Atmospheric Sensor

The MicroSet Atmospheric Sensor is a miniature weather station to use in studying how clocks and watches respond to changes in the environment. The sensor will measure three parameters: barometric pressure, temperature, and humidity. These are the factors most likely to effect clocks and watches. The Windows Interface software version 2.4 or 3.4 is required to make use of this sensor. These programs will record and display changes in the weather along with changes in the rate of your timepiece.

MicroSet still supports the original temperature sensor. In addition to these four weather sensors, MicroSet has been updated to add an additional measurement as another "sensor". It will measure the amplitude of swing of a pendulum at the same time as it measures the rate. To control the display of these five elements in the MicroSet graph, a sensor control panel has been created. Shown below, this panel will let you select which sensors are displayed at any time, what color is assigned to each sensor, and what the scaling values are for each sensor.

If you choose to have one of the sensor elements displayed in the MicroSet graph, additional controls are added to the MicroSet screen as well. These let you see the current values of each sensor at a glance, and allow you to adjust the display for maximum readability. This makes the graph wider than this web page. To see a screen shot of the full graph, click here.

To see an example of the atmospheric sensor in use, click here.

The specifications of the sensor are as follows:

Barometer
Range: 300 to 1100 millibar (9 to 32 inches of mercury)
Resolution .1 millibar (.01 inches of mercury)
Absolute accuracy from 750 to 1100 mbar: +/- 1.5 mbar (+/- .04 inches of mercury)
Relative accuracy from 750 to 1100 mbar: +/- 0.5 mbar (+/- .01 inches of mercury)
Display can be shown as millibars or inches of mercury

Temperature
Range: -10 to +60 degrees Centigrade
Resolution: .01 degrees Centigrade
Accuracy: +/- .8 degrees Centigrade
Accuracy is much greater over narrower range of room temperatures
Display can be shown as Centigrade or Fahrenheit
Readings can be trimmed if you have a more accurate reference

Humidity
Range: 1 to 99%
Resolution: 1%
Accuracy: +/- 2%