Xgard Fixed Point Gas Detector

The Xgard range is a comprehensive selection of fixed point gas detectors that meet the diverse requirements for gas detection in industries throughout the world. This includes many water treatment, oil and gas, power, research facility and manufacturing installations.

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 and GOST-R.

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

Positive Safety

Crowcon's visual 'traffic light' indication, provides constant visual assurance that T4 is operating soundly and conforms to site bump test & calibration policy. The bright green and red Positive Safety LEDs are visible to all and offer a quick, simple and comprehensive indication of monitor status to both the user and others around them.

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)

Specification

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

Download

Certificate	Datasheet	Manual
SIL Declaration Xgard Type 1 Bias Toxic	Xgard – European English	Xgard ASU Manual (Issue 9 Sep 16)
ATEX Certificate, Type 1	Xgard – US English (Letter Size)	Xgard IR Manual – Multi-Language (Issue 6 Apr 18)
ATEX Certificate, Type 2 to 6 and IR	XgardIR – European English	Xgard Type 1, 2, 3 & 5 – Duct Mounting Kit Instructions (Issue 2 Sept 15)
IECEx Certificate, Type 1	XgardIR – US English (Letter Size)	Xgard Type 4 – Duct Mounting Kit Instructions (Issue 3 Jan 15)
IECEx Certificate, Type 2 to 6 and IR		Xgard Manual – English (Issue 11 Jan 15)
SIL Declaration Xgard Type 1 O2		Xgard ESU Manual (Issue 5 Jan 15)
SIL Declaration Xgard Type 1 Toxic		Xgard Type 5/6/IR Functional Safety Manual
SIL Declaration Xgard Type 2 Bias Toxic
SIL Declaration Xgard Type 2 O2
SIL Declaration Xgard Type 2 Toxic
SIL Declaration Xgard Type 3
SIL Declaration Xgard Type 4
SIL Declaration Xgard Types 5, 6 and IR
INMETRO Certificate, Type 2 to 6 and IR