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Fixed Gas Detection

Home Fixed Gas Detection

Professional Safety Services (UK) Ltd is a Crowcon authorised fixed gas distributor and approved service centre. We offer a flexible range of fixed gas detection services and products which are able to detect flammable, toxic and oxygen gases, report their presence and activate alarms or associated equipment. We use a variety of measurement, protection and communications technologies and our fixed detectors have been proven in many arduous environments, including oil and gas exploration, water treatment, chemical plants and steel mills.

Key sectors we work in include: Water Utility Networks: Gas Utility Networks: Electricity Utility Networks: Defence: Rail Networks: Government: Civil Engineering: Breweries

Our service engineers are fully qualified CompEx trained and have undergone authorised service center certification training in fixed gas detection with our manufacturing partners. Calibration gasses and maintenance parts used are manufacturer certified and traceable with all records uploaded onto our 24-hour online service portal, which is complimentary for all customers.

SERVICES INCLUDE:

Supply of Fixed Gas Detectors
Site Surveys & Consultations
Commission Services
Post-Install Familiarisation & User Training
Maintenance & Calibration Services

Fixed Gas Detection Services at Professional Safety Services UK Ltd

CROWCON CONTROL PANELS

Crowcon GM ADDRESSABLE

Rack	19 inch rack mount option also available
Power	Typical power use without detector heads is 20 to 50 Watts
Electrical Output	4-20mA 2 wire current sink 4-20mA 3 wire current source RS-485 Modbus RTU Relays 5 Amp 30 Volt RJ45 network connection
Operating Temperature	-20 to + 50 degrees C
Humidity	0 to 90% non-condensing
Repeatability and drift	Digital channels – no controller variability Analog channels – <1% FSD change over a 1 year period
Approvals	May be used in a non-hazardous area as part of an intrinsically safe system.
EMC compliance	CE marked

Large Enclosure

Enclosure material	Fibreglass
Dimensions	612.4mm x 687.3mm x 241.6mm (24.11 x 27.06 x 9.51 inches)
Weight	25 Kg (55lbs)
Ingress Protection	NEMA 4X

Small Enclosure

Enclosure material	Fibreglass
Dimensions	406.4mm x 334.3mm x 215.9mm (16.00 x 13.16 x 8.50 inches)
Weight	7.7 Kg (17 lbs)
Ingress Protection	NEMA 4X

Crowcon’s range of GM Addressable Controllers comes in three variations, all with identical functionality, but with different channel input capabilities:

GM16: 1-16 Channel inputs
GM64: 1-64 Channel inputs
GM128: 1-128 Channel inputs

All available as 19” rack mounted, with enclosure options available for GM16 & GM64. All of the addressable gas detection controllers are modular, so the controller can be configured exactly to requirements. They only include what is needed for the application to reduce complexity and cost. With the ability to group channels into zoned areas, data can be viewed in a variety of ways to provide comprehensive insight into the safety of your site. From 3-minuite trends of one channel to an analysis of up to 16 channels at a time, with direct to web page live feed communication for remote viewing, you can feel confident you have full visibility and control of your environment at all times.

Crowcon Vortex

Vortex	Vortex Rack/Panel
Size	470 x 306 x 170mm (18.5 x 12 x 6.5 ins)	Rack display: standard 19” 3U Panel display: 441 x 128mm (cut-out 366 x 84.5mm) Modules, PSU and batteries are supplied separately for fitting within a cabinet.
Weight	12Kg (27lbs)	Dependant on configuration
Enclosure material	Back-box: Aluminium Front cover: ABS	Not applicable
Ingress protection	IP66	Cabinet dependent
Channels	Up to 12 (1 to 3 4-way input modules)
Operating temperature	-10°C to +40°C (14°F to +140°F)
Humidity	0-95% RH non-condensing
Inputs	Gas 2 or 3 wire 4-20mA (sink or source), 0-5V
	Fire – smoke & heat detectors, manual call-points Up to 3 loops, Up to 20 devices per loop
Outputs	External audible/visual alarm drive Via relays, four 24Vdc 0.5A supplies provided.
Relays	Type Up to 24 SPCO, contacts rated 6A @ 250Vac (1 to 3 8-way relay modules)	Up to 32 SPCO with bus extension module
	Assignment – Common Mains fail, battery low and fail
	Assignment – Voting Alarms, faults and system events
	Relay modes Energised/de-energised, latched/non-latched, time-delayed, pulsed

