diborane	12
Dibromochloromethane	10.59
Dibromodifluoromethane	11.07
Dibromomethane	10.49
Dibutylamine	7.69
Dichlorodifluoromethane (Freon 12)	12.31
Dichlorofluoromethane	12.39
Dichloromethane	11.35
Diethoxymethane	9.7
Diethyl amine	8.01
Diethyl ether	9.53
Diethyl ketone	9.32
Diethyl sulfide	8.43
Diethyl sulfite	9.68
Difluorodibromomethane	11.07
Dihydropyran	8.34
Diiodomethane	9.34
Diisopropylamine	7.73
Dimethoxymethane (methylal)	10
Dimethyl amine	8.24
Dimethyl ether	10
Dimethyl sulfide	8.69
Dimethylaniline	7.13
Dimethylformamide	9.18
Dimethylphthalate	9.64
Dinitrobenzene	10.71
Dioxane	9.19
Diphenyl	7.95
Dipropyl amine	7.84
Dipropyl sulfide	8.3
Durene	8.03
m-Dichlorobenzene	9.12
N,N-Diethyl acetamide	8.6
N,N-Diethyl formamide	8.89
N,N-Dimethyl acetamide	8.81
N,N-Dimethyl formamide	9.12
o-Dichlorobenzene	9.06
p-Dichlorobenzene	8.95
p-Dioxane	9.13
trans-Dichloroethene	9.66
E
Epichlorohydrin	10.2
Ethane	11.65
Ethanethiol (ethyl mercaptan)	9.29
Ethanolamine	8.96
Ethene	10.52
Ethyl acetate	10.11
Ethyl alcohol	10.48
Ethyl amine	8.86
Ethyl benzene	8.76
Ethyl bromide	10.29
Ethyl chloride (chloroethane)	10.98
Ethyl disulfide	8.27
Ethylene	10.5
Ethyl ether	9.51
Ethyl formate	10.61
Ethyl iodide	9.33
Ethyl isothiocyanate	9.14
Ethyl mercaptan	9.29
Ethyl methyl sulfide	8.55
Ethyl nitrate	11.22
Ethyl propionate	10
Ethyl thiocyanate	9.89
Ethylene chlorohydrin	10.52
Ethylene diamine	8.6
Ethylene dibromide	10.37
Ethylene dichloride	11.05
Ethylene oxide	10.57
Ethylenelmine	9.2
Ethynylbenzene	8.82
F
2-Furaldehyde	9.21
Fluorine	15.7
Fluorobenzene	9.2
Formaldehyde	10.87
Formamide	10.25
Formic acid	11.05
Freon 11 (trichlorofluoromethane)	11.77
Freon 112 (1,1,2,2-tetrachloro-1,2- difluoroethane)	11.3
Freon 113 (1,1,2-trichloro-1,2,2- trifluororethane)	11.78
Freon 114 (1,2-dichloro-1,1,2,2- tetrafluoroethane)	12.2
Freon 12 (dichlorodifluoromethane)	12.31
Freon 13 (chlorotrifluoromethane)	12.91
Freon 22 (chlorofluoromethane)	12.45
Furan	8.89
Furfural	9.21
m-Fluorotoluene	8.92
o-Fluorophenol	8.66
o-Fluorotoluene	8.92
p-Fluorotoluene	8.79
H
1-Hexene	9.46
2-Heptanone	9.33
2-Hexanone	9.35
Heptane	10.08
Hexachloroethane	11.1
Hexane	10.18
Hydrazine	8.1
Hydrogen	15.43
Hydrogen bromide	11.62
Hydrogen chloride	12.74
Hydrogen cyanide	13.91
Hydrogen fluoride	15.77
Hydrogen iodide	10.38
Hydrogen selenide	9.88
Hydrogen sulfide	10.46
Hydrogen telluride	9.14
Hydroquinone	7.95
I
1-Iodo-2-methylpropane	9.18
1-Iodobutane	9.21
1-Iodopentane	9.19
1-Iodopropane	9.26
2-Iodobutane	9.09
2-Iodopropane	9.17
Iodine	9.28
Iodobenzene	8.73
Isobutane (Isobutylene)	9.4
Isobutyl acetate	9.97
Isobutyl alcohol	10.12
Isobutyl amine	8.7
Isobutyl formate	10.46
Isobutyraldehyde	9.74
Isobutyric acid	10.02
Isopentane	10.32
Isophorone	9.07
Isoprene	8.85
Isopropyl acetate	9.99
Isopropyl alcohol	10.16
Isopropyl amine	8.72
Isopropyl benzene	8.69
Isopropyl ether	9.2
Isovaleraldehyde	9.71
m-Iodotoluene	8.61
o-Iodotoluene	8.62
p-Iodotoluene	8.5
K
Ketene	9.61
L
2,3-Lutidine	8.85
2,4-Lutidine	8.85
2,6-Lutidine	8.85
M
2-Methyl furan	8.39
2-Methyl naphthalene	7.96
1-Methyl naphthalene	7.96
2-Methyl propene	9.23
2-Methyl-1-butene	9.12
2-Methylpentane	10.12
3-Methyl-1-butene	9.51
3-Methyl-2-butene	8.67
3-Methylpentane	10.08
4-Methylcyclohexene	8.91
Maleic anhydride	10.8
Mesityl oxide	9.08
Mesitylene	8.4
Methane	12.98
Methanethiol (methyl mercaptan)	9.44
Methyl acetate	10.27
Methyl acetylene	10.37
Methyl acrylate	9.9
Methyl alcohol	10.85
Methyl amine	8.97
Methyl bromide	10.54
Methyl butyl ketone	9.34
