The BW Clip Real Time 2 Year H2S Monitor is a lightweight and easy to handle single gas detector for hydrogen sulfide. Designed for a wide range of harsh environments and extreme temperatures, this H2S Monitor has the default alarm setpoints at 10 ppm to 15 ppm. BW Clip Real Time includes a real-time gas level display and the ability to calibrate the device. It provides two years maintenance-free operation: just turn on the device, and it runs continuously. There is no need for sensor replacement and battery charging or replacement.