Digital communications	DCS/PLC/PC: RS-485 Modbus or Profibus Local configuration link: RS-232 (configuration software and lead supplied)
Event logging	Up to 300 alarm, power, fault, system events are stored in Non-Volatile Memory
Panel indication	Channel number: 2-digit 7-segment Green LED Gas reading: 4-digit 7-segment Red LED Measurement units: % LEL, ppm, % Vol, Fire Power: Green LED Battery OK: Green LED Run/hold indication: Green LED Channel test mode: Flashing Amber LED System fault – integrity watchdog: Amber LED
Alarm indication	Audible – internal sounder: Piezo Visual – Alarm: Level 1 & 2, Red LED; Fault – Per channel, Amber LED; Inhibit – Per zone, Amber LED
Power	AC mains: 110/120V & 220/240Vac (switchable) 50-60hz 3.2A max DC: 20-30Vdc Battery back-ip: 2Ah internal
Approvals	Low voltage directive: EN61010-1 EMC: Directive 2014/30/EU: EN50270, FCC: CRF47 Part 15, ICES-003 ATEX: Ex II 2G D Zone 1, Zone 2, IECEx optional

Even for large, complex sites with a variety of detection needs, the Vortex provides streamlined management of up to 12 devices, including 3 for fire, making it easy for you to have full visibility and control of your site. Each channel has 1 fault level and 3 alarm levels, which can be combined in any pattern to trigger up to 32 output relays. Designed with flexibility in mind, while the Vortex will initially be configured to suit your operational needs, channels and alarms can be easily customised by you, if requirements change, making the Vortex an adaptable solution. Vortex Rack & Panel formats comprise just the essential input, output and controller modules mounted on a DIN rail, with an optional display module available in panel-mounting and 19″ Rack formats. This configuration is ideal for incorporation into a variety of specialist enclosures, such as 19″ format or those with high ingress protection. A flameproof version is also available. Other standard features include RS-485 Modbus communications for remote non-intrusive calibration and configuration.

Crowcon Gasmaster

Gasmaster is a compact, versatile and powerful gas detection control panel that combines simple operation with an extensive array of input and output functions. Gasmaster provides all the information you need about your gas and fire detectors at a glance. The large multi-lingual display shows gas levels from all detectors simultaneously, with a user-friendly menu system that is intuitive, making system adjustment and testing using buttons on the front panel a straight forward process requiring minimal training.

Size	288 x 278 x 110mm (11.3 x 10.9 x 4.3 inches)
Weight	4.5kg (10lbs)
Enclosure material	Back-box: cast aluminium Front cover: ABS (flame retardant)
Ingress protection	IP65
Power	100-240Vac 50-60Hz or 20-30Vdc, 60W max
Battery back-up	1.2Ah batteries fitted internally
Operating temperature	-10°C to +50°C (14°F to +122°F)
Inputs	Gas One 2 or 3 wire 4-20mA gas detector (sink or source) or mV pellistor flammable gas detector	One to four 2 or 3 wire 4-20mA gas detectors (sink or source) or mV pellistor flammable gas detectors
	Fire One loop of up to 20 conventional smoke/heat detectors or manual call points, or one flame detector (4-20mA or digital contact signal)	One to four loops of up to 20 conventional smoke/heat detectors or manual call points, or one to four flame detectors
	ESU For use with one Crowcon ESU fan
	Remote inhibit/retest Via normally open contact
Outputs	Relays DPCO contacts rated 250Vac 8A Low alarm. High alarm. Fault. Alarm relays can be set for rising or falling alarms. Hysteresis can be adjusted on low alarms	Low alarm and high alarm per channel plus common low, high and fault. Alarm relays can be set for rising or falling alarms. Hysteresis can be adjusted on low alarms
	A/V alarm drive 12Vdc or 24Vdc 650mA max. drive. Suitable for +ve or -ve switched alarms
	Analogue 4-20mA (current source, max. loop resistance 700?) or 1-5Vdc (min. load 50k? )	4-20mA for each channel (current source, max. loop resistance 700?) or 1-5Vdc (min. load 50k?)
	Serial link RS-485 Modbus RTU for monitoring and control via DCS/SCADA/PLC systems
Communications port	Optional port for PC configuration and event log upload
Event logging*	Time-stamped log of up to 300 alarms, fault or system intervention activities
Panel indication	LCD back-lit display shows gas level (in ppb, ppm, % volume or % LEL units), and scrolling alpha-numeric status indication. LED’s for Alarm, Fault, Power and Warning. Integral 85dB sounder (at 10cm)
Approvals	EMC: EN50270, EN60945, FCC: CFR 47 Part 15; ICES – 003

