®Science Equipment for Education Physics

18 :: FLUID AND GASSES

Water powered air pumpPolypropylen plastic pump. Connection threads for 1/2"and 3/4" pipes. Sealing fitting with “O”-ring. Suppliedwith a reverse flow valve. Total length: 270 mm.

0690.20 Water powered air pump

Water powered air pumpChrome plated brass with sealing fitting with 1/2" pipethread. Supplied with reverse flow valve. Conical tubeconnection fitting 11-12 mm. Total length: 140 mm.

0690.30 Water powered air pump

Water powered air pumpManometer of chrome plated brass with a scale from 0-1 bar. Accuracy 0.025 bar. Also as 0690.30. Total length:160 mm.

0690.40 Water powered air pump

Vacuum pumpElectric rotary vane vacuum pump. The pump is equippedwith an automatic gas ballast valve which will open in caseof condensable steams suction. In such cases the gas bal-last valve will operate to avoid condensation inside thepump and evacuate steam or fumes including oil.

Technical data:Mains operated: 220 V AC, 50 Hz Free air displacement: 27 l/min. Ultimate vacuum: 5 x 10 -1 Pa Motor power: 1/3 HPFittings sizes: 1/4”G Oil: 220 ml Net mass: 12.5 kg Dimensions L x W x H: 336 x 123 x 255 mm

0695.25 Vacuum pump

Oil for vacuumpumpFor refilling or replacingthe operating oil in Vacu-um Pump 0695.20

0695.30Vacuum Oil 1 liter

0690.20

0690.30

0690.40

0695.25

0695.30

®Science Equipment for Education Physics

FLUID AND GASSES :: 19

0700.10

0715.000710.20

Vacuum meterThe meter scale goes from 0 to 1.0 bars at 0.05 bar intervals. The meter dia-meter is 50 mm. It is supplied with a tube connector fitting.

0700.10 Vacuum meter

Hand-powered vacuum pumpThis hand-powered vacuum pump uses a piston.

It is supplied with a one-way valve and tube connection fitting.Ultimate vacuum down to 0.1 atm.

0715.00 Hand-powered vacuum pump

Vacuum greaseSilicone grease for high vacuum applications. The grease is approved for temperatures from -40 to +250 degrees C.The can contains 60 grams.

0710.20 Vacuum grease

Pascals vases apparatusThese vases are used to show that pressure in a liquid isa function of depth only. The vases are four differentlyshaped glass vessels which may be attached to a basewhich has a diaphragm sensitive to pressure and con -nected to a dial. Bottom plate with support: 235 x 130mm, height incl. glass tube: 290 mm. Pressure sensorwith scale.

1610.00 Pascals vases apparatus

1610.00

Archimedes cylinder setThis equipment is for demonstrating Archimedes law. It consists of a plastic cylin-der supplied with an eye and a transparent container with nylon loops for suspen-sion on a newton meter or a balance. The plastic cylinder is immersed in water, andthe buoyancy of the water op poses the gravitational force on the cylinder with amagnitude corresponding to the weight of the displaced liquid. This can be com-pensated for by filling up the container with water, for the internal volume of thecontainer corresponds exactly to the volume of the plastic cylinder.

1640.10 Archimedes cylinder set

1640.10

®Science Equipment for Education Physics

20 :: FLUID AND GASSES

Air pressure demonstration jarA glass cylinder 120 x 120 mm high with ground bot tomedge for use on a pump plate, and flange on top for atta-ching a rubber membrane. Including Rubber Membrane.1730.00 Air pressure demonstration jar

Rubber membraneDimension: 220 x 220 x 0,2 mm1625.10 Rubber membrane

Collapsible metal canTo demonstrate the pressure of the atmosphere.1732.00 Collapsible metal can

Hydraulic pressThe device consists of two glass syringes of 2 and 20 ml.They are connected with a short PVC tube. Pressing onecylinder causes the other to move. The distances whichthe cylinders move are inversely proportional to the arearatios.1650.00 Hydraulic press

1730.00

1732.00

1650.00

Liquid level apparatusTo show that the level ofliquid in connected ves-sels is constant regard-less of the size or shapeof the vessels. The tubesare mounted on a plasticbase, diameter 120 mm.Overall height 230 mm.

