Timstar

Specific gravity. Universal range 370 mm 0.01°SG.

Spare Lamp for ME10365.

Soda Glass. Outside diameter 1.8-2.0 mm. Wall thickness 0.28-0.32 mm. In packs of 100.

Chemical jigsaws offer highly effective method of teaching chemical formulae and equations. It uses number of interlocking pieces with plus signs and arrows that enable students to build representations of covalent and ionic compounds and also to model equations. Advantages: • More effective understanding of formulae • Enhanced motivation • Use of OHP for demonstrations. Covalent jigsaw:- In the covalent jigsaw, atoms are represented by coloured disks with cut-outs corresponding to the positions of atoms in the periodic table. Atoms are joined by clear bonds representing electrons shared between atoms. The covalent jigsaw is available in two boxed sets. Ionic jigsaw:- The ionic jigsaw pieces build on the popular method of using squares and rectangles to aid the determination of ion ratios when constructing formulae. The parts are translucent and can be placed on an OHP for projection. The formulae can be identified by shape, colour and identifying symbols/formulae can be written on them in felt-tip pen. Please Note: the KS3 kit is required prior to the KS4-upgrade kit.

Chemical jigsaws offer highly effective method of teaching chemical formulae and equations. It uses number of interlocking pieces with plus signs and arrows that enable students to build representations of covalent and ionic compounds and also to model equations. Advantages: • More effective understanding of formulae • Enhanced motivation • Use of OHP for demonstrations. Covalent jigsaw:- In the covalent jigsaw, atoms are represented by coloured disks with cut-outs corresponding to the positions of atoms in the periodic table. Atoms are joined by clear bonds representing electrons shared between atoms. The covalent jigsaw is available in two boxed sets. Ionic jigsaw:- The ionic jigsaw pieces build on the popular method of using squares and rectangles to aid the determination of ion ratios when constructing formulae. The parts are translucent and can be placed on an OHP for projection. The formulae can be identified by shape, colour and identifying symbols/formulae can be written on them in felt-tip pen. Please Note: the KS3 kit is required prior to the KS4-upgrade kit.

These 3D Molecular Designs Magnetic Water Kits© will help students to understand the structure and properties of water. They can ""see and touch"" water in its dimensions and embedded magnets enable students to ""feel"" hydrogen and oxygen atoms attract and repel each other. Features include: Magnets in oxygen atom, so students can make ice; Permanently embedded magnets (magnets won't fall out when atoms are unassembled); Removable hydrogen atoms, so students can assemble water and compare hydrogen bonds to covalent bonds; Non-polar ethane, so students can see and feel how non-polar molecules interact with polar molecules; Hydroxyl group, so students can make ethanol; CD with Lesson Plans. As students explore the 3D water kit they will be able to: See spontaneous bonding, Compare hydrogen bonds to covalent bonds, Make ice crystals, Dissolve salt, Evaporate water, Add non-polar ethane to water, Create ethanol, Explore capillary action. Each 3D Molecular Designs Water Kit© cup includes: 12 water molecules, sodium, chloride, ethane and hydroxyl group. All atoms are magnetised to reflect their positive or negative charges (except non-polar ethane). This 6-Cup Water Kit© also includes CD with Secondary school lesson plans.

This 3D Molecular Designs Magnetic Sodium Chloride Model will help students to understand the structure and properties of ionic compounds. Each ion has embedded magnets to simulate ionic bonding. The 3 x 3 x 3 Lattice contains 27 ions (13 of type of ion and 14 of the other.) Lattices do not include water molecules, which are available, if required, in the magnetic water molecule kits. The model will help students gain an understanding of: Ionic structure and bonding, The cubic nature of salt crystals, Efficient lattice packing, High melting temperature, and Brittleness Cleavage planes.

This 3D Molecular Designs Magnetic Sodium Chloride Model will help students to understand the structure and properties of ionic compounds. Each ion has embedded magnets to simulate ionic bonding. The 4 x 4 x 4 Lattice contains 64 ions (32 Sodium and 32 Chlorine). Lattices do not include water molecules, which are available, if required, in the magnetic water molecule kits. The models will help students gain an understanding of: Ionic structure and bonding, The cubic nature of salt crystals, Efficient lattice packing, High melting temperature, and Brittleness Cleavage planes.

