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


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#

# very high poison resistance

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