Honeywell BW™ Clip maintenance-free Hydrogen Sulfide (Low - 10 ppm / High - 15 ppm) Single Gas Detector is the most reliable, user-friendly, cost-effective way to keep workers safe and operations compliant. It delivers two years of protection with no need for calibration, sensor replacement, battery replacement or battery charging. That means great reliability and no downtime. Compact, lightweight and easy to use with one-button operation and no extensive training. Compatible with the IntelliDoX instrument management system for extremely quick bump tests, bump test tracking, adjustable set points and more.