Extech CO270 Air Quality Monitor - CO2, Temperature, Humidity, TVOC

Indoor air quality directly affects comfort, productivity, and health, yet most spaces lack continuous monitoring of key parameters. The Extech CO270 addresses this by measuring CO2, temperature, humidity, and TVOC simultaneously, providing a complete picture of your environment.

Who is it for

Facility managers, HVAC technicians, safety officers, and anyone responsible for maintaining healthy indoor environments in offices, schools, hospitals, or industrial settings. It is also suitable for homeowners concerned about air quality.

Main features

• Simultaneous measurement of CO2 (0 to 9999 ppm), temperature (-10 to 60°C), humidity (0.1 to 99.9% RH), and TVOC (0 to 9.999 ppm)
• NDIR CO2 sensor and MOS TVOC sensor for reliable readings
• Large LCD with backlight displays all four parameters at once
• Audible CO2 alarm with user-settable threshold
• Data logging capacity of 32,000 points with USB PC connectivity
• Powered by included AC adapter with 4x AA battery backup

Specifications

• CO2 Measurement Range: 0 to 9999 ppm
• CO2 Accuracy: ±75 ppm + 5% of reading (0 to 2000 ppm); ±100 ppm + 7% of reading (>2000 ppm)
• CO2 Resolution: 1 ppm
• Temperature Measurement Range: -10 to 60°C (14 to 140°F)
• Temperature Accuracy: ±0.5°C (±0.9°F)
• Temperature Resolution: 0.1°C/°F
• Humidity Measurement Range: 0.1 to 99.9% RH
• Humidity Accuracy: ±3% RH (at 25°C, 10 to 90% RH); ±5% RH (at 25°C, <10% or >90% RH)
• Humidity Resolution: 0.1% RH
• TVOC Measurement Range: 0 to 9.999 ppm
• TVOC Resolution: 0.001 ppm
• CO2 Sensor Type: NDIR (Non-Dispersive Infrared)
• TVOC Sensor Type: Metal Oxide Semiconductor (MOS)
• Display Type: Large LCD with backlight
• Data Logging Capacity: 32,000 data points
• Alarm Function: Audible CO2 alarm (user-settable threshold)
• PC Connectivity: USB interface
• Power Source: AC adapter (included), 4x AA batteries (backup)
• Operating Conditions: 0 to 50°C (32 to 122°F), 0 to 95% RH (non-condensing)

Tips

Place the monitor at breathing height away from direct sunlight and vents for representative readings. Calibrate periodically according to the manufacturer's instructions to maintain accuracy. Use the data logging feature to track trends over time and identify ventilation issues.