PH-2-70M

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Specialized Sensors comprise dedicated instruments that are used to measure a variety of physical quantities in both research and industrial applications. As technology advances, more specialized sensors are being created for different applications and probes. PH-2-70M is a specialized sensor created for measuring CO2 concentrations in air and other gases. This article discusses the application fields and working principle of PH-2-70M.

The PH-2-70M is suitable for monitoring carbon dioxide concentration in spaces such as conference rooms, laboratories, classrooms and the interior of vehicles, as well as for measuring CO2 concentration for adjusting the amount of fresh air, for example, in plant nurseries. In addition, in the medical field, PH-2-70M is ideal for demonstrating and evaluating the efficiency of medical ventilators. The PH-2-70M is designed for long-term use and features a low power consumption design, making it suitable for continuous operation in unattended environments.

The PH-2-70M features an internal humidity and temperature compensation system, which allows it to accurately measure carbon dioxide concentrations in the presence of varying conditions. This sensor utilizes a highly sensitive and stable infrared type carbon dioxide sensor module. The unique design of the sensor module allows for a wide measurement range, from 0.1% to 10%. The sensor produces an output signal of 0 to 10 VDC, which is proportional to the CO2 concentrations.

The working principle of PH-2-70M is based on the fact that carbon dioxide has a strong absorption characteristic when incident on the strong infrared light. When the infrared light is irradiated onto the target gas and the transmitted light amount is detected by a pyroelectric detector, the amount of the incident light diminished by the absorption is proportional to the gas concentration. The proportionality coefficient is determined from the calibration data. The working principle can be simplified to its simplest form as follows:

First Step: When beams of infrared light is directed into the sample to measure the concentration of CO2, the incident light is partially absorbed by the CO2 molecules. The remaining light is then detected by the pyroelectric detector.

Second Step: As the level of CO2 concentration changes, the amount of light that is absorbed and the amount of light detected by the pyroelectric detector also changes. This change of light intensity is then converted into an electrical signal.

Third Step: This signal is then compared with a linear conversion curve and the output voltage is calibrated to compensate for changes in atmospheric temperature and humidity.

In addition, PH-2-70M also has an automated calibration and self-attuning mechanism to ensure accuracy of the results. The intelligent features of the sensors allow it to constantly recalibrate itself in order to minimize error in the measurements. The calibration process includes measuring the reference CO2 concentration (in ppm) and then adjusting the gain factor accordingly. The self-attuning algorithm adjusts the measurement range based on the measured samples and ensures that the sensor will always operate at the correct level.

In summary, PH-2-70M is a specialized sensor designed for measuring CO2 concentration in air and other gases. Its wide measurement range, low power consumption, automated calibration and self-attuning mechanisms allow for accurate and reliable results. The sensor can be used in areas such as conference rooms, laboratories, classrooms, vehicle interiors and plant nurseries as well as in medical ventilator demonstrations and evaluations. As technology advances, more specialized sensors are being created for different applications and probes. Thus, PH-2-70M is an important step forward in the development of specialized sensors.

The specific data is subject to PDF, and the above content is for reference