Carbon dioxide and pressure TSM400-4-CP is a multi parameters sensor that supports MODBUS RTU protocol over the RS-485 interface. The sensor measures barometric pressure and CO2 concentration.
MODBUS device integrates an advanced non-dispersive infrared sensing element (NDIR) for CO2 measurements. NDIR is recently the most popular principle for CO2 concentration measuring. The principle is based on the absorption of infra-red (IR) light with specific wavelengths by CO2 molecules.
The CO2sensing element is realized with built-in humidity and temperature for better accuracy.
Self-calibration is available for carbon dioxide measurements. It is done if the sensor is left in fresh (around 400 ppm CO2 concentration ) air.
The basic sensing element for barometric pressure is factory calibrated and it does not require any lifetime recalibration.
The sensor TSH400-4-CP is housed in a slim plastic enclosure. The bottom part of the enclosure is suitable for installation on standard flush-mounted/cavity wall boxes with a maximum installation opening of 61 mm.
Features - LED indicator for status of communication.
- Long-term stability based on digital signal processing.
- Self-calibration on fresh air for CO2 measurements.
- Changeable communication parameters.
- Non-volatile memory for all settings.
- Firmware update via the interface.
Applications - Indoor air quality (IAQ).
- CO2 storage facilities leakage control.
- Smart ventilation systems.
- Restaurants and breweries CO2 level monitoring.
