Crowcon Xgard Type 3 - Fixed Gas Detector
The Crowcon 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, GOST-R and MED.
The 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 3-wire mV Wheatsone Bridge output. Operating temperature -40 to +80°C.
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.
Type 1 |
Type 2 |
Type 3 |
Type 4 |
Type 5 |
Type 6 |
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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) |
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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) |
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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 |
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Ingress protection |
IP65 |
IP54 |
IP65 |
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Cable entries |
1 x M20, 1/2 “NPT or 3/4 NPT* on right-side |
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Terminations |
0.5 to 2.5mm2 |
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Sensor type |
Electrochemical |
Catalytic bead |
316 S/S sensor housing with catalytic beads |
Catalytic bead |
Thermal conductivity |
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Operating temperature |
-40 to +50 °C |
-20 to +50°C (-4 to 122°F) |
-40 to +80°C |
-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 |
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Repeatability Zero drift |
<2% FSD (Typical)<2% FSD per Month (Typical) |
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Response time |
T90 <15s OxygenT90 <30s to 120s Toxic(sensor dependant) |
T90 <15s (Typical) |
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Operating voltage |
8-30V dc |
2.0V dc +/- 0.1V (Typical) |
10-30V dc |
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Power requirements |
24mA maximum |
300mA (Typical) |
50mA at 24V dc 1.2W |
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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) |
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Approvals |
ATEX: II 1 G |
ATEX: II 2GD |
ATEX: II 2 GD |
ATEX: II 2 GDExd IIC T3 Gb (Tamb -40 to +150°C) |
ATEX: II 2 GDExd IIC T6 Gb (Tamb -40 to +50°C) |
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EMC compliance |
EN 50270 FCC Part 15 ICES- 003 |