Timstar - Science

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.