MACURCO MP100-O2-25 Single Gas Monitor, 2-7/16" W, 1-5/16" D Single Gas Detector, Gas Type HCL, Detects Hydrogen Chloride, Sensor Range 0 to 15 ppm, Resolution 0.1 ppm, Housing Color Black, Operating Temp. Range -4 Degrees to 122 Degrees F, Alarm Setting Adjustable, Alarm Type Audible, Visual, Vibrating, Battery Type Lithium, Battery Life 2 yr., Display LCD, Interchangeable Sensors No, Height 3-15/32 In., Width 2-7/16 In., Depth 1-19/64 In., Standards Compliant with EMC, 2004/108/EC, UL/cUL, Class I, Group A, B, C, D, Class II, Group E,F,G, Class III, T