Both the BW Flex4 and BW Ultra are rated IP66/68 for dust and water ingress protection, so you can choose the right model based on how many gases your site needs to monitor.

BW Flex4

Small, lightweight, and wearable, the BW Flex4 is built for extended shifts. It detects 4 gases (O₂, LEL, H₂S, CO) and offers 2 months of continuous battery runtime on a single charge, extending to up to 4 months if powered off at the end of each shift. That means no daily charging and no unexpected downtime.

BW Ultra

The BW Ultra is a hand-held five-gas detector purpose-built for sampling and monitoring confined spaces before and during entry. It detects O₂, LEL, H₂S, and CO, plus a selectable 5th sensor (e.g. VOC) for an added layer of protection. A built-in sampling pump extends its reach up to 23m, while Bluetooth connectivity allow for remote monitoring and quick instrument management. The large, easy-to-view display makes readings simple to check on the go, with approximately 18 hours of battery runtime typical (14 hours with a PID or IR sensor).

Suited for

Any confined space entry jobs where gases may be present. Choose the BW Flex4 for standard 4-gas monitoring, or the BW Ultra where a 5th gas, such as VOC, needs to be monitored.