The Rotronic CL11 is a desktop indoor air quality meter that simultaneously measures and records CO2, humidity, and temperature. It calculates dew point and wet bulb temperature. Equipped with field-tested ROTRONIC HYGROMER IN-1 humidity sensor and NDIR CO2 sensor with automatic baseline correction (ABC).

Measurement ranges: CO2 0-5000 ppm (accuracy ±30 ppm ±5% of measured value), humidity 0-100% RH (accuracy <2.5% RH 10-90% RH), temperature -20°C to 60°C (accuracy ±0.3°C). Memory capacity 40,000 data points. Adjustable audible CO2 alarm, real-time clock with backup battery, optional external temperature probe.

Includes HW4-Light software for configuration and data download. The software allows data to be downloaded, saved, and analyzed. IP30 protection rating. The instrument offers unbeatable value for money with its field-tested sensor technology.

Key Features

• CO2: NDIR sensor with ABC, 0-5000 ppm range
• Humidity: Hygromer IN-1 sensor, 0-100% RH range
• Temperature: -20°C to 60°C range
• 40,000 data point memory
• Max/min/avg value display
• Adjustable audible CO2 alarm
• Real-time clock with backup battery
• Dew point and wet bulb calculation
• HW4-Light software included

Applications

• Office building IAQ monitoring
• School classroom ventilation assessment
• HVAC system performance verification
• Green building certification
• Indoor environmental quality studies