Methyl butyrate	10.07
Methyl cellosolve	9.6
Methyl chloride	11.28
Methyl chloroform (1,1,1- trichloroethane)	11
Methyl disulfide	8.46
Methyl ethyl ketone	9.53
Methyl formate	10.82
Methyl iodide	9.54
Methyl isobutyl ketone	9.3
Methyl isobutyrate	9.98
Methyl isocyanate	10.67
Methyl isopropyl ketone	9.32
Methyl isothiocyanate	9.25
Methyl mercaptan	9.44
Methyl methacrylate	9.7
Methyl propionate	10.15
Methyl propyl ketone	9.39
� -Methyl styrene	8.35
Methyl thiocyanate	10.07
Methylal (dimethoxymethane)	10
Methylcyclohexane	9.85
Methylene chloride	11.32
Methyl-n-amyl ketone	9.3
Monomethyl aniline	7.32
Monomethyl hydrazine	7.67
Morpholine	8.2
n-Methyl acetamide	8.9
N
1-Nitropropane	10.88
2-Nitropropane	10.71
Naphthalene	8.12
Nickel carbonyl	8.27
Nitric oxide, (NO)	9.25
Nitrobenzene	9.92
Nitroethane	10.88
Nitrogen	15.58
Nitrogen dioxide	9.78
Nitrogen trifluoride	12.97
Nitromethane	11.08
Nitrotoluene	9.45
p-Nitrochloro benzene	9.96
O
Octane	9.82
Oxygen	12.08
Ozone	12.08
P
1-Pentene	9.5
1-Propanethiol	9.2
2,4-Pentanedione	8.87
2-Pentanone	9.38
2-Picoline	9.02
3-Picoline	9.02
4-Picoline	9.04
n-Propyl nitrate	11.07
Pentaborane	10.4
Pentane	10.35
Perchloroethylene	9.32
Pheneloic	8.18
Phenol	8.5
Phenyl ether (diphenyl oxide)	8.82
Phenyl hydrazine	7.64
Phenyl isocyanate	8.77
Phenyl isothiocyanate	8.52
Phenylene diamine	6.89
Phosgene	11.77
Phosphine	9.87
Phosphorus trichloride	9.91
Phthalic anhydride	10
Propane	11.07
Propargyl alcohol	10.51
Propiolactone	9.7
Propionaldehyde	9.98
Propionic acid	10.24
Propionitrile	11.84
Propyl acetate	10.04
Propyl alcohol	10.2
Propyl amine	8.78
Propyl benzene	8.72
Propyl ether	9.27
Propyl formate	10.54
Propylene	9.73
Propylene dichloride	10.87
Propylene imine	9
Propylene oxide	10.22
Propyne	10.36
Pyridine	9.32
Pyrrole	8.2
Q
Quinone	10.04
S
Stibine	9.51
Styrene	8.47
Sulfur dioxide	12.3
Sulfur hexafluoride	15.33
Sulfur monochloride	9.66
Sulfuryl fluoride	13
T
o-Terphenyls	7.78
1,1,2,2-Tetrachloro-1,2- difluoroethane (Freon 112)	11.3
1,1,1-Trichloroethane	11
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)	11.78
2,2,4-Trimethyl pentane	9.86
o-Toluidine	7.44
Tetrachloroethane	11.62
Tetrachloroethene	9.32
Tetrachloromethane	11.47
Tetrahydrofuran	9.54
Tetrahydropyran	9.25
Thiolacetic acid	10
Thiophene	8.86
Toluene	8.82
Tribromoethene	9.27
Tribromofluoromethane	10.67
Tribromomethane	10.51
Trichloroethene	9.45
Trichloroethylene	9.47
Trichlorofluoromethane (Freon 11)	11.77
Trichloromethane	11.42
Triethylamine	7.5
Trifluoromonobromo-methane	11.4
Trimethyl amine	7.82
Tripropyl amine	7.23
V
o-Vinyl toluene	8.2
Valeraldehyde	9.82
Valeric acid	10.12
Vinyl acetate	9.19
Vinyl bromide	9.8
Vinyl chloride	10
Vinyl methyl ether	8.93
W
Water 1	2.59
X
2,4-Xylidine	7.65
m-Xylene	8.56
o-Xylene	8.56
p-Xylene	8.45

Gas / Vapor	LEL [Low Explosive Level]	Relative Response (with respect to Methane)
Acetic Acid	5.4%	0.20
Acetone	2.6%	0.35
Ammonia	15%	0.65
Benzene	1.3%	0.35
Butyl Acetate	1.4%	0.30
Cyclo-hexane	1.3%	0.45
Cyclo-pentane	1.4%	0.5
Decane	0.75%	0.20
Dioxane	2.0%	0.50
Ethane	3.0%	0.85
Ethanol	3.3%	0.45
Ethyl Acetate	2.2%	0.35
Ethylene	2.7%	0.65
Hydrogen	4.0%	0.95%
Iso-Butane	1.8%	0.55
Iso-Butyl Alcohol	1.7%	0.30
Iso-Butyl Methyl Ketone	1.2%	0.25
Iso-Octane	0.95%	0.35
Iso-Pentane	1.4%	0.45
Iso-Propyl Alcohol	2.2%	0.35
Methane	5.0%	1.0
Methanol	6.7%	0.70
Methyl Ethyl Ketone (MEK)	1.9%	0.35
Nonane	0.85%	0.25
Propane	2.1%	0.60
Propylene	2.4%	0.70
Styrene Monomer	1.1%	0.30
Toluene	1.2%	0.40

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