Heat

(Ελληνικά)

Η θερμότητα είναι μορφή ενέργειας που αφορά μακροσκοπικά αντικείμενα, επί της ουσίας όμως πρόκειται για την κινητική ενέργεια (μεταφοράς και περιστροφής) και την ενέργεια ταλάντωσης των μορίωνατόμων ή ιόντων ενός σώματος η οποία αποθηκεύεται και μεταφέρεται με φορείς στη μικροκοσμική κλίμακα. Η κινητική ενέργεια αφορά κυρίως τα ρευστά. Επίσης η θερμότητα αποθηκεύεται με τη διέγερση των δεσμευμένων ηλεκτρονίων σε υψηλότερες ενεργειακές στάθμες. Έτσι έχουμε τη μεταφορά της θερμότητας και με ηλεκτρομαγνητική ακτινοβολία που εκπέμπεται καθώς τα ηλεκτρόνια επιστρέφουν στη μη διεγερμένη τους κατάσταση.

Σύμφωνα με τον δεύτερο νόμο της θερμοδυναμικής, η θερμότητα τείνει να ρέει αυθόρμητα από θερμότερα σώματα προς ψυχρότερα, ενώ οι ροές της μπορούν να μετατραπούν μερικώς σε ωφέλιμο έργο μέσω μιας θερμικής μηχανής.

PROFFESIONAL DIGITAL THERMOMETER

59,90 74,28 with vat

59,90 74,28 with vat

  • Availability: in stock
811020
Radiometer, Crookes

35,00 43,40 with vat

Radiometer, Crookes

Radiometer, Crookes One side of each vane is blackened, the reverse side is white. Infrared radiation heats the black faces of the vanes more than the white, causing a pressure difference on either side of the vanes which drives the vanes round, providing a pleasant visual demonstration of several physical effects.

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35,00 43,40 with vat

  • Availability: in stock
620312
Hero’s Engine

17,90 22,20 with vat

Hero’s Engine

A visual demonstration of the work potential of steam! The apparatus is based on the principles used in a steam-driven toy designed by Hero of Alexandria in150 BC. The flask is partially filled with water and is suspended over a burner. When the water boils, it will cause the flask to rotate rapidly. Steam escaping […]

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17,90 22,20 with vat

  • Availability: in stock
650301
Working project “Bimetal-Fan”

8,50 10,54 with vat

Working project “Bimetal-Fan” ,

Working project “Bimetal-Fan” Simple construction-it can be made in a normal classroom with everyday tools! Uses bimetal as a switch to close an electric circuit When the circuit is made the fan cools the bi-metal and then it switches itself off. A candle re-warms the bi-metal and it starts again Less battery, 1 each

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8,50 10,54 with vat

  • Availability: in stock
407920
Compound Bar (Cu&Fe), wooden handle

6,90 8,56 with vat

Compound Bar (Cu&Fe), wooden handle

A dramatic demonstration of the thermostat principle! Consists of a bimetal strip mounted in a wooden handle. Because of the unequal expansion of the two different metals, the bar will bend when heated which illustrates the operation of a thermostat.

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6,90 8,56 with vat

  • Availability: in stock
603011
BiMetallic Thermostat with Stand

13,90 17,24 with vat

BiMetallic Thermostat with Stand

BiMetallic Thermostat with Stand

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13,90 17,24 with vat

  • Availability: in stock
602007
Thermo-Fan

12,00 14,88 with vat

Thermo-Fan ,

A technical model to show the practical use of bimetal strip. Principle: when a 4.5 battery is connected to the model a current flows through the green bulb and Bi-metal strip to complete circuit 1. When the tea light, under the Bi-metal strip is lit, it heats it up and bends it in the opposite […]

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12,00 14,88 with vat

  • Availability: in stock
105434
Set of 2 Jars Black – White

5,90 7,32 with vat

Set of 2 Jars Black – White ,

(Ελληνικά) Δοχεία Αλουμινίου Μαύρο Άσπρο κατάλληλα για πειράματα απορρόφησης θερμότητας.

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5,90 7,32 with vat

  • Availability: in stock
650650
Niti Springs

13,71 17,00 with vat

Niti Springs

This spring is made from shape memory alloy. At room temperature this spring is soft enough to pull out to approximately 50mm by applying a small force. When heated to 70°C by passing an electric current through it (or by other means such as hot water or a heat gun, etc), the spring contracts to […]

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13,71 17,00 with vat

  • Availability: in stock
690003
Two-Way Memory Spring

7,66 9,50 with vat

Two-Way Memory Spring

Two-Way Memory Spring These remarkable springs, based on a brass alloy, ‘remember’ to open up when heated and close again when cool. If immersed in hot water at or around 90°C they will open in a split second and close as quickly if dropped in cold water. Such springs have many industrial applications – e.g., […]

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7,66 9,50 with vat

  • Availability: in stock
690007
Digital Thermometer with probe

35,90 44,52 with vat

Digital Thermometer with probe ,

(Ελληνικά) Είναι ιδανικό για φαγητά (HACCP), για κάθε εργαστήριο. Έχει τη δυνατότητα μέτρησης της θερμοκρασίας -40ºC… 200ºC, ανάλυσης 0,1ºC, ακρίβεια ±1ºC (στους -25… 150ºC), διαφορετικά ±1,5ºC.