The magnetic Molecule Demonstration kit, from Bright of Sweden, is the perfect demonstration tool to help demonstrate molecules and chemical bonding to students in an easy and concrete way. The kit comes with 90 magnetised 'atoms' in different colours white (representing e.g. Hydrogen), black (e.g. Carbon), red (e.g. Oxygen), blue (e.g. Nitrogen), green (e.g. Chlorine) and yellow atoms (e.g. Sulphur) with 20 each of the black, white and red atoms and 10 each of the blue, green and yellow, enabling wide range of molecules to be represented. It also contains 50 bindings (bonds) the model can be used with or without bonds. As all parts of the kit are magnetised, they can be used directly on magnetic whiteboard or blackboard. Contents: 20 each of white, black and red 'atoms' 10 each of green, blue and yellow 'atoms' 50 bindings (bonds) Special storage box .

Study the unique molecular structure of carbon nanotubes. Fullerene molecules are all visually interesting and can be well represented by molecular models. Their unique molecular structure results in numerous potential exciting applications in current day nanoscience which can engage pupils and help to create link between chemistry and the 'real world'. This 530 mm model uses atoms from the Minit system which can be arranged to show the chair, zigzag or chiral structures of the tube and the associated properties. Particular areas to study include: • The similarities in structure of carbon nanotubes and the layers in graphite. • How curvature is achieved in the molecular shape of the ends of nanotubes due to the difference in bonding angles. • Different symmetries of carbon rings in the carbon nanotube the chair, zigzag and chiral structures and how these differences affect properties such as strength and conductivity and hence potential applications. Kits contains 260 atoms. Please note this kit version requires assembly.

A basic introductory set designed to help students understand chemistry. Consisting of: Spheres: 12 Carbon, 7 Oxygen, 2 Nitrogen, 1 Sulphur, 6 Halogen and 20 Hydrogen. Links: 33 short grey, 12 long grey and 29 Hydrogen connectors. Packed in plastic box with instructions.

Designed to make models of most compounds in the G.C.S.E. and Advanced level courses. Consisting of: Spheres: 24 Carbon, 12 Oxygen, 4 Nitrogen, 2 Sulphur, 12 Halogen, 3 Metal, and 40 Hydrogen. Links: 60 short white, 55 medium grey, and 25 long grey. Packed in plastic box with instructions.

A versatile set suited to G.C.S.E. and Advanced level courses covering a comprehensive range of organic, inorganic molecules from simple ones to complex ions. Consisting of: Spheres: 6Carbon, 22 Oxygen, 10 Nitrogen,12 Sulphur, 8 Halogen, 14 Metal, 7 Phosphorous and 14 Hydrogen. Links: 50 medium grey and mauve, and 36 long grey. Packed in plastic box with instructions.

Consisting of: Spheres: 12 Carbon, 6 Oxygen, 2 Nitrogen, 2 Sulphur, 4 Halogen, 1 Metal, 1 Phosphorous, and 20 Hydrogen, and 2 Pyramidal Nitrogen. Links: 26 short white, 26 medium grey, and 12 long grey. Packed in plastic box with instructions.

Consisting of: Spheres: 6 Carbon, 7 Oxygen, 3 Nitrogen, 2 Sulphur, 6 Halogen, 11 Metal, 2 Phosphorous, and 14 Hydrogen. Links: 20 medium grey, 12 long grey and 5 medium purple. Packed in plastic box with instructions.

MolyorbitaI™ 14 model collection set, containing sufficient parts to make 14 easy to self-assemble atomic orbitals, as shown in the picture. Pink and purple coloured pear shaped lobes represent the two wave phases, positive and negative of the p and d atomic orbitals. The atomic nuclei are represented by opaque white spheres. Each model comes with its own individual colourless transparent base for display purposes. Approximate model heights including base are: s-orbital 5 cm, p-orbital 9 cm, d-orbital 8 cm. Contents: Is, unhybridised x1, 2s, unhybridised x1, 2p, unhybridised x3, 3d, unhybridised x5, model of 2s plus three 2p orbitals, unhybridised x1, sp, sp2, sp3, hybridised x3.

