Industrial Scientific VTS K1232111101 Multi Gas Detector, Carbon Monoxide Hydrogen Sulfide LEL Oxygen Pentane G0966016 Flow Rate 20 gpm Max Flow Rate 20 gpm Max They include a housing head and a replaceable filter element and are designed for high flow rates and systems pressurized at 1 Vibration Application Confined Space Includes Test Gas No Sub Brand Industrial Scientific Interchangeable Sensors No Country of Origin United States Electrochemical Operating Humidity Maximum 95 % Operating Temperature Minimum 4 Degrees F Temperature Code T4 Number of Records Stored 60 Alarm Events Display Type Digital Includes Probe No Operating Humidity Minimum 15 % Operating Temperature Maximum 122 Degrees F Hazardous Location Specification Class II