Comet U4440 – Temperature, Humidity, CO2 and Atmospheric Pressure Data Logger with Built-in Sensors

• A solution for every need, every budget – economy and premium dataloggers
• High quality, accurate and stable sensors
• Built-in battery operated
• Built-in printer

Datalogger is designed to record temperature, humidity, atmospheric pressure, and CO2. In case of exceeded set limits alarms are indicated by LED, LCD, and acoustically by built-in beeper. The recording is performed in non-volatile electronic memory. The data can be transferred to a PC via USB-C. Recorder includes a Traceable calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.

Compact thermometer – hygrometer – pressure gauge – CO2 concentration meter

This model is designed to measure temperature, relative humidity, dew-point temperature, barometric pressure and the concentration of CO2 in the air by internal sensors. Barometric pressure can be measured as absolute or recalculated to sea level. No additional probes or sensors can be connected. It is characterized by a simple and compact design and a relatively long response in the measured quantities, compare to model with external probes. The sensors are located under the grid on the front and side of the unit.

The device is suitable for measuring in places where there is no rapid change in temperature or relative humidity, and there is no condensation of water vapours. The device is placed directly in the measured space. Accupack in the device can be charged. As the internal battery creates a parasitic heat during the charging period, the measurement accuracy may be affected by up to 1 ºC.

In battery mode, this model has a significantly shorter battery life than models without CO2 concentration measurement. For this reason, the measurement of CO2 concentration does not occur as often as the measurement of other variables. By default, this is 2 minutes with the option of extending up to 10 minutes (option available in the COMET Vision software).

We recommend that calibration of this device in the laboratory be carried out with sufficient airflow (at least 1 m/s), but the reading should be carried out only after a thorough settling, which may take up to 4 hours. Due to low IP20 protection, this device is not suitable for dusty or water-borne areas.