Crowcon Xgard Type 3 Fixed Gas Detector

Code: XG3
  • Catalytic bead sensor
  • Flammable gas
  • Zones 1 or 2, Div 1 or 2

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The Crowcon Xgard Type 3 is an Exd Flameproof flammable gas detector using a poison resistant pellistor within an Xgard enclosure, which also contains the terminals to provide a three-wire mV Wheatstone Bridge output.  Can be connected directly to Crowcon Gasmaster and Gasmonitor, an Accessory Enclosure accessory is required for connection to 4-20mA type control systems such as Vortex.

Suitable for use with a range of cable glands; M20 or 1/2″ NPT or 3/4″ NPT. There is a choice of housing; durable aluminium with a tough polyester coating or 316 stainless steel suitable for deployment in extreme environments, such as offshore or in heavy industry- corrosion resistant.

Units can be installed on walls or ceilings, with three junction box choices—replacement sensors plugin.  Accessories are available for duct mounting, sampling applications and remote gassing – simple sensor checking.  In wash down areas or marine applications, splash guards and weatherproof caps are available.


  • Simple install and maintenance, common spares for all Xgard types, minimise inventory
  • Validated to IEC 61508 (SIL 1 to SIL 3)
  • Ingress protection IP65
  • Operating temperature -40 to +80°C
  • Response time T90 <15s (typical)
  • Global approvals ATEX/ IECEx UL, INMETRO & GOST-R
  • Size 156 x 166 x 111 mm (6.1 x 6.5 x 4.3 inches)
  • Weight Aluminium 1kg & Stainless Steel 3.1kg

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Title Size
Xgard-Datasheet 249 KB
Xgard Manual 1 MB
Xgard-Data-Sheet_es_ES 1 MB
Xgard-Data-Sheet_pt_BR 1 MB