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35,90 44,52 with vat

  • Availability: in stock
801015
Solar Furnace

11,90 14,76 with vat

Solar Furnace

To demonstrate that high temperature can be generated by focusing sunlight in an appropriate manner, and illustrating an alternative method of heating.

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11,90 14,76 with vat

  • Availability: in stock
620719
Calorimeter with resistance

19,90 24,68 with vat

Calorimeter with resistance

For determining the electrical equivalent of heat. The cover contains a mounted heating coil of about 1.5 ohms resistance with standard binding posts for electrical connections. When connected to a 6-volt battery, this coil will cause a temperature rise of about 5 degrees centigrade in 10 minutes. The supporting posts and coil are coated to […]

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19,90 24,68 with vat

  • Availability: in stock
608401
Food Calorimeter

79,90 99,08 with vat

Food Calorimeter

Food Calorimeter Food Calorimeter A glass jar incorporated with a inverted glass jar used as a combustion chamber open at both ends (205×100)mm (height x diameter). A copper spiral heat transfer tube vertically fitted with combustion chamber via. rubber stopper. A removable metallic top cover which allow to pass the stirrer and copper spiral tube […]

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79,90 99,08 with vat

  • Availability: in stock
611780
Thermal generator

21,90 27,16 with vat

Thermal generator ,

Thermal generator Thermoelectric generators (also called thermogenerators) are devices which convert heat (temperature differences) directly into electrical energy, using a phenomenon called the “Seebeck effect” (or “thermoelectric effect” ). Their typical efficiencies are around 5-10%.

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21,90 27,16 with vat

  • Availability: in stock
620311
Boiling Point Thermometers (set of 10)

19,90 24,68 with vat

Boiling Point Thermometers (set of 10) , , ,

Boiling Point Thermometers (set of 10) Thermometers measure from -30°C to 120°C and from-22°F to 240°F. Safe to use, these thermometers are mercury free.

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19,90 24,68 with vat

  • Availability: in stock
802415
Multi-Thermometer (-30.. 110°C) in plastic case ,

Multi-Thermometer (-30… 110°C) in plastic case This all-purpose thermometer has a temperature range of -30° C … 110° C. It comes in a case that magnifies the scale to make it easier to read. The case may be hung up or positioned to keep the thermometer at an angle. Six sliders allow the high and […]

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7,72 9,57 with vat

  • Availability: in stock
183304
Thermometer (-10 – 110), alcohol

2,20 2,73 with vat

Thermometer (-10 – 110), alcohol , , , ,

Thermometer (-10 – 110), alcohol Thermometer with hang -10 to 110C Suitable for laboratory use

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2,20 2,73 with vat

  • Availability: in stock
413960
Thermometer (-10 – 150), alcohol

2,42 3,00 with vat

Thermometer (-10 – 150), alcohol , , , ,

Thermometer (-10 – 150), alcohol Thermometer with hang -10 to 150°C Suitable for laboratory use

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2,42 3,00 with vat

  • Availability: in stock
413965
Thermometer (-10 – 110), Green fill, uncalibrated , , , ,

Thermometer (-10 – 110), Green fill These Uncalibrated Thermometers are designed for student calibration. An anti-roll device is moulded into the glass to prevent breakage, and the thermometers are supplied individually packed in sealed trays. Suitable for laboratory use

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2,90 3,60 with vat

  • Availability: in stock
413961
Thermometer -30 – +110, aluminium

1,90 2,36 with vat

1,90 2,36 with vat

  • Availability: in stock
840112
Infrared Thermometer

109,90 136,28 with vat

Infrared Thermometer

For contact-free measuring of surface temperature, with laser sighting. Technical Specifications: Display: Double digital LCD display Display selection: °C/°F display selection Hold funtion:Support Auto power off:Support Measurement range: -20°C ~ 537°C (-4°F ~ 999°F) Emissirity: 0.95 Field of view:12 : 1 Resolution: 0.1°C Laser power:&lt 1mW

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109,90 136,28 with vat

  • Availability: in stock
811116
Infrared Thermometer «Mini»

32,90 40,80 with vat

Infrared Thermometer «Mini» ,

For contact-free measuring of surface temperature small, easy to use, response time 0.5 sec. display of current, highest or lowest temperature during the measurement hold and lock function measuring range: -33… 220 °C (-27… 428°F), reversible °C/°F accuracy 0…50°C ±1.5°C, otherwise ±2°C or 2% battery CR 2032 button cell included. Dimensions: 68x37x18mm, 75g.

