The D&D Barometers Eco Celli Liquid Barometer Thermometer model E038 features a tough acrylic frame, is mercury free, and perfect for home or school.
NEW and ON SALE NOW!
Liquid barometers definitely have a place in our schools as a
teaching device allowing students to actually see the affects of
atmospheric pressure on the liquid in the barometer. An electronic
digital barometer cannot provide this visual reinforcement as all the
students see are numbers changing, much like a digital clock. The
problem with liquid barometers is that they are made using mercury,
which has been proven to be an extremely hazardous material, especially
to children.
In August, 1998 D&D Barometers of Belgium
patented the first mercury free liquid barometer having the same
accuracy as a mercury barometer in measuring
sea level corrected atmospheric pressure. They named their barometer the Eco-celli after Evangelista Torricelli, the inventor of the barometer.
The Eco-celli E038 contains no mercury. The 64 inch long U-shaped
glass tube is filled with a red fluid and gas. Because of the length of
the barometer tube, the barometers scale is four times larger than a
standard mercury scale making it much easier for a student to read.
The physics involved is Boyle's Law - air pressure presses down on
the red fluid which compresses the gas in the reservoir end of the
barometer tube.
The precision thermometer is filled with blue
colored methyl alcohol. An increase or decrease in temperature can
cause the fluid in the barometer to expand and affect the pressure
reading. This is corrected by setting the movable scale, which is
attached to both the barometer and thermometer, to the top of the blue
fluid in the thermometer.
The Eco-celli barometer costs 1/3 to
1/2 less than a comparable mercury barometer. Given the low cost and
non-mercury operation, replacing mercury barometers in the classroom now
is a sensible option. Each mercury barometer contains approximately
one pounds of mercury and most middle, high schools and colleges in the
nation have at least one, if not many more. By replacing these
barometers, we could remove tons and tons of mercury from ever becoming
an environmental hazard.
Specifications:
The Eco-celli liquid barometer consists of a 64-inch long U-shaped
tube filled with a red fluid and gas. The pressure of this red fluid on
the gas is principle upon which the barometer operates. Adjacent to the
barometer tube is a 32-inch long blue methyl-alcohol thermometer.
A truly unique scale that slides between the thermometer and
barometer compensates for thermal expansion of the fluid and glass
tubing due to changes in room temperature and allows for accurate
measurement of air pressure.
The barometer scale is four times larger than a mercury barometer, making it much easier to make readings of air pressure.
The temperature scale measures in Degrees F and C, while the pressure scale measures in both millimeters and inches.
The Eco-celli Liquid Barometer Thermometer comes with a calibration kit to adjust the unit for an altitude above sea level.
The Eco-celli reads sea level corrected air pressure. This is the
pressure used in weather forecasting. It is not designed to read
altitude specific air pressure.
The model E038.501 was been specifically designed for use in home, and school science classrooms and school laboratories.
It is made of durable clear acrylic 1/2" thick with very easy to read scales.
The glass tubes are easily replaceable if broken.
Additional calibration kits and red fluid are also available.
DIMENSIONS:
- U-shaped tube: length = 32.28" x width = 1.57"
- Thermometer tube: 32.28"
- Thermometer scale: 32 - 122 degrees F, 0 - 51 C
- Barometer scale: 28.80 to 31.00 inches and 732 - 782 mm
- Frame size = 36.5" long x 5.75" wide
- The acrylic frame and
glass tubes are packaged separately in the same box and will require
simple assembly during set up by the customer.
