xgard overview - crowcon detection instruments ltd

Xgard Overview

© 2018 Crowcon Detection Instruments. All rights reserved.

Fixed – Detector head range overview

Capability

Mar

ket P

rice

Xgard & Xsafe

Xgard IR

Flamgard+

Txgard / Txgard IS

Xgard Bright

Xgard IQ

IRmax

Range of Detector heads

Infra red Xgard

Flammable gas detector head with display

Toxic gas detector heads with display

Addressable detector with display

Intelligent detector and transmitter

Infra red Hydrocarbon detector

Analog 4-20mA Non intrusive / Display

SIL certification.

Remote sensor / display


Xgard Summary

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.

Xgard offers three different sensor concepts so you can choose exactly what you need for your site. Xgard is available in flameproof, intrinsically safe, or safe area formats for use in all environments, whatever the classification.

Range of fixed gas detectors with wide range of sensor & gas detection options that provide low cost of ownership with

rugged, reliable and highly versatile

Available gases

Contact us for more gas / sensor options

NH3 AsH3 Br2 CO Cl2 B2H6 C2H4O F2 O3 H2 HCI HCl HF H2S NO

PH3 NH3 SO2 VOC O2 C4H10 C4H8 CO2 C2H50H C2H4 C6H14 LPG CH4 NO2 O3

Key Features


Wide range of sensors

• Entry level fixed head for wide range of sensors options including

catalytic, electrochemical and infrared.

• Thermal conductivity detector (Xgard Type 6) was obsoleted in

2019. Spare support is available till 2026.

• Includes exotic gas options e.g jet fuel, leaded petrol and vapours

containing halogens

• Gas type, sensor range (correspond to analogue output) and part

number for spares are listed on the label.

• Year of manufacture is also reflected on label.


Low cost of ownership

• Xgard is available in various casing options including high-grade

alloy, stainless steel or chemically resistant GRN polymer

• Design for easy installation and maintenance to keep cost down

• Replacement of sinters and sensor is simple. Spare sensors

simply plug-in

• Many spare parts are common to all Xgard models, which keeps

spares inventory to a minimum.


Flexible installation options

Spray deflectors

Mounting brackets

Duct mounting kits

Flow adaptors

Sun-shades

Calibration adaptors

Collector cones

Spigot glands

Carbon filters


Full range of certification

• Xgard has full range of certification including

ATEX, IECEx and UL

• Validated to the functional safety standard IEC

61508 (SIL 1 to SIL 3)

• Marine certification – Inmetro for Type 2 to 5.

• Xsafe is low cost non-certified pellistor sensor to

suit safe installations e.g. industrial boilers,

kitchen, gas-fired oven.

Certification


Type 1 Type 2 Type 3 Type 4 Type 5 Xgard IR

ATEX: II 1 GExia IIC T4 Ga

(Tamb -40 to +55°C)UL/cUL: Class I, Div.

1Groups A, B, C, D

IECExEAC

ATEX: II 2GDExd IIC T6 Gb (Tamb -

40 to +50°C)UL: Class I, Div. 1

Groups B, C, DIECExEAC

ATEX: II 2 GDExd IIC T4 Gb

(Tamb -40 to +80°C)Exd IIC T6 Gb (Tamb -40

to +50°C)Ex tb IIIC

T180°C DbUL: Class I, Div. 1


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 DbUL: Class I, Div. 1


ATEX: Ex II 2GDEx d IIC T6 Gb Ex tb

IIIC T80°C Db (-40°C ≤ Tamb ≤ + 50°C)

Ex d IIC T4 Gb Ex tb IIIC T110°C Db (-40°C

≤ Tamb ≤ + 80°C)IECEx: Ex d IIC T6 Gb Ex tb IIIC T80°C Db (-40°≤ Tamb ≤ + 50°C)Ex d IIC T4 Gb Ex tb

IIIC T110°C Db (-40°≤ Tamb ≤ + 80°C)

UL Class 1 Div 1, Groups B, C, D

EMC compliance EN 50270 FCC Part 15 ICES- 003

Specification


Type 1 Type 2 Type 3 Type 4 Type 5/ XSafe Xgard IR

Sensor type Electrochemical Catalytic bead316 S/S sensor housing with

catalytic beadsCatalytic bead Infrared

Operating temperature

-40 to +50 °C-20 to +50°C(-4 to 122°F)

-40 to +80°C -20 to +150°C -20 to +55°C -20 to +55°C (-40 to 122 °F) (-40 to 176°F) (-4 to 302°F) (-40 to 131°F) (-4°F to 131°F)

(sensor dependant)

Humidity 10 to 95% RH non-condensing 0-99% RH non-condensing0 to 95% RH non-

condensing

Repeatability Zero drift

<2% FSD (Typical)<2% FSD per Month (Typical)

Response timeT90 <15s OxygenT90 <30s to 120s

Toxic(sensor dependant)T90 <15s (Typical)

Operating voltage 8-30V dc 2.0V dc +/- 0.1V (Typical) 10-30V dcPower requirements

24mA maximum 300mA (Typical) 50mA at 24V dc 1.2W

Electrical output 2- wire 4-20mA (current sink)3- wire mV bridge 3- wire mV bridge 3- wire 4-20mA Typical signal: 12-15mV/ %LEL CH4

Typical signal: >10mV/%LEL CH4

(current sink or source)


Type 1 Type 2 Type 3 Type 4 Type 5/ XSafe Xgard IR

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 kgAluminium: 1kg

(2.2lbs)

1.5 kg (3.3lbs)

Aluminium: 1kg (2.2lbs)

Alloy: 1kg (2.2lbs)316 Stainless steel: 3.1kg (6.8lbs)

Stainless steel: 3.1kg (6.8lbs)

S/S: 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

SteelAluminium 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

Servicing


Xgard Calibration

• Calibration of Xgard requires opening of detector cover,

user will need to disable alarm at control panel before

calibration.

• Tools required include flow adapter, multi-meter and

calibration gas (contact Crowcon for supply of calibration

gas)

• Follow Crowcon manual for calibration steps and

frequency of calibration

• Sensor replacement is simple, just plug in sensor module

• Many spare parts are common to all Xgard models, only

sensor module and amplifier PCB are unique to gas

types.

Summary


Key attributes and decision points

❖ Workhorse model with wide selection of sensors, enclosure materials and

mounting accessories

❖ mA or mV output only. Units comes without display or relays

❖ Easy replacement of spares and boards

❖ Intrusive calibration, which means hot work permit will be required if Xgard is

installed in a hazardous area.


Xgard Summary

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.

Xgard offers three different sensor concepts so you can choose exactly what you need for your site. Xgard is available in flameproof, intrinsically safe, or safe area formats for use in all environments, whatever the classification.

Range of fixed gas detectors with wide range of sensor & gas detection options that provide low cost of ownership with

rugged, reliable and highly versatile

Available gases

Contact us for more gas / sensor options

NH3 AsH3 Br2 CO Cl2 B2H6 C2H4O F2 O3 H2 HCI HCl HF H2S NO

PH3 NH3 SO2 VOC O2 C4H10 C4H8 CO2 C2H50H C2H4 C6H14 LPG CH4 NO2 O3

xgard overview - crowcon detection instruments ltd

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