Available on Request Compare Smart Sensor Smart Sensor Multi-Gas Monitor, AS8900 Smart Sensor Multi-Gas Monitor AS8900 has very high-precision and higher stability. Detection of Gas: Oxygen/ Hydrothion/ Carbon Monoxide/ Combustible. Measuring Range: 0-30percent VOL (Oxygen), 0-999 PPM (Carbon Monoxide), 0-500 PPM (Hydrogen... Available on Request Compare Quick view Qty in Cart: 0 Price: Out of Stock Subtotal: Available on Request