Crowcon Xgard Fixed Gas Detector Selector

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Main Page > Fire Alarm Systems > Crowcon Xgard Fixed Gas Detectors > Crowcon Xgard Fixed Gas Detector Selector

Xgard Range offers comprehensive selection of fixed gas detectors that meet the diverse requirimentsfor flammable or toxic gas detection and oxygen monitor in industries throughout the world.
This Guide is design to help you to choose the correct Xgard detector to suits your needs.

Xgard Type1 : Intrinsically Safe electrochemical type detector with 2-wire 4-20mA output. Wide range of sensor options. A zener barrier or galvanic isolator is required for I.S. operation.

Xgard Type2 : Flameproof electrochemical type detector with 2-wire 4-20mA output

Xgard Type3 : Flameproof catalytic bead type detector with 3-wire mV bridge output.

Xgard Type4 : Flameproof high temperature (up to 150°C) catalytic bead type detector with mV bridge output.

Xgard Type5: Flameproof catalytic bead type detector with 3-wire 4-20mA output.

Xgard Type6 Flameproof thermal conductivity type detector with 3-wire 4-20mA output.

Detector

Type No. Code

Enclosure Code

Cable Entry Code

Certification Code

Gas Type

Range

XGARD
XSAFE

Type 1 - 1
Type 2 - 2
Type 3 - 3
Type 4 - 4
Type 5 - 5
Type 6 - 6
Xsafe - XS

mV or mA

Standard - A
Stainless Steel - S

M20 - M20

1/2" NPT - 1/2"

3/4" NPT - 3/4" *3

ATEX - AT

UL - UL

Abbreviated up to 8 characters

From selection shown on the table

Example product reference for an I.S 0-25ppm H2S Detector with ATEX certification and M20 cable entry in a standard junction box : XGARD/1/A/M20/AT/H2S/25

	LTEL (ppm) LEL (% Vol)	STEL (ppm) UEL (% Vol)	Range Available: Type 1	Range Available: Type 2	Ranges Available: Type 3, 4, 5 & Xsafe	Range Available: Type 6
Acetylene (C2H2)	2,3	100			0- 100% LEL*
Ammonia (NH3)	25 15	35 33.6	50, 100, 250, 500, 1000 ppm		0- 25% LEL*
Argon (Ar)	-	-	-	-	-	-
Arsine (AsH3)	0.05	-	1 ppm	-	-	-
Bromine (Br2)	0.1	0.2	3 ppm	-	-	-
Butane (C4H10)	1.4	9.3	-	-	0-100% LEL*	-
Carbon dioxide (CO2)	5000 (0.5% Vol)	15000 (1.5% Vol)	-	-	-	-
Carbon monoxide (CO)	30	200	50, 100, 200, 250, 500, 1000, 2000 ppm	50, 100, 200, 250, 500, 1000, 2000 ppm	-	-
Chlorine (Cl2)	-	0.5	3, 5, 10, 20, 50, 100 ppm	-	-	-
Chlorine Dioxide (ClO2)	0.1	0.3	1 ppm	-	-	-
Diborane (B2H6)	0.1	-	1 ppm	-	-	-
Ethane (C2H6)	2.4	15.5	-	-	0-100%* LEL	-
Ethylene (C2H4)	2.3	36	-	-	0-100%* LEL	-
Ethylene oxide (C2H4O)	5		10, 50, 100 ppm	-	-	-
Fluorine (F2)	1	1	1 ppm	-	-	-
Germane (GeH4)	0.2	0.6	2 ppm	-	-	-
Helium (He)	-	-	-	-	-	-
Hydrogen (H2)	4	77	200, 2000 ppm	200, 2000 ppm 100% LEL	0- 100%* LEL 50% LEL, 100% LEL	0-5%, 10%, 50% vv (in air) 0-20%, 25%, 30%, 50% vv (H2in N2 )
Hydrogen chloride (HCl)	1	5	10, 25 ppm	-	-	-
Hydrogen cyanide (HCN)	-	10	25 ppm	-	-	-
Hydrogen Fluoride (HF)	1.8	3	10 ppm	-	-	-
Hydrogen sulphide (H2S)	5	10	5, 10, 20, 25, 50, 100, 200, 250, 300, 1000 ppm	5, 10, 20, 25, 50, 100, 200 ppm	-	-
LPG	2	10	-	-	0-100% LEL	-
Methane (CH4)	4.4	17	-	-	0-100% LEL	-
Nitric Oxide (NO)	5*1	5*1	25, 50, 100 ppm	-	-	-
Nitrogen dioxide (NO2)	1*1	1*1	10, 50, 100 ppm	-	-	-
Ozone (O3)	-	0.2	1 ppm	-	-	-
Oxygen (O2)	-		25% Vol	25% Vol	-	-
Pentane (C5H12)	1.1 600ppm	8.7 1800ppm	-	-	0-100% LEL*	-
Petrol vapour	1.4	6	-	-	0-100% LEL*	-
Phosgene (COCl2)	0.02	0.06	1 ppm	-	-	-
Phosphine (PH3)	0.1	0.2	1 ppm	-	-	-
Propane (C3H8)	1.7	10.9		-	0-100% LEL	-
Silane (SiH4)	0.5	1	1 ppm	-		-
Sulphur Dioxide (SO2)	1*1	1*1	10, 20, 50, 100, 250 ppm	-	-	-
Vinyl chloride (VCM) (CH2= CHCl)	3.6 3	33 -	-	-	0-100% LEL	-
*Volatile organics (VO)2**	-		0- 100 ppm *2	-	-	-