Crowcon IREX Gas Detector (Infra Red)
The IREX gas detector operates from control systems designed solely for use with pellistor-based gas detectors and produces a mV Wheatstone Bridge type signal and operates from as little as 2.9Vdc.
IREX fixed gas detectors replace old pellistor heads by simply mounting on the original junction box and connecting to the original cable.
The IREX concept enables upgrades to dual-wavelength IR gas detector technology without incurring the very significant costs associated with replacing the control system and re-installation.
IREX fixed gas detector consume less than 1W of power ensuring compatibility with a wide range of control systems and are dependable with T90 response times of less than 4 seconds, providing a rapid indication of hydrocarbon gas hazards.
The IREX fixed gas detector is also water and dust resistant to IP66. Crowcon IREX is a certified Flameproof (Exd) detector suitable for use in ATEX Zone 1 or Zone 2 hazardous areas.
Crowcon IREX Fixed Gas Detector – Key Features
- IR Technology – The Crowcon IREX uses IR technology instead of pellistor gas sensors which require less maintenance, don’t require oxygen, less likely to burn out and don’t need to be operated behind a sinter (flame arrestor)
- Low Power Consumption – The IREX consumes less than 1W of power
- Reliability – Independently tested for reliability and performance in harsh offshore conditions by Micropack Engineering Ltd and approved to EN60079-29-1
- Maintenance – No adjustments made to the detector all are performed at the control panel and tests can be applied remotely via a tube to the standard weather cover
Crowcon IREX Bump Testing And Calibration
Routine bump testing is recommended for the range of Crowcon fixed gas detectors prior to each use. Bump testing is a brief application of a gas to the sensor to invoke a prescribed reaction, ensuring the gas detector reacts as expected.
Bump testing provides a quick, easy and direct method of verifying gas detectors are performing as required and takes a lot less time than ‘zeroing’ the device.
The bump test is widely accepted as a suitable method of testing gas detection equipment.
Crowcon IREX Fixed Gas Detector – Product Specification
|Size||120 x 55 x 130mm (1.7 x 5.1 x 3.3 inches) (with spigot gland)|
|Weight||1.5kg (10.8 oz)|
|Enclosure Material||316 Stainless Steel|
|Connection||Supplied either with M20 spigot gland for installation into existing junction boxes or with one M20 cable gland entry|
|Operating Voltage and Current||3Vdc nominal (2.9-3.2Vdc), 260mA nominal (260-280mA)|
|Electrical Output||3-wire mV (Wheatstone) Bridge. Typically 10-20mV per % vol. methane|
|Operating Temperature||-40 to +75ºC|
|Humidity||0-100% RH non-condensing|
|Repeatability||+/- 2% FSD|
|Zero Drift||+/- 2% FSD per year maximum|
|Response Time||T-90 < 4 seconds|
|Performance||Tested in accordance with EN60079-29-1|
|Functional Safety||Validation to IEC61508 SIL 2|
|Approvals||II 2 G Exd IIB + H2 T6 (-40 to +50ºC) T4 (-40 to +75ºC) ATEX & IECEx|
|EMC Compliance||EN 50270, FCC, ICES-003|
Crowcon IREX Fixed Gas Detector – Gases And Ranges Detected
|Methane (CH4)||0-20, 50, 100% LEL|
|Acetone (C3H6O)||0-100% LEL|
|Butane (C4H10)||0-100% LEL|
|Ethanol (C2H5OH)||0-100% LEL|
|Ethylene (C2H4)||0-100% LEL|
|Ethyl Acetate (C4H8O2)||0-100% LEL|
|Heptane (C7H16)||0-100% LEL|
|Hexane (C6H14)||0-100% LEL|
|Octane (C8H18)||0-100% LEL|
|Methanol (CH3OH)||0-100% LEL|
|Pentane (C5H12)||0-100% LEL|
|Petrol Vapour||0-100% LEL|
|Propane (C3H8)||0-100% LEL|
|Propylene (C3H6)||0-100% LEL|
|THF (Tetrahydrofuran) (C4H8O)||0-100% LEL|
|Xylene (C8H10)||0-100% LEL|
|Methyl Acetate (C3H6O2)||0-100% LEL|
|Propylacetate (C5H10O2)||0-100% LEL|
|Hexene (C6H12)||0-100% LEL|
|Paraxylene (C8H10)||0-100% LEL|
|Ethane (C2H6)||0-100% LEL|
|Ethylene Dichloride (EDC)||0-100% LEL|
|Cyclohexane (C6H12)||0-100% LEL|
|Butadiene (C4H6)||0-100% LEL|
|Toluene (C7H8)||0-100% LEL|
|Butene (C4H8)||0-100% LEL|
|Hexane (C6H14)||0-100% LEL|
|Styrene (C8H8)||0-50% LEL|
Crowcon IREX – Hazardous Area ATEX Certified Gas Detector
Hazardous Area Classification :
II 2 G Exd IIB + H2 T6 (-40 to +50°C) T4 (-40 to +75°C) ATEX & IECEx
Visit hazardous area gas detectors for explosion and flameproof gas monitoring and detection instruments with certification for potentially explosive atmospheres, including Zone 1 and Zone 2 (according to ATEX and IECEx) and Class/Division categories (according to North American standards).
T&D provide competitive prices and delivery for all Crowcon Gas Detectors, including the Crowcon IREX.
➡ Did you know? Crowcon fixed gas detectors protect plant; portable gas detectors protect people.