Molyorbital™ model collection set containing Benzene, Ethane, Ethene and Ethyne. This set contains sufficient parts to make the 4 organic molecular orbital models, as shown in the picture. The models show: sigma bonding orbitals, pi bonding orbitals, concept of hybridisation and delocalisation. Contents: 12 carbon and 18 hydrogen atoms, 9 carbon-carbon (oval shaped) sigma bonds, 18 carbon-hydrogen (pear shaped) sigma bonds, 9 pi-bonds (21 pink and 21 purple pieces). Dimensions: Benzene diameter 20cm, height 10cm.

This set is designed for use by students in the classroom under the supervision of teacher or as useful revision aid. Specifically designed and updated for higher level Key Stage 3 Chemistry. Ages: 12+ This new Molymod® set contains total of 66 atoms and includes the following: Mon-metal elements from the periodic table: 14 Hydrogen, 12 Oxygen, 6 Nitrogen, 6 Carbon, 2 Sulphur Group 7 Halogen elements: 2 Fluorine, 4 Chlorine, 2 Bromine, 2 Iodine Metals: 4 grey metal 1 hole (K, Na), 4 grey metal 2 hole (Mg, Ca, Zn, Fe), 4 copper 2 hole (Cu), and 4 grey metal 3 hole (Fe, Al). Connectors: 20 grey single connectors, 40 grey multiple connection links, and 10 purple single bond links which, if required, may be used to represent ionic bonds. Key Stage 3 Chemistry Kit outline Introduction to atoms, elements, compounds and their chemical symbols, molecular formulae and their representation by colour-coded model parts, with an emphasis on modelling the conservation of mass during chemical reactions, whereby the total number of atoms of the reactants equals the total number in the products. This set contains enough parts to model the chemical rearrangement of atoms (i.e. the Chemical reactions) listed below. • Oxidation by combustion of hydrocarbons, and the oxidation by rusting of metals • Thermal Decomposition of metal carbonates • Displacement reactions of metals in salts • Examples of common acids, bases alkalis • Neutralisation reactions of acids and alkalis • Reactions of acids with metals to produce salt plus Hydrogen • Reactions of acids with alkalis to produce salt plus water • Material examples of Polymers, PVC Polyethene. • Extraction of metals by the reduction of metal oxides by Carbon • Greenhouse effect, the production of CO2 by burning of fossil fuels • Reactions of acid rain on the soil, metals and limestone rocks. • Respiration chemical reaction of glucose Although beyond the scope of Key Stage 3 Chemistry, this set can also be used for GCSE Chemistry to model Hydrocarbon (Organic) chemistry up to 6 carbons, including Alkanes, Alkenes, Alkynes, Addition polymers, Alcohols, Carboxylic acids, Esters, Amino acids, Addition reactions of Hydrogen and halogens to Alkenes.

This set is designed for use by students working on their own or in pairs, in classroom under the supervision of teacher, or as revision aid. This Molymod® set contains total of 34 atoms and comes with both standard open and compact links to make either open or compact models. Also included are three flat pink paddles to represent ""R"" groups. Contents: 14 Hydrogen, 7 Oxygen, 3 Nitrogen, 6 Carbon, 2 Sulphur, 1 Copper, 1 Phosphorus, 3 Pink R-Groups, 26 grey single bond links, 12 grey multiple bond links, and 50 compact model links. With 1 kit: • Introduction to Organic chemistry & Functional groups • Simple Aldoses, Ribose, Ketoses, Fructose • Monosaccharides of Glucose, Galactose • Phospholipids • Triglyceride lipids • Saturated and Unsaturated cis/trans Fats lipids • One example of an Amino acid • Building block of DNA, RNA phosphate group • Pyrimidines With 2 kits: • Comparison of Alpha & Beta glucose • Condensation reaction & the Glycosidic Bond • Disaccharides • Formation of proteins & the peptide link • Purines in DNA the Nucleotides With 3 kits: • Carbohydrates • Photosynthesis reaction • Respiration reaction

This kit contains sufficient atom parts to make the Sodium Chloride structure. It is supplied in a plastic container with full self assembly instructions.

