MSA Safety 10211185 ALTAIR 4XR Personal Gas Detector for Oxygen, LEL (Pentane), H2S, Carbon Monoxide Detection Audible

This gas detector is a handheld instrument designed to monitor oxygen, combustible vapour, hydrogen sulphide and carbon monoxide in hazardous settings. Engineered for portable safety use, it delivers continuous, real-time readings on an LCD and provides both audible and visual warnings to alert personnel to dangerous atmospheres. The unit is battery powered for field operation and has ATEX hazardous area certification for use in explosive environments.

• Lithium-polymer power source delivers up to 24h operation per charge
• Detects O2, LEL (pentane), H2S and CO for multi-gas protection
• Audible alarm provides immediate audible hazard notification
• Visual alarm supplies clear, instant status indication
• Operates reliably between -40°C and 60°C for extreme climates
• Compact 0.23 kg handheld form supports easy carriage

• Suitable for confined-space entry monitoring of gas levels
• Used for routine industrial safety checks on plant equipment
• Ideal for maintenance teams performing ventilation assessments
• Can be used for site safety during hot-work operations
• Used with inspection rounds in ATEX-classified zones

The internal lithium-polymer cell supports continuous monitoring for 24h per full charge and powers all alarms and the LCD display.

It uses a combination of an audible alarm and a visual alarm to signal exceedance of preset alarm thresholds in real time.

Yes, it functions down to -40°C, maintaining sensor operation and display readability within that lower limit.

It carries ATEX hazardous area certification, permitting operation in locations classified under that directive.

This product is sold with the manufacturer’s original calibration date. We cannot guarantee the calibration will still be valid at the time of purchase.