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32,90 40,80 with vat

  • Availability: in stock
841110
Peltier Element Type (Thermocouple)

16,93 20,99 with vat

Peltier Element Type (Thermocouple) , , , , ,

Technical data for the Thermo-element: Used as a Peltier for cooling-heating Maximum cold performance: 17Watt Maximum temperature difference: 67 degrees Maximum output 8V Maximum current: 3.5 A Maximum working temperature (constant): 70° For short time experimental purpose: 110° Resistance: 1.8 Ohm Heat value: 140 mW-K Weight: 15gr For use as a Thermo-Element: Thermo power: 27 […]

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16,93 20,99 with vat

  • Availability: in stock
407136
Thermochromic Smart Cord

1,21 1,50 with vat

Thermochromic Smart Cord , ,

This unique polythene extrusion has some remarkable characteristics and may be used as a single-lesson introduction to smart materials. Below 27°C the cord is pink but above this temperature the colour disappears. The pink then reappears when the temperature drops below 27°C. The cord also exhibits highly unusual behaviour if stretched. When pulled steadily it […]

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1,21 1,50 with vat

  • Availability: in stock
523001
Leslie’s Cube

29,90 37,08 with vat

Leslie’s Cube

A Leslie cube (or Leslie’s cube) is a device used in the measurement or demonstration of the variations in energy radiating from different surfaces. Leslie’s cube, invented by Sir John Leslie in the early 19th century, shows the effect of surface reflectance and emissivity on the absorption or emission of light. It comes with a […]

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29,90 37,08 with vat

  • Availability: in stock
661080
Stirling Engine Model, Vertical

32,26 40,00 with vat

Stirling Engine Model, Vertical

Stirling Engine Model, Vertical Stirling Engine Model, Vertical Height: 18cm

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32,26 40,00 with vat

  • Availability: in stock
671843
Investigating Heat and Temperature Kit

79,90 99,08 with vat

Investigating Heat and Temperature Kit

Investigating Heat and Temperature Kit Investigating Heat and Temperature Kit Explore various aspects of heat, temperature and heat transfer to gain understanding of the related concepts through this series of hands-on activities kit, which include Content Qty Content Qty Radiometer Crooke’s Single 1 Ring & Ball 1 Calorimeter Set/3,Big vessel 132 x 90mm, small vessel 90 […]

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79,90 99,08 with vat

  • Availability: in stock
661280
15%OFF
Studying Heat KIT

88,00 75,00 93,00 with vat

Studying Heat KIT ,

(Ελληνικά) Πακέτο Θερμότητας κατάλληλο για τις υποχρεωτικές ασκήσεις δευτεροβάθμιας εκπαίδευσης. Μπορείτε να πραγματοποιήσετε: Βαθμονόμηση θερμομέτρου, διαστολή υγρών και στερεών, μετατροπή φάσης, μεταφορά θερμότητας, θερμική ισορροπία, θερμική αγωγιμότητα διάφορων μετάλλων, κ.α.

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88,00 75,00 93,00 with vat

  • Availability: in stock
941206
Heating Lamp with bulb

45,00 55,80 with vat

Heating Lamp with bulb

Heating Lamp with bulb

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45,00 55,80 with vat

  • Availability: in stock
650651
Mass Cube Set, 10x10x51mm, Set of 4

10,90 13,52 with vat

Mass Cube Set, 10x10x51mm, Set of 4 , ,

Mass Cube Set, 10x10x51mm, Set of 4 Same volume but different weight Cu, Br, Al, Fe

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10,90 13,52 with vat

  • Availability: in stock
620112
Cylinder Set – Same weight diff. Volume

16,00 19,84 with vat

Cylinder Set – Same weight diff. Volume ,

Cylinder set of the same weight and different volume. Each Set of five: Al, Br, Cu, Fe, Zn. (Diameter: 20mm, weight 56gr).

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16,00 19,84 with vat

  • Availability: in stock
600435
Memory Wire (1 meter)

16,13 20,00 with vat

Memory Wire (1 meter)

Τhis nickel/titanium (NiTi) alloy initially ‘remembers’ that it should be straight. If it is bent into a different shape and then dropped in very hot water (90°C), it springs back to its original straight condition. It will repeat this behaviour any number of times. This wire is sold by the metre. The wire can also […]

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16,13 20,00 with vat

  • Availability: in stock
690011
Heat Radiator Demonstration

80,65 100,01 with vat

Heat Radiator Demonstration

Heat Radiator Demonstration Heat Radiator Demonstration This simple experiment allows students to measure how the color of an object affects its ability to absorb and to emit heat.Each kit contains 6 containers (black,white, red, blue, 2x silver – one matte, one shiny), retort stand with base, syringe, color dye, a lamp with bulb.

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80,65 100,01 with vat

  • Availability: in stock
631011
Linear Expansion Apparatus steam

79,90 99,08 with vat

Linear Expansion Apparatus steam

Measure the coefficients of different metal expansion. This Linear Expansion testing device makes studying the expansion of metals simple and instantly visible to the student. A metal rod is inserted into the steam chamber and steam is applied. Expansion of the rod is immediately registered by the dial indicator that is mounted on one end. […]

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79,90 99,08 with vat

  • Availability: in stock
600657
Linear Expansion Apparatus

32,90 40,80 with vat

Already Sold: 1 Available: 7
Linear Expansion Apparatus

Demonstrate linear expansion of solids and allows comparison of expansion rods of different materials. The set include 3 expansions bar, copper, aluminum and iron rods.

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32,90 40,80 with vat

  • Availability: in stock
660160

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