This kit contains sufficient atom parts to make the Diamond structure. It is supplied in a plastic container with full self assembly instructions.

This kit contains sufficient atom parts to make the Graphite structure. It is supplied in a plastic container with full self assembly instructions.

This kit contains sufficient atom parts to make the Buckminster Fullerene structure. It is supplied in a plastic container with full self assembly instructions.

This kit contains sufficient atom parts to make the Quartz structure. It is supplied in a plastic container with full self assembly instructions.

This kit contains sufficient atom parts to make the Ice structure. It is supplied in a plastic container with full self assembly instructions.

These kits contain sufficient parts to make individual structures. Complete with Instructions.

These kits contain sufficient parts to make individual structures. Complete with Instructions.

A semi-space filling set for making wide range of biochemistry molecular models. Consisting of: Spheres: 66 Carbon, 34 Nitrogen, 40 Oxygen, 6 Phosphorus, 2 Sulphur, 2 Metal, 105 Hydrogen. Links: 100 short white, 60 non-visible. Packed in 2 plastic boxes with instructions.

An open-type set. Consisting of: Spheres: 21 Carbon, 13 Oxygen, 25 Hydrogen, 11 Nitrogen, 1 Sulphur, 1 Phosphorus. Links: 40 medium grey. Packed in plastic box with instructions.

The Molyorbital™ model collection set contains sufficient parts to make the eight atomic models shown in the picture. The different shapes are examples of the orientations of the bonds and cover coordination numbers to 6. Lone pairs are represented by brown spheres or brown pear shaped parts. The extra pear shaped parts are included in the set to enable protonated models to be made. e.g. Acid/Base theory, the formation of H3O+ as result of the migration of H+ from hydrogen chloride. Models: linear, HCl (hydrogen chloride); linear, BeCl (beryllium chloride); Bent, H2O (water); trigonal planar, BH3 (boron trihydride); Pyramidal, NH3 (ammonia); tetrahedral, CH4 (methane); trigonal bipyramidal, PCl5 (phosphorus pentachloride); Octahedral, SF6 (sulphur hexafluoride).

Green.

White.

Green.

Red.

White.

Blue.

Black.

Blue.

Red.

Yellow.

Grey.

Short white links.

Medium purple links.

Medium grey links.

Long grey links.

Long purple links.

Molymod® Spares, short link remover.

For structures of sulphur, sodium chloride, diamond and graphite, metals, acids and bases, petroleum, soaps and detergents, nylon, water and ice, polymers, amorphous structures.

Unit™ Molecular Building System is probably the most versatile and durable large scale molecular model building system for front of class demonstrations. Easily build large large-scale models of organic, inorganic and biochemical molecules for demonstration in lecture halls and classrooms. Show molecular shapes with rotating single bonds and non-rotating double and triple bonds, structural isomers and optical isomers, ring structures, chair-boat 'flip' of cyclohexane and VSEPR theory. You can make models of hydrocarbons, alcohols, amines, organic and inorganic acids and bases, carbohydrates, benzene, chlorinated molecules, inorganic molecules and more that the whole class can see! The system uses large (44mm diameter) spheres in seven colours to represent different atoms plus 25mm diameter white sphere to represent hydrogen atom. versatile peg system allows you to use each large model atom in either tetrahedral (sp3), trigonal (sp2), linear (sp), trigonal bipyramidal (dsp3) and octahedral (d2sp3) geometries. These can then be joined with either rigid aluminium or flexible vinyl tubes. These larger scale models are perfect for lectures and classroom demonstrations. Contents include: 70 Atoms: 18 Carbon (black); 6 Oxygen (red); 4 Nitrogen (blue); 6 Halogen (green); 2 Sulphur (yellow); 2 Metal (silver); 2 Other element (white); 30 Hydrogen (white). 144 Bonding pegs: 48 radial, 24 polar, 72 and coordinate. 90 Bonds: 36 Rigid tube (metal) 65 mm; 40 Rigid tube (metal) 83 mm; 4 Rigid tube (metal) 125 mm; 10 Flexible tube (white) 90 mm. • Structures can be seen from the back of the class • Bonds and atoms are to scale for accuracy at 8.5cm per 100pm • Sturdy pegs join atoms and bonds at any bond angle • Easy to handle, build and take apart • Durable plastic and metal parts enable long • Full range of supplementary atoms, bonds and orbitals available

