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Xgard

Detectors for flammable, toxic and oxygen gases

Overview

Overview

Intrinsically Safe (I.S.) or Flameproof (Exd) versions are available, with case options comprising high-grade alloy, stainless steel or chemically resistant GRN polymer. Certifications include IECEx, ATEX, UL, GOST-R and MED.

Low cost of ownership

  • Designed for easy installation and maintenance - keeps costs down
  • Three junction box options - designed to make replacement of sensors and sinters extremely simple. Spare sensors simply plug-in
  • Many spare parts are common to all Xgard models - keeps spares holding requirements to a minimum

Flexible installation options

  • Designed for either wall or ceiling mounting - no need for additional brackets
  • Can accommodate M20, 1/2" NPT or 3/4" NPT cable glands - suits all site requirements
  • High temperature models are available for hot environments (up to 150oc)
  • Accessories are available for duct mounting and sampling applications as well as remote gassing - simple sensor checking

Wide range of sensors

  • Poison resistant pellistors, for all flammable detection needs including hydrocarbons, hydrogen, ammonia, jet fuel, leaded petrol and vapours containing halogens
  • Electrochemical sensors are used to detect a vast range of toxic gases and oxygen
  • Thermal conductivity sensors are available to monitor % volume concentrations of gases

Rugged and reliable

  • Manufactured using a choice of three materials: glass reinforced nylon, highly durable aluminium with a tough polyester coating, or 316 stainless steel for ultimate corrosion resistance - designed to operate even in the harshest environments
  • Spray deflectors and weatherproof caps are available for use in areas subject to regular wash-downs, or offshore environments
  • All models have been validated to the functional safety standard IEC 61508 (SIL 1 to SIL 3)

Contact [email protected] for more information.

Specs

Specifications

  Type 1 Type 2 Type 3 Type 4 Type 5 Type 6
Size 156 x 166 x 111mm (6.1 x 6.5 x 4.3 inches) 195 x 166 x 111mm (7.6 x 6.5 x 4.3 inches) 156 x 166 x 111mm (6.1 x 6.5 x 4.3 inches)
Weight Nylon: 0.5 kgAlloy: 1kg (2.2lbs)316 S/S: 3.1kg (6.8lbs) Aluminium: 1kg (2.2lbs)Stainless steel: 3.1kg (6.8lbs) 1.5 kg (3.3lbs) Aluminium: 1kg (2.2lbs) Stainless steel: 3.1kg (6.8lbs)
Enclosure material ATEX certified: Glass reinforced nylon or 316 S/SUL Certified: Aluminium or 316 S/S Aluminium or 316 Stainless Steel Aluminium Aluminium or 316 Stainless Steel
Ingress protection IP65 IP54 IP65
Cable entries 1 x M20, 1/2 “NPT or 3/4 NPT* on right-side
Terminations 0.5 to 2.5mm2
Sensor type Electrochemical Catalytic bead 316 S/S sensor housing with catalytic beads Catalytic bead Thermal conductivity
Operating temperature -40 to +50 °C
(-40 to 122 °F)
(sensor dependant)
-20 to +50°C (-4 to 122°F) -40 to +80°C 
(-40 to 176°F)
-20 to +150°C (-4 to 302°F) -40 to +55°C (-40 to 131°F) +10 to +55°C (50 to 301°F)
Humidity 10 to 95% RH non-condensing 0-99% RH non-condensing 0-90% RH
Repeatability Zero drift <2% FSD (Typical)<2% FSD per Month (Typical)
Response time T90 <15s OxygenT90 <30s to 120s Toxic(sensor dependant) T90 <15s (Typical)
Operating voltage 8-30V dc 2.0V dc +/- 0.1V (Typical) 10-30V dc
Power requirements 24mA maximum 300mA (Typical) 50mA at 24V dc 1.2W
Electrical output 2- wire 4-20mA (current sink) 3- wire mV bridgeTypical signal: 12-15mV/ %LEL CH4 3- wire mV bridgeTypical signal: >10mV/%LEL CH4 3- wire 4-20mA (current sink or source)
Approvals ATEX: II 1 G
Exia IIC T4 Ga
(Tamb -40 to +55°C)
UL/cUL: Class I, Div. 1
Groups A, B, C, D
IECEx
GOST-R
ATEX: II 2GD
Exd IIC T6 Gb (Tamb -40 to +50°C)
UL: Class I, Div. 1 
Groups B, C, D
IECEx
GOST-R
ATEX: II 2 GD
Exd IIC T4 Gb
(Tamb -40 to +80°C)
Exd IIC T6 Gb (Tamb -40 to +50°C)
Ex tb IIIC
T180°C Db
UL: Class I, Div. 1 
Groups B, C, D
IECEx
GOST-R
ATEX: II 2 GDExd IIC T3 Gb (Tamb -40 to +150°C) ATEX: II 2 GDExd IIC T6 Gb (Tamb -40 to +50°C)
Exd IIC T4 Gb (Tamb -40 to +80°C)
Ex tb IIIC
T180°C Db
UL: Class I, Div. 1
Groups B, C, D
IECEx
GOST-R
EMC compliance EN 50270       FCC Part 15    ICES- 003

*3/4 " cable entry only available on aluminium juntion boxes.

Accessories

Accessories

Below is a small selection of the accessories available for the Crowcon Xgard. For a full list please call 01235 557700 or Contact Us.

Spray deflector

C01052

For outdoor installations and protection from water sprays, for example in water treatment or food processing plants. Includes accessory adaptor. (Not suitable for use with Xgard Type 4)

Sun shield

C011063

Protects against excessive heat build-up due to direct sunlight. Supplied with fixing rivets.

Collector Cone

C01051

For aiding detection of light gases such as methane. 38cm/15" Dia. Includes accessory adaptor. (Not suitable for use with Xgard Type 4)

Weatherproof cap

C01442

For offshore or other extremely wet environments. Includes accessory adaptor. (Not suitable for use with Xgard Type 4)

Flow adaptor

C01339

For use where a gas sample is being piped to the detector.

Calibration adaptor

C03005

To enable calibration gas to be applied to the detector. One adaptor can be used for several detectors.

Duct mounting kit

S011918

Allows sampling within tubes and ducts. Stainless steel plate with 6mm remote calibration fitting. Maximum duct airflow: 6 metres per second. (Not compatible with Stainless Steel Xgard or Xgard Type 4.)

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