*Event log access requires a Gasmaster PC communications kit and communications port (see Accessories).

CROWCON FIXED GAS DETECTOR HEADS

Crowcon Xgard

Even for large, complex sites with a variety of detection needs, the Vortex provides streamlined management of up to 12 devices, including 3 for fire, making it easy for you to have full visibility and control of your site. Each channel has 1 fault level and 3 alarm levels, which can be combined in any pattern to trigger up to 32 output relays. Designed with flexibility in mind, while the Vortex will initially be configured to suit your operational needs, channels and alarms can be easily customised by you, if requirements change, making the Vortex an adaptable solution. Vortex Rack & Panel formats comprise just the essential input, output and controller modules mounted on a DIN rail, with an optional display module available in panel-mounting and 19″ Rack formats. This configuration is ideal for incorporation into a variety of specialist enclosures, such as 19″ format or those with high ingress protection. A flameproof version is also available. Other standard features include RS-485 Modbus communications for remote non-intrusive calibration and configuration.

The Xgard range is a comprehensive selection of fixed multi gas detectors that meet the diverse requirements for gas detection globally. Whether you need gas detection around water treatment facilities, oil and gas, power, research facility or manufacturing installations, with three different sensors to choose from, there will be an Xgard to suit your needs.

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.

The Xgard range offers a comprehensive selection of fixed point gas detectors that meet the diverse requirements for flammable and toxic gas detection and oxygen monitoring in industries throughout the world.

Whichever version of the Xgard you choose, you can be confident that they’re all designed to operate in even the harshest conditions, and can be manufactured using materials which can withstand the conditions of your specific space.

With flexible installation options, the Xgard series can be either wall or ceiling mounted, without the need for additional brackets. Designed for easy installation, the replacement of sensors and sinters is extremely simple all helping to keep maintenance costs down.

Type 1	Type 2	Type 3	Type 4	Type 5	Type 6	Xsafe
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)		1kg (2.2lbs)
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		Aluminium
Ingress protection	IP65			IP54	IP65
Cable entries	1 x M20, or ¹/₂ “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	Catalytic bead
Operating temperature	-20 to +50 °C (-4 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)	mV: -40 to +80oC (-40 to 176oF) mA: -40 to +55oC (-40 to 131oF
Humidity	10 to 95% RH non-condensing		0-99% RH non-condensing			0-90% RH	0-99% 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	11-30V dc		2.0V dc +/- 0.1V (Typical)		10-30V dc		mA: 10- 30V dc mV:2.0Vdc
Power requirements	24mA maximum		300mA (Typical)		50mA at 24V dc 1.2W		MA:50mA at 24V dc 1.2W mV: 300mA (Typical)
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)		mA: 3- wire 4-20mA (current sink or source) mV: 3- wire mV bridge Typical signal: 12-15mV/ %LEL CH₄
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	ATEX: II 2GD Exd IIC T6 Gb (Tamb -40 to +50°C) UL: Class I, Div. 1 Groups B, C, D IECEx	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	ATEX: II 2 GDExd IIC T3 Gb (Tamb -40 to +150°C)	ATEX/IECEx: II 2 GD Ex db IIC T4 Gb – Ex tb IIIC T110˚C Db (Tamb -40 to +80˚C) Ex db IIC T6 Gb – Ex tb IIIC T80˚C Db (Tamb -40 to +50˚C) UL : Class I, Div 1 Groups B, C, D
EMC compliance	EN 50270 FCC Part 15 ICES- 003

*³/₄ ” cable entry only available on aluminium junction boxes.

