MSA 10178568 Altair 4XR Multigas Detector: LEL & O2, Charcoal case, North American Charger: Amazon.com: Tools & Home Improvement
MSA 10178557 ALTAIR 4XR Multigas Detector - (O2, H2S, CO), Color: Charcoal, Portable Gas Monitor, Durable, Handheld, UL/CSA Approval, Includes Instrument Only - - Amazon.com
4-Gas Calibration Blend for MSA Gas Detectors Altair 4, Altair 4X, Altair 4XR, Altair 5, Altair 5X, Sirius (34L): Amazon.com: Tools & Home Improvement
4-Gas Calibration Blend for MSA Gas Detectors Altair 4, Altair 4X, Altair 4XR, Altair 5, Altair 5X, Sirius (34L): Amazon.com: Tools & Home Improvement
MSA Altair 4X Multigas Detector 10107602 For LEL, Oxygen, Hydrogen Sulfide And Carbon Monoxide With Motion Alert
MSA Combustible Gases, Oxygen And Carbon Monoxide ALTAIR(R) 4X Gas Monitor With Rechargeable Battery And Motion Alert: Amazon.com: Tools & Home Improvement