A sturdy, compact pH meter which gives fast, accurate readings, displayed clearly on large LCD. The thin long-reach tube fits easily into test tube. Two-point calibration with automatic buffer recognition. Takes CR2032 cell (included). • Range: pH 0.00-14.00 • Resolution: 0.01 pH • Accuracy: ±0.2 pH • Battery life: 1000 hours • Dimensions: 71 x 50 x 21 mm (excluding probe) • Weight: 50 g

Replacement Electrode for PH180100

Compact, waterproof pocket meter with dual display showing pH and °C. • pH range 0.0-14.0 • Temperature range 0.0-60.0 °C • A.T.C. auto shut off (after mins) • Automatic or point calibration • Replaceable pH electrode • Dimensions (L x W x D): 163 x 40 x 26 mm

Replacement Electrode for pH Pocket Testers

This pocket pH meter is easy to use, giving fast, accurate and repeatable measurements of pH values. It has the unique feature of a retractable electrode. The LCD display has large digits making it easy to read and the protective cap allows the inclusion of a small sponge to keep the electrode moist to help prolong its life. Dimensions (L x W x D): 158 x 40 x 34 mm. • 0 to 14.0 pH 0.1pH (MPH-5011) • Impact-resistant ABS case • Splash-proof membrane keypad • Electrode can be extended up to 80 mm • Manual calibration via screw trim pot • Pocket clip moulded on the rear of the case • Supplied with electrode, protective cap, calibration screwdriver, 50 mL calibration solution and carry case • Powered by 9 V PP3 battery • Weight: 120 g • Warranty: 6 months

This pocket pH meter is easy to use, giving fast, accurate and repeatable measurements of pH values. It has the unique feature of a retractable electrode. The LCD display has large digits making it easy to read and the protective cap allows the inclusion of a small sponge to keep the electrode moist to help prolong its life. Dimensions (L x W x D): 158 x 40 x 34 mm. • 0 to 14.0 pH 0.01pH (MPH-5011A) • Impact-resistant ABS case • Splash-proof membrane keypad • Electrode can be extended up to 80 mm • Manual calibration via screw trim pot • Pocket clip moulded on the rear of the case • Supplied with electrode, protective cap, calibration screwdriver, 50 mL calibration solution and carry case • Powered by 9 V PP3 battery • Weight: 120 g • Warranty: 6 months

These buffer solution capsules for use with pH electrodes are convenient and easy to use. Simply split the capsule in two and add to 100 mL of deionised/distilled water and mix. No minimum shelf life, so will keep for years!

These buffer solution capsules for use with pH electrodes are convenient and easy to use. Simply split the capsule in two and add to 100 mL of deionised/distilled water and mix. No minimum shelf life, so will keep for years!

These buffer solution capsules for use with pH electrodes are convenient and easy to use. Simply split the capsule in two and add to 100 mL of deionised/distilled water and mix. No minimum shelf life, so will keep for years!

These buffer solution capsules for use with pH electrodes are convenient and easy to use. Simply split the capsule in two and add to 100 mL of deionised/distilled water and mix. No minimum shelf life, so will keep for years!

pH Electrode Cleaning Solution, 'Hanna'

Robust, double junction gel filled electrode with temperature range to 80°C. With free cleaning solution.

A high performance, single junction, refillable electrode with temperature range -5 to 100°C. With free cleaning solution.

pH Electrode Storage Solution, 'Hanna'

Conical (Erlenmeyer) Flasks - Timstar, 100/1

Conical (Erlenmeyer) Flasks - Timstar, 100/2

Conical (Erlenmeyer) Flasks - Timstar, 250/2

Conical (Erlenmeyer) Flasks - Timstar, 250/3

Conical (Erlenmeyer) Flasks - Quickfit, 50 mL.

Conical (Erlenmeyer) Flasks - Quickfit, 100 mL.

Conical (Erlenmeyer) Flasks - Quickfit, 500 mL.

