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.
Wirelessly monitors refrigerators from up to 100 ft. away, offering min/max memory and high/low alarm. Fisher Scientific Traceable Wireless Radio-Signal Refrigerator Thermometer includes a remote refrigerator bottle probe module with three channels (set to 1, 2 and 3).