The IRmax is a compact, rugged, and low-power infrared gas detector. It is primarily designed for detecting potentially flammable hydrocarbon gases and vapors, such as methane, propane, and butane.
Fast Response
Responds within just 4 seconds, providing rapid and accurate detection of hydrocarbon gas concentrations.
High Reliability
Designed and certified to IEC 61508 SIL 2, with proven operational safety tested in the harshest offshore environments.
Wide Operating Temperature Range
Operates reliably from -40 °C to +75 °C.
Stable Performance & Contamination Monitoring
Maintains accurate gas detection even when the optical surface is up to 90% obscured by salt or other contaminants. The IRmax display module monitors contamination levels and triggers a fault signal at the 90% threshold.
Third-Party Tested
Independently tested and certified for long-term performance under extreme conditions, including cold, heat, humidity, and salt exposure.
Compact Size
Significantly smaller than conventional infrared detectors, saving space and simplifying installation.
Flexible Mounting Options
Supports wall mounting, installation on a 2-inch (50 mm) pipe, or connection to an additional junction box via optional mounting accessories.
Multiple Communication Options
Features a 4-20 mA analog output and can communicate via RS485 Modbus or HART® protocols for integration with various control systems.
Maintenance-Free Operation
Utilizes a precise testing and calculation system to ensure long-term operational reliability.
Remote Calibration
The IR display module allows for monitoring, zeroing, and calibration from a remote location up to 30 meters away, enabling safe calibration without direct access to the detector.
Hand-held Intrinsically Safe Calibrator
If a display module is not installed on-site, the IRmax can be calibrated using a hand-held intrinsically safe calibrator connected via a safety barrier.
STAY-CLIR™ Optical Surface
Incorporates patented Crowcon optical coating technology, which minimizes the accumulation of dust and other contaminants on the optical window.
Low Power Consumption
Consumes only 1W, as it does not require optical surface heating. This enables operation using low-power supplies or battery sources.
Remote IR Display Module
A separate display module enables monitoring, debugging, and calibration of the IRmax via a connecting cable, eliminating the need for ladders or scaffolding and simplifying maintenance.
Minimal Routine Maintenance
The IRmax automatically monitors lens contamination and requires only occasional functional gas testing, significantly reducing lifetime maintenance costs.
| Name | Dual-wavelength Infrared Display-type Carbon Oxide & Hydrocarbon Gas Detector |
| Housing Material | 316 Stainless Steel |
| Specifications | IRmax: 158L x 75H x 57D mm (6.2 x 2.9 x 2.3 ins)IRmax with display: 230L x 75H x 57D mm (9 x 2.9 x 2.3 ins)IRmax with safety cage: 261L x 75H x 57D mm (10.2 x 2.9 x 2.3 ins)Remote display module: 60L x 54H x 48D mm (2.3 x 2.1 x 1.9 ins) |
| Weight | IRmax: 1.58Kg (3.5lbs)IRmax with display: 2kg (4.4lbs)IRmax with safety cage: 2.4kg (5.3lbs)Remote display module: 0.2kg (0.4lbs) |
| Protection Class | IP66 |
| Cable Interface | One M20 or ½" NPT interface |
| Power Supply | 12-30Vdc. |
| Signal Output | 4-20mA Active or passive2mA Mirror contamination alarm (75% contamination area)0mA Fault signal (90% contamination area)RS-485 Modbus (optional)HART 7 (optional) |
| Display Module | 4-digit backlight LCD displayKeys can be deactivated (per user requirement)Key beepConnection terminal for HART communication device (optional)Red light: Gas detectionYellow light: IRmax faultGreen light: NormalDisplay content: Gas concentration, contamination degree, supply voltage and current signalOperation content: Zeroing, calibration, forced output, correcting zero point mA signal, correcting full-scale mA signal |
| Operating Temperature | -40°C ~ +75°C (-40°F ~ 167°F) |
| Ambient Humidity | 0 ~ 100% RH Non-condensing |
| Operating Pressure | +/-10% Atmospheric pressure |
| Repeatability | +/-2% |
| Zero Drift | Max +/-2% per year |
| Response Time | T90 < 4s |
| Executive Standard | EN60079-29-1 |
| Safety Standard | IEC61508 SIL 2 |
| Certification | ATEX & IECExIRmax: Ex II 2 G Exd IIC T6 Gb (Tamb -40 to +50°C), T4 (Tamb -40 to +75°C)IRmax (with infrared display): Ex II 2 G Exd ia IIC T4 Gb (Tamb -40 to +75°C) |
| Operating Area | Zone 1, Zone 2 |
| EMC Standard | EN50270:2006, FCC CFR47 Part 15B, ICES-003 |
| Accuracy | +/-2% of reading |
| Linearity | +/-3% of full scale |
| Detected Gas Type | Range |
| Acetone (C₃H₆O) | 0-100% LEL |
| Butane (C₄H₁₀) | 0-100% LEL |
| Ethanol (C₂H₅OH) | 0-100% LEL |
| Ethylene (C₂H₄) | 0-100% LEL |
| Ethyl Acetate (CH₃COOC₂H₅) | 0-100% LEL |
| Heptane (C₇H₁₆) | 0-100% LEL |
| n-Hexane (C₆H₁₄) | 0-100% LEL |
| Liquefied Petroleum Gas (LPG) | 0-100% LEL |
| Methane (CH₄) | 0-100% LEL |
| Methanol (CH₃OH) | 0-100% LEL |
| Pentane (C₅H₁₂) | 0-100% LEL |
| Propane (C₃H₈) | 0-100% LEL |
| Tetrahydrofuran | 0-100% LEL |
| Toluene (C₇H₈) | 0-100% LEL |