Comprises Liebig condenser, still head and receiver adapter in single piece advantages include: Angle and position pre-defined; Simple to set up with fewer clamps required; Less grease contamination; No air leakage under vacuum; No liquid hold-up at the joints. Fits 8 mm bore tubing.

Pear shape.

Connectors fit 8 mm bore tubing.

125 mL dreschel bottle.

With socket and cone.

With socket and cone.

With socket and cone.

With socket and cone.

Expansion Adapter, Quickfit, 14/23, 19/26

Expansion Adapter, Quickfit, 14/23, 24/29

Heavy wall, screw thread connection. Screw thread connector fits mm bore tubing.

Heavy wall, screw thread connection. Screw thread connector fits mm bore tubing.

Vigreux type.

Dufton type.

Dufton type.

For jointed glassware. Will support full 1 L flask without using clamp at temperatures up to 50°C ambient and 80°C through the joint itself.

For jointed glassware. Will support full 1 L flask without using clamp at temperatures up to 50°C ambient and 80°C through the joint itself.

For jointed glassware. Will support full 1 L flask without using clamp at temperatures up to 50°C ambient and 80°C through the joint itself.

For jointed glassware. Will support full 1 L flask without using clamp at temperatures up to 50°C ambient and 80°C through the joint itself.

Ideal set for basic organic chemistry. 14/23 joint size. Set comprises: • Leibig Condenser • Air Leak Tube • Receiver Adapter • 100 mL Separating Funnel • 50 mL Round Bottom Flask • 100 mL Round Bottom Flask • 250 mL Round Bottom Flask • Reduction Adapter • Multiple Adapter • Receiver Adapter • Stillhead • 250 mL Conical Flask • Thermometer Pocket • Stoppers x 3

This set has been designed to cover the essential requirements for the teaching of organic chemistry in schools and colleges, and is difficult to beat for versatility. The set, made from borosilicate glass, comprise nine items of glassware housed in foam insert within cardboard box. Items included are: • Air Leak/Steam Inlet tube • Still Head • 50 mL Dropping Funnel • Screw thread Adapter • 50 mL Pear Shaped Flask • Receiver Adapter • Liebig Condenser • Stopper • Thermometer

This set has been designed to cover the essential requirements for the teaching of organic chemistry in schools and colleges, and is difficult to beat for versatility. The set, made from borosilicate glass, comprise nine items of glassware housed in polystyrene insert within Gratnells tray. Items included are: • Air Leak/Steam Inlet tube • Still Head • 50 mL Dropping Funnel • Screw thread Adapter • 50 mL Pear Shaped Flask • Receiver Adapter • Liebig Condenser • Stopper • Thermometer

The Quickfit® Microscale Chemistry Kit was designed to perform organic chemistry experiments, but on much smaller scale. This reduces your cost of everything involved, smaller amounts of reagents, lower disposal costs and less clamping equipment. Most standard organic chemistry sets may be performed using this set. The main benefits are: cheaper (reduced solvent costs), safer (smaller amounts of chemicals and no Bunsen burners required), quicker (reduced times for experiments), versatile (many assemblies can be constructed reflux, distillation, fractional distillation etc.) and easy to assemble (combination of standard Quickfit® ground glass joints and sealing 'O' rings and plastic screwcaps). Dimensions (L x W x D): 40 x 25 x 20 cm (unpacked). Contents: • Air condenser • Drying tube • Still head • Jacketed condenser • Thermometer adapter • 25 mL Pear shaped flask • 10 mL Pear shaped flask • Bag of spare caps, seals and 'O' rings • 25 mL Round bottom flask • 10 mL Round bottom flask • 10 mL Erlenmeyer flask • 25 mL Erlenmeyer flask • Receiver

Screwthread connectors fit 8 mm tubing.

Screwthread connectors fit 8 mm tubing.

Screwthread connectors fit 8 mm tubing.

Screwthread connectors fit 8 mm tubing.

These screw thread connectors are for glassware with 13 mm screw thread inlets and outlets. They allow 9 mm bore rubber hose and flexible tubing to be attached to the glassware easily and safely.

For Timstar 'Benchmark' Liebig Condensers.

Screwthread connectors fit 8 mm bore tubing.