Additional information

Weight 0.09 kg

Ordering Information

XG3-A2-01-FD Xgard Type 3 Alu 1/2NPT ATEX/IECEx CH4-100LEL
XG3-A2-01-FQ Xgard Type 3 Alu 1/2NPT ATEX/IECEx NH3-25LEL
XG3-A2-02-FH Xgard Type 3 Alu 1/2NPT UL C3H8-100LEL
XG3-A2-02-FG Xgard Type 3 Alu 1/2NPT UL C4H10-100LEL
XG3-A2-02-FD Xgard Type 3 Alu 1/2NPT UL CH4-100LEL
XG3-A1-01-FM Xgard Type 3 Alu M20 ATEX/IECEx C2H2-100LEL
XG3-A1-01-FC Xgard Type 3 Alu M20 ATEX/IECEx C2H4-100LEL
XG3-A1-01-FB Xgard Type 3 Alu M20 ATEX/IECEx C2H5OH-100LEL
XG3-A1-01-FH Xgard Type 3 Alu M20 ATEX/IECEx C3H8-100LEL
XG3-A1-01-FG Xgard Type 3 Alu M20 ATEX/IECEx C4H10-100LEL
XG3-A1-01-FI Xgard Type 3 Alu M20 ATEX/IECEx C5H12-100LEL
XG3-A1-01-FY Xgard Type 3 Alu M20 ATEX/IECEx C6H14-100LEL
XG3-A1-01-FJ Xgard Type 3 Alu M20 ATEX/IECEx C7H8-100LEL
XG3-A1-01-FL Xgard Type 3 Alu M20 ATEX/IECEx CH3OH-100LEL
XG3-A1-01-FD Xgard Type 3 Alu M20 ATEX/IECEx CH4-100LEL
XG3-A1-01-FA Xgard Type 3 Alu M20 ATEX/IECEx H2-100LEL
XG3-A1-01-FR Xgard Type 3 Alu M20 ATEX/IECEx JET FUEL-100LEL
XG3-A1-01-FW Xgard Type 3 Alu M20 ATEX/IECEx LPG-100LEL
XG3-A1-01-FQ Xgard Type 3 Alu M20 ATEX/IECEx NH3-25LEL
XG3-A1-01-FF Xgard Type 3 Alu M20 ATEX/IECEx P.VAP-100LEL(UnL)
XG3-A1-02-FA Xgard Type 3 Alu M20 UL H2-100LEL
XG3-S2-01-FQ Xgard Type 3 SSteel 1/2NPT ATEX/IECEx NH3-25LEL
XG3-S5-01-FA Xgard Type 3 SSteel 2xM20 ATEX/IECEx H2-100LEL
XG3-S1-01-FI Xgard Type 3 SSteel M20 ATEX/IECEx C5H12-100LEL
XG3-S1-01-FD Xgard Type 3 SSteel M20 ATEX/IECEx CH4-100LEL
XG3-S1-01-FW Xgard Type 3 SSteel M20 ATEX/IECEx LPG-100LEL
XG3-S1-01-FF Xgard Type 3 SSteel M20 ATEX/IECEx P.VAP-100LEL(UnL)
Xgard Type 3 Spare Sensor Modules
S011509/S 0-100% LEL methane – pellistor – pellistor VQ21T
S011511/S 0-100% LEL pentane – pellistor VQ21T
S011513/S 0-100% LEL hydrogen – pellistor VQ21T
S011517/S 0-100% LEL ethanol – pellistor VQ21T
S012162/S 0-100% LEL methanol – pellistor VQ21T
S011518/S 0-100% LEL acetylene – pellistor VQ21T
S011519/S 0-100% LEL butane – pellistor VQ21T
S011520/S 0-100% LEL ethane – pellistor VQ21T
S011521/S 0-100% LEL ethylene – pellistor VQ21T
S011522/S 0-100% LEL LPG – pellistor VQ21T
S011523/S 0-100% LEL propane – pellistor VQ21T
S011524/S 0-100% LEL petrol vapour (unleaded) – pellistor VQ21T
S012171/S 0-25% LEL hydrogen – pellistor VQ21T
S012003/S 0-100% LEL acetaldehyde – pellistor 300P
S012973/S 0-100% LEL hexane – pellistor VQ21T
S012977/S 0-100% LEL isopropyl alcohol (IPA) – pellistor VQ21T
S0111001/S 0-100% LEL toluene – pellistor VQ21T
S011840/S 0-100% LEL ethylene dichloride (EDC) – pellistor VQ25
S012972/S 0-100% LEL vinyl chloride monomer (VCM) – pellistor VQ25
S011487/S 0-100% LEL jet fuel – pellistor VQ41T
S011489/S 0-25% LEL ammonia – pellistor VQ41T
S012988/S 0-100% LEL methane – pellistor NP-30#
S012989/S 0-100% LEL pentane – pellistor NP-30#
Xgard Accessories
C011061 Accessory adaptor* (spare) – M20 threaded adaptor for connecting other accessories
C01051 Collector cone* – includes accessory adaptor. For aiding detection of light gases such as methane.
C01052 Spray deflector* – includes accessory adaptor. For outdoor installations & protection from water sprays.
C01442 Weatherproof cap* – includes accessory adaptor. For use offshore or very wet environments.
C01339 Flow adaptor, for use in sampling applications.
C011063 Sun shield. Protects against excessive heat build-up due to direct sunlight. Supplied with fixing rivets.
C03005 Calibration adaptor.
C01254 Carbon cloth filter (self adhesive) – for Xgard Types 3, 4 and 5 only. Removes long chain hydrocarbons.
S011918 Duct mounting kit* – Stainless steel plate with 6mm remote calibration fitting. Maximum duct airflow: 6m/s. Not compatible with Stainless Steel Xgard.
2575/2 Detector pulley system. Enables Xgard methane and hydrogen detectors to be lowered from high level for calibration.
00109A Calibration termination box (ABS box which enables gas to be applied to detectors remotely, a spray deflector or collector cone is also required on the detector).
M04214 PTFE tube 6 mm OD x 1 mm wall for use with calibration termination box. Price per metre length.

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