1630.00 Liquid levelapparatus

1630.00

1645.00

Overflow container, archimedes’ beakerA body is immersed in the cylindrical beaker. Diameter:37 mm, height: 147 mm. The displaced liquid runs outthrough an overflow tube and can be collected. Used todemonstrate Archimedes law.1645.00 Overflow container, archimedes’ beaker

®Science Equipment for Education Physics

FLUID AND GASSES :: 21

Pelton turbine with generatorAssembled, operational model which by means of wateror air jets is capable of producing electricity to light a fila-ment lamp. Turbine housing of plexiglass. Turbine wheelof black plastic. As generator is used an ordinary 6 V ACbicycle dynamo.Turbine housing: H. 195 mm, W. 170 mm, D. 100 mm.1705.00 Pelton turbine with generator

1705.00

Magdeburg hemispheresFor demonstration of the pressure exer-ted by the atmos phere. Made of chromeplated brass with rubber gasket. Provi-ded with venting screw and connectorwith non-return valve. Diameter 110 mm,mass 711 g.

1735.00 Magdeburg hemispheres

Gasket for 1735.00Rubber Gasket1735.01 Gasket for 1735.00

Magdeburg hemispheres, student versionMade of black rubber. Package with 4 pairs.

1735.20 Magdeburg hemispheres, student version

1735.20

Cartesian devilUsed to demonstrate liquid pressure. Hollow glass figure, height ca. 45 mm.

1660.00 Cartesian devil

1735.00

1660.00

®Science Equipment for Education Physics

22 :: FLUID AND GASSES

DasymeterFor demonstration of air buoyancy when placed ina vacuum receiver. Hollow plastic ball suspendedon beam with adjustable weight. Dimensions: H. 135 mm, L. 120 mm, W. 65 mm.

1740.00 Dasymeter

1740.00

ManometerThis simple, user-friendly manometer has a digital read-out display which shows the measured pressure directlyin kPa. Measuring range: 0-200 kPa with an uncertaintyof +/-2%. Connection directly to a tube connection onthe front panel is possible for tubing with dia. 5-7 mm.Power supply: 6 ea. 1,5 V AA batteries or line adapter3550.10-3550.20 (included).

1770.00 Manometer

1770.00

Demonstration multimeter

Manometer · pH-meter · thermometer · multimeter

To maintain maximum stu-dent interest in a demon-stration re quires student in -vol vement. This new DemonstrationMultimeter ensures studentinterest by allowing the stu-dents, no matter where theyare in the class room, to seethe instrument readings firsthand. Your students no longer ha -ve to just take your word forit, they can see the readingsthemselves.Designed especially foreducation, this Demonstra-tion Multimeter has eightvery significant features.

3867.70

®Science Equipment for Education Physics

FLUID AND GASSES :: 23

Pressure sensorsThe sensors are connected to the DIN-connectors of these instru-ments. Then measurements can commence. The instrumentsmake their own identification of the sensor which is connected.The sensors are supplied with a tube fitting to which plastic tubingwith an internal diameter of 5 or 6 mm can be connected.

Low pressure sensor:Measuring range: 0-1300 hPaAccuracy: 1%IM-1314.10 Pressure sensor

High pressure sensor:Measuring range: 500-7000 hPaAccuracy: 1%IM-1315.10 Pressure sensor

IM-131410

IM-131510

1. Extra large (45 mm high) digitsAnd since the digits are LEDs (Light Emit-ting Diodes) they can easily be seen fromthe back of the classroom (up to 8 me -ters).

2. Extra large units symbolsThe units symbols (hPa, V, pH, °C, A, Ωand Hz) ensuring that no student is con-fused as to what is being measured. Abright 30 mm LED matrix makes this pos-sible. Switching functions automaticallyset the correct units symbol.

3. AutorangingThe measuring range is automaticallymatched to the measured value.

4. One instrument for both chemistryand physicsThis particular instrument will be usedday after day since it not only measuresthe usual electronic quantities such as volts, amps andohms, but it also measures pressure pH and tempera turefrom minus 50 to plus 1200 degrees Celsius.

