TESS - Training and Experimental System for Students

77 Products, 90 Experiments, 33 Sets, 21 Lit./Softw.

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	Electronystagmography Principle Electronystagmography (ENG) is an electrophysiological diagnostic procedure for measuring the movement of the eyes. Several electrodes measure the potential differences that are caused by the eye movements. When looking at a moving, regular, repetiti ...
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Product-No: P0873560

	Water quality - contamination with heavy metals Principle Heavy-metal ions may be carried into surface or ground water from mining fields or via the waste water of galvanicor similar production sites. They block the effect of enzymes so that the processes in the metabolism of the organisms that are controlle ...
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Product-No: P0990162

	We investigate our heartbeat - electrocardiography Principle The heart is a hollow, muscular organ that comprises several secondary muscles. These secondary muscles contract and relax successively, thus pumping the blood through the heart. These muscle activities can be measured electrically as a whole at the ...
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Product-No: P1332760

	We investigate our muscular power - electromyography Principle With the exception of the heart muscle, the contractions of striated muscles can be controlled at will. This characteristic enables the observation of the activities of individual muscle groups. An electromyogram (EMG) can be used to measure (record) ...
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Product-No: P1350360

	We measure our eye movements - electrooculography Principle With this experiment, you can find evidence of the electrical activity that is generated during the movement of your eyes. Several electrodes attached to the skin of the face measure all the changes of the electrical voltage that are caused by the mov ...
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Product-No: P1350460

	We examine our drinking water Principle This experiment shows how much the quality of drinking water of various locations in the same region can vary. The comparison of tap water with bottled mineral water and distilled water leads to surprising results.
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Product-No: P1520062

	Altitude measurement on a trail Principle The altitude profile of a hiking trail or route to school can be measured during a school trip or as an exercise for the students. The altitude profile can also be used to demonstrate that the atmospheric pressure decreases when the altitude increases ...
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Product-No: P1520262

	Measuring the height of a tower Principle The weather sensor can be used to determine the height of a tower as a function of the change in air pressure with the aid of the barometric formula.
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Product-No: P1520362

	Weather observation with the Cobra4 Mobile-Link Principle The compact Cobra4 "Weather" multisensor can be employed as a simple means to setup a weather station, which can then be used to explain the relationship between the air pressure, humidity, temperature, and the light intensity. The measurement combina ...
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Product-No: P1520462

	Terrain mapping Principle The drawing of maps is one of the favourite tasks of the students during geography lessons and of a high didactic value. The altitude measuring function of the Cobra4 Sensor-Unit "Weather" is a user-friendly tool which provides altitude values so that ...
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Product-No: P1520662

	Changes of the light conditions in a deciduous forest Principle Why are there only a few different kinds of plants in a deciduous forest? Except for having trees that are all approximately of the same height, hardly any other plants grow in a deciduous forest, except for young plants of the same type of trees. Th ...
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Product-No: P1520762

	Acidity changes of a watercourse Principle The pH value (a measure of the concentration of hydrogen ions) in running waters depends on the geological conditions, the pollution load that is caused by agricultural production, and on plant activities. This experiment shows how the pH value of a ...
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Product-No: P1520862

	Comparison of soil and air temperatures in the course of a day Principle How does the temperature of the air affect the temperature of the soil in the course of a day?
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Product-No: P1520962

	The pH value of various soils Principle Information concerning the quality of soils is of great importance for agricultural production. The students are familiarised with this subject via two experiments with pH measurements that show how much soils may differ from each other (experiment&n ...
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Product-No: P1521062

	Salinity of soils and plant substrates Principle How suitable are certain soils and plant substrates for the nutrition of plants? This experiment is about measuring the conductivity, which in turn provides information as to which of the examined soils and plant substrates already contain nutrient sa ...
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Product-No: P1521162

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