Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger - Measures Carbon Dioxide (CO2) , Temperature, Humidity, Dew Point, and Wet Bulb

Features:

• Checks for Carbon Dioxide (CO2) concentrations
• Calculates statistical weighted averages of TWA (8 hour time weighted average) and STEL (15 minute short term exposure limit)
• Maintenance free NDIR (non-dispersive infrared) CO2 sensor
• Measurement ranges:
• CO2: 0 to 5,000ppm
• Temperature: -14 to 140°F (-10 to 60°C)
• Humidity: 0.0 to 99.9%
• User programmable audible alarm
• Backlit triple LCD display
• Built-in RS-232 interface for capturing readings on PC
• Data acquisition software and cable included to record and document CO2, Humidity and Temperature data
• Optional 33% and 75% RH calibration bottles
• Complete with software and cable, 4 AA batteries, and carrying case