Sensor Description:

The DT015 pressure sensor measures gas pressure in two ways: When using the MultiLog data logger the DT015 will show an absolute measurement of air pressure. When measured at sea level, the sensor will measure 1013 mBar. However, when using the Handy-log data logger, the DT015 will measure air pressure relative to sea level, resulting in a measurement of 0 mBar at that height. The DT015 uses Fourier Systems Egg-Shaped sensor case.

The main sensing unit inside the DT015 is composed of a pressure sensitive membrane, and a flexible resistor attached to it. This flexible resistor changes it’s resistance when it bends. When the air pressure drops or increases, the resistor’s resistance changes, and according to Ohm’s law so does the voltage measured on it. This voltage is then adjusted a range of 0-5 Volts, accepted by the analog-digital converter of the Data-Logger. The proper result is then recorded into the Logger’s memory.

The DT015 is fully calibrated, and no further calibration is needed. However, it is possible to change the range of the sensor from the absolute range of 150¸ 1150 mBar to the relative range of -900¸ 200 mBar using the calibration dialog box in the DB-Lab software. For further documentation read the DB-Lab section in your Data-Logger manual.

The DT015 has several uses. It uses mostly as a pressure sensor for experiments in Biology and Chemistry. It also uses as an altimeter, measuring height. The DT015 also uses as a barometer for various meteorological measurements. The following graph is an experiment of photosynthesis. The DT015 is used to measure the oxygen output of the plant.