Crowcon Xgard-Bright

Available with MPS technology to eliminate risk of poisoning and need for calibration, the Xgard Bright is the next generation of multi-gas detection. This fixed detector offers flammable and toxic gas detection and oxygen monitoring, combined with reduced installation costs and ease of operation.

Xgard Bright is a versatile detector offering flammable and toxic gas detection and oxygen monitoring, while providing ease of operation and reduced installation costs.

Choose from durable sensor options to suit your needs, such as MPS^TM (10+ years), Long-life O₂ (5 years) and IR sensors (10+ years) to prevent frequent sensor replacements and minimise operational expenses.

Lowering the cost of installation, the 4-wire addressable implementation drastically reduces cabling requirements. The large OLED display allows users to easily work with Xgard Bright during install, calibration and routine maintenance without the need to open the housing.

Providing analogue 4-20mA and RS-485 Modbus signals as standard, Xgard Bright comes with an Alarm and Fault relay as standard as well as optional HART communications.

Size	Aluminium enclosure: ATEX/IECEx: 156 x 166 x 109 mm (6.1 x 6.5 x 4.3 inch) UL: 162 x 166 x 110 mm (6.4 x 6.5 x 4.3 inch) Stainless Steel Enclosure: ATEX/IECEx: 165 x 166 x 105 mm (6.1 x 6.5 x 4.1 inch) UL: 162 x 166 x 103 mm (6.4 x 6.5 x 4.1 inch)
Cable Gland Entry	2x M20 or 2x ½” NPT (Stopping plug fitted to the left-side entry)
Operating Voltage	12-30Vdc.
Power	3W max
Electrical Output	3-wire 4-20mA (Sink or Source) RS-485 Modbus RTU HART 7 (Optional)
Weight	Aluminium enclosure: ATEX/IECEx: 1kg (2.2 lbs) UL: 1.5 kg (3.31 lbs) Stainless Steel Enclosure: ATEX/IECEx: 3.1 kg (6.8 lbs) UL: 3.5 kg (7.72 lbs)
Enclosure Material	ADC 12 aluminium alloy or 316 stainless steel
Relay	Alarm 1, Alarm 2, Fault (SPDT Contacts. Rated 1A, 24Vdc)
Sounder Out	High Side Switch (24V nominal, 12V minimum, 700mA maximum load)
Operating Temperature	ATEX/IECEx: -40°C to +70°C (-40°F to 158°F) UL: -40°C to +60°C (-40°F to 140°F)
Humidity	0 to 95% RH, non-condensing Contact Crowcon for sensor operating humidity range.
Repeatability	+/- 2% FSD
Zero drift	+/- 2% FSD per year maximum
Ingress protection	IP65/66, EN 60529
Hazloc Standards & Approvals

Zone 1 and Zone 2 or Zone 21 and Zone 22

Aluminium:

Ex II 2 G Ex db IIC T6 Gb Tamb: -40°C≤Ta≤70 °C

Ex II 2 D Ex tb IIIC T80°C Db

Ex db IIC T6 Gb Tamb: -40°C≤Ta≤70 °C

Ex tb IIIC T80°C Db

Stainless Steel:

Ex II 2 G Ex db IIC T3 Gb Tamb: -40°C≤Ta≤70 °C

Ex II 2 G Ex db IIC T4 Gb Tamb: -40°C≤Ta≤50°C

Ex II 2 D Ex tb IIIC T80°C Db

Ex db IIC T3 Gb Tamb: -40°C≤Ta≤70°C

Ex db IIC T4 Gb Tamb: -40°C≤Ta≤50°C

Ex tb IIIC T80°C Db

UL: UL 1203

-40°C≤Ta≤60 °C

Class I, Division 1, Groups B, C, D T6

Class II Division 1, Groups E, F, G T6

ApprovalsUL, IECEx, ATEX, CE, INMETRO, ECAS, PESO, CNEx, UC, CCSA TA, MEDEMC ComplianceEN 50270, EN IEC 61326-1, EN 55011, CISPR 11, EN 61000-4ZonesCertified for use in Zone 1 and Zone 2 areasWarranty