5. Back facing teacher's displayIn most cases the teacher stands be hind the measuringinstrument, making the reading af the display somewhatawk ward. A second display is available for the back ofthe in strument. Its 14 mm high digits ensure that the teacher can read the value even when a few metersaway from the instrument.

6. Computer OutputAn RS 232 C output makes it a simple matter to con nectyour computer to the experiment. The output is optically

isolated from the instrument input so there is no dangerof damaging the computer when working with high vol-tages. Since the output is controlled by a microproces-sor, using standard data formats, connection to a com-puter is straightforward.

8. Graphing program availableFor those cases where it is desirable to plot a functionversus time (such as temperature during a chemical rea-c tion) a program is available to take measurement atspecific time intervals and then plot the points on agraph. This graph may also be plotted on a printer.

3867.70 Demonstration multimeter.

®Science Equipment for Education Physics

24 :: FLUID AND GASSES

1780.00

1785.10

Student bell jarThis bell jar provides a vacuum chamber for students to perform manyexperiments: Watching a balloon expand. Warm water boil as air is pum-ped from the chamber. Observing that a suction cup no longer sticks whenthe jar is evacuated. Hand-Powered Vacuum Pump no. 0715.00 or a 100 mlplastic syringe and valves can be used for evacuating the Jar. To measurethe pressure in the Student Bell Jar no. 1771.00. Barometer can be usedsince it fits into the Bell Jar.1786.00 Student bell jar

1786.00

Barometer, miniFor the measurement ofbarometric pressure inmillibars and millimetersof mercury with anadjustable dial to recordthe previous observati-on. The diameter of thebarometer is only 67.5 mmwhich makes it possible to putit inside the “Glass with tube connector” pro-duct 1786.00 to simulate over and under pres-sures in the glass container. The barometer canbe calibrated using an adjustment screw.

1771.00 Mini barometer

1771.00

Air pump plateThis plate is used with a bell jar for demonstration expe-riments involving low pressure. The plate is made of PVCand supplied with rubber feet. There is a vacuum con -nec tion fitting with a valve and a thumb screw for thereturn air. Two standard 4 mm jack connectors are pro -vided with 4 mm jack connections available inside thejar. Tube fitting diameter: 10 mm. Plate diameter: 235mm, height: 40 mm, mass: 1.3 kg.1780.00 Air pump plate

Bell jar with knobUsed in conjunction with pump plate no. 1780.00 for theproduction of va cuum. Arranged in heavy glass with ground flange. Diameter 180 mm, height 250 mm.1785.10 Bell jar with knob

®Science Equipment for Education Physics

FLUID AND GASSES :: 25

Plastic cylinder with PistonFor demonstration of the relation between volume andpressure at constant temperature (Boyle-Mariotte). Thecylinder is graduated and provided with a 1 cm2 pistonas well as strap and hook, allowing it to be acted on bya dynamometer.

1810.00 Plastic cylinder with Piston 1 cm2

1810.10 Plastic cylinder with Piston 2 cm2

1805.00

1810.00

1810.10

Boyle-Mariotte apparatusThis device is used to demonstrate the connection be -tween pressure and volume at constant temperature.The apparatus consists of a graduated cylinder with apiston. The cylinder acts upon a manometer via a narrowpassage. The cylinder is supplied with a screw valve.The manometer diameter is 100 mm. The length of theapparatus is 350 mm.

1805.00 Boyle-Mariotte apparatus

Wind speed meter, digitalThis electronic wind speed meter meter has an easilyreadable digital display. The instrument can display windspeeds directly in km/hour, m/s, knots or feet/minute.The anemometer itself is mounted with low-friction ballbearings inside a protective housing. A 110 cm long cab-le connects the anemometer unit with the readout unitwhere the wind speed can be read directly in the unitsselected. The wind speed data is updated 2.5 times persecond. Anemometer operation is independent of orien-tation.

Technical specifications:Measuring range Resolution0.8 - 30.0 m/s +/- 0.1 m/s2.8 - 108 km/h +/- 0.1 km/h1.6 - 58 knots +/- 0.1 knot160 - 5900 feet/minute +/- 10 feet/minAccuracy +/-3% of full scale, +/- 2 digitsPower supply 1 ea. 9 V block battery

1876.05 Wind speed meter, digital

1876.05

E-201

Experiment