The Tango™ TX1 Single Gas Monitor from Industrial Scientific is a gas monitor that contains two identical sensors for the detection of the same gas. A three-year runtime and DualSense® Technology increases worker safety, regardless of bump test frequency, while reducing overall maintenance costs. The Tango detects CO, H2S, SO2, and NO2. Its sensor technology includes two of the same type sensor for the detection of the same gas, making users 85 times safer than they would be using a typical single-gas monitor. It is powered by one replaceable 2/3 AA lithium battery that will power it continuously for three years.