2 years on transmitter

5 years on MPS flammable and O2 Long Life sensor

2 years on IR flammable sensors

Refer to GEN067 – Warranty Periods

for other sensors

Xgard Bright Gases	Sensor type	Gas range	Temp range °C
Flammable gases (Tested for Methane, Butane, Ethane, Ethylene, Hydrogen, LPG, Pentane, Propane)	MPS	0-100% LEL	-40 to +75
Butane (C₄H₁₀)	Infrared	0-100% LEL	-40 to +60
Hydrogen (H₂)	Catalytic	0-100% LEL	-40 to +70
LPG	Catalytic Infrared	0-100% LEL	-40 to +70 -40 to +60
Methane (CH₄)	Catalytic Infrared	0-100% LEL 0-100% LEL	-40 to +70 -40 to +60
Pentane (C₅H₁₂)	Catalytic Infrared	0-100% LEL 0-100% LEL	-40 to +70 -40 to +60
Propane (C₃H₈)	Catalytic Infrared***	0-100% LEL 0-100% LEL	-40 to +70 -40 to +60

Carbon Monoxide (CO)	Electrochemical	0-25, 50, 100, 200, 250, 300, 1000, 2000 ppm	-30 to +50
Hydrogen Sulphide (H₂S)	Electrochemical	25, 50, 100, 200 ppm	-40 to +50
Oxygen (O₂) Long Life (Lead free)	Electrochemical	0-25% vol	-40 to +60
Oxygen (O₂)	Electrochemical	0-25% vol	-20 to +50
Carbon Dioxide (CO₂)	Infrared	0-5% vol	-40 to +60

Xsafe-Bright Gases	Sensor type	Gas range	Temp range °C
Flammable gases*	MPS	0-100% LEL	-40 to +75
Ammonia (NH3)	Electrochemical	0-50, 100 ppm	-40 to +50
Chlorine (CL₂)	Electrochemical	0-5, 10 ppm	-20 to +50
Hydrogen Cyanide (HCN)	Electrochemical	0-25 ppm	-40 to +40
Hydrogen Peroxide (H₂O₂)	Electrochemical	0-5 ppm	-20 to +50
Sulphur Dioxide (SO₂)	Electrochemical	0-10 ppm	-20 to +50
VOC*	PID	0-1000 ppm	-20 to +60
Ozone (O₃)	Electrochemical	0-1 ppm	-20 to +40
Carbon Dioxide (CO₂)	Infrared	0-5% vol	-40 to +60

Crowcon XgardIQ

XgardIQ is an intelligent and versatile fixed detector and transmitter. Its remote sensor and universal transmitter means you have access to Crowcon’s full range of sensor technologies and improved detection. With its sensor range selection capabilities it means users can set the full-scale range of the sensor according to specific location requirements.

Available fitted with a variety of sensors for fixed flammable, toxic, oxygen or H₂S gas detection, this SIL2 certified detector is easy and safe to use, with OLED display for easy visibility of reading even in dark locations and a +Ve safety indicator to quickly confirm the detector is operating soundly at a glance.

The XgardIQ is optionally available with Alarm and Fault relays and HART communications.

Size	H278 x W140 x D89mm (10.9 x 5.5 x 3.5 in)
Weight	4.1Kg (9lbs)
Enclosure material	316 stainless steel
Ingress protection	IP66
Connection	Three M20 or ½”NPT cable gland entries.Certified, removable plugs are fitted to left-hand and lower righthand entries
Power	14-30 VDC. <4W
Display	Main display – OLED 128 x 64 pixels, yellow text on black background Indicators – Amber, Red and Green LED’s for detector status; Blue +ve Safety LED
Electrical output	4-20mA current sink or source (Auto-Sense or manual selection); warning and fault signals are configurable. NAMUR NE 43 compliant RS-485 Modbus RTU HART 7 over 4-20mA signal and via local I.S. test points (optional) Relays (optional) Alarm 1, Alarm 2, Fault SPCO contacts rated 5A, 230Vac Relay configuration options Energised or de-energised Latching or non-latching Rising or falling Configurable On and Off delays on alarm relays.
Event logging	Records alarm, fault and maintenance events. Events can be viewed on-screen and downloaded to a PC.
Operating temperature	ATEX/IECEx: -40°C to +75°C (-40°F to 167°F) FM: -40°C to +70°C (-40°F to 158°F) Refer to sensor datasheet for sensor operating temperature
Humidity	0 to 95% RH non-condensing†
Repeatability	+/- 2% FSD
Zero drift	+/- 2% FSD per year maximum
Response time	Sensor dependant: contact Crowcon for specific sensor data.

