The longitude (abbreviation: Long., Î», or lambda) of a point on the Earth's surface is the angle east or west from a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses (often improperly called great circles), which converge at the north and south poles.
Use the dual thermometers to calculate relative humidity. Fisher Scientific Mason's Hygrometer has one dry thermometer and one wet thermometer which provide temperature readings for determining the relative humidity.
Product description. The Fluke FP-PROBE Field Replacement Probe is a replacement resistance temperature detector (RTD) probe sensor for the Fluke FoodPro Plus thermometer (sold separately). It measures temperatures from -40 to +200 degrees C (-40 to +392 degrees F). It snaps into place to replace a broken built-in fold-out temperature sensor.