Hazloc standard & Approvals	Zone 1 and Zone 2 or Zone 21 and Zone 22 ATEX: EN IEC 60079-0, EN 60079-1, EN 60079-11 Ex II 2 G Ex db ia IIC T4 Gb IECEx: IEC 60079-0, IEC 60079-1, IEC 60079-11 Ex db ia IIC T4 Gb FM Approval: US: ANSI/UL 60079-0, ANSI/UL 60079-1, ANSI/UL 60079-11 Class 1, Zone 1, AEx db ia IIC T4 Gb Canada: CSA C22.2 No. 60079-0, CSA C22.2 No. 60079-1, cSa C22.2 No. 60079-11 Ex db ia IIC T4 Gb
Approvals	_CFM_US (Methane (Cat), Propane (Cat) and H2 S HT), IECEx, ATEX, CE, INMETRO, ECAS-Ex, PESO, CNEx
Performance	ANSI/FM/UL and EN 60079-29-1, ANSI/FM/UL 62990-1, EN 50271, EN 50104, EN 45544, UL/ANSI/ISA 92.00.01, FM 6320, FM 6340
Functional safety	SIL2 Certified, IEC 61508, EN 50402
EMC Compliance	EN 50270, EN IEC 61326-1, EN 55011, CISPR 11, EN 61000-4

† Note: sensor operating temperature and humidity limits vary widely.** FM Approval is available for methane and propane pellistor sensors (part number XIQ-FA, XIQ-FB, XIQ-FC and XIQ-FD) and high temperature H2S sensor (part number XIQ-FT) versions only. FM Approved transmitters are limited to +70°C, FM Approved sensors may be used up to + 75°C.

Gas	Sensor Type	Gas Range	Temperature Range
Ammonia (NH₃)	Electrochemical	0-50 ppm, 0-100 ppm, 0-1000 ppm	-20 to +40°C
Carbon Monoxide (CO)	Electrochemical	0-250 ppm, 0-500 ppm, 0-1000 ppm	-30 to +50°C
Chlorine (Cl₂)	Electrochemical	0-5 ppm, 0-10 ppm, 0-20 ppm	-20°C to 50°C
Hydrogen Fluoride (HF)	Electrochemical	0-10 ppm	+5 to +40°C
Hydrogen Sulphide (H₂S)	Electrochemical	0-100ppm	-30°C to 70°C
Hydrogen Sulphide (H₂S)	Electrochemical	0-25 ppm, 0-50 ppm	-40°C to 50°C
Hydrogen Sulphide (H₂S)	Electrochemical	0-100 ppm, 0-200 ppm	-30°C to 50°C
Oxygen (O₂)	Electrochemical	0-25% Vol.	-20°C to 50°C
Ozone (O₃)	Electrochemical	0-1 ppm	-20°C to 40°C
Sulphur Dioxide (SO₂)	Electrochemical	0-10 ppm, 0-100 ppm	-30 to +50°C
Flammable Gases*	MEMS	0-100% LEL	-40°C to 75°C

Acetylene (C₂H₂)	Catalytic	0-100% LEL	-20°C to 60°C
Benzene (C₆H₆)	Catalytic	0-100% LEL	-20°C to 60°C
Ethanol (C₂H₆O)	Infra-Red	0-100% LEL	10°C to 50°C
Heptane (C₇H₁₆)	Catalytic	0-100% LEL	-20°C to 60°C
Hydrogen (H₂)	Catalytic	0-100% LEL	-40°C to 75°C
LPG	Catalytic Infra-Red	0-100% LEL	-20°C to 70°C -20°C to 55°C
Methane (CH₄)	Catalytic Infra-Red	0-100% LEL	-40°C to 75°C -20°C to 55°C
Pentane (C₅H₁₂)	Catalytic Infra-Red	0-100% LEL	-40°C to 75°C -20°C to 55°C
Propane (C₃H₈)	Catalytic Infra-Red	0-100% LEL	-40°C to 75°C -20°C to 55°C