Timstar - Science

Green chromatography ink

Blue/Black chromatography ink

Supplied as box of 100 sheets.

Supplied as box of 100 sheets.

Pattern 'CRL'. Eleven 3mm wide slots. Supplied as box of 100 sheets.

Supplied in reel, 100 m long.

Supplied in reel, 100 m long.

Supplied in reel, 100 m long.

Supplied in reel, 100 m long.

Supplied in reel, 100 m long.

Supplied in reel, 100 m long.

Supplied in reel, 100 m long.

Dimensions (W x D x H): 230 x 90 x 230 mm.

To fit CH04012.

A set of 4 Mystrica colorimeters supplied in a deep Gratnells tray with a lid and polyethylene foam insert. The Mystrica colorimeter delivers high quality performance in a small, robust, user-friendly and affordable package. It has 3 LED light sources emitting red (630nm), green (525nm) or blue (465nm) which are easily selected using the RGB button. You can choose to measure either absorbance or transmittance with the simple press of a button. Absorbance readings are shown from .000 to 1.999 and transmittance is shown from 100.0 to 0.1%. The power switches off after 2 minutes to conserve battery life, unless it is connected to a PC, tablet or phone. This colorimeter allows the use of 12 mm test tubes as well as standard 4.5 mL cuvettes, creating a more versatile unit. Features: • Wireless connection to iPads, iPhones and Android™ devices • Mystrica Colorimeter app available on the App Store and Google Play™ • Each colorimeter has unique identity. The app detects all units within range of an iPad or iPhone and allows one to be selected • Collect data as graphs and tables • Continuous data collection or separate readings • Best fit line for rate of reaction • Email results as .csv file for analysis and storage • Fully supported suggestions for practical activities. • Power: 4 x AA batteries (not included) or via USB when connected to computer Price includes 4 colorimeters, 40 plastic cuvettes with caps, 4 cuvette stands, 25 x 12 mm glass test tubes, 2 sets of instruction sheets, 2 user manuals and 4 USB links.

Rod and disc type. Borosilicate glass. 20 discs.

Non-jointed, borosilicate glass.

Non-jointed, borosilicate glass.

Pair of rods.

Carbon rods, 100 x 5 mm. Pack of 10 rods.

Carbon rods, 200 x 8 mm. Pair of rods.

Platinum electrodes, with screw terminals. Manufactured in borosilicate glass. Length from tip of foil to tip of terminal, 114 mm.

These versatile electrode holders are suitable for holding Carbon rod electrodes as well as metal strip electrodes. They are designed to fit over 100 mL and 250 mL glass beakers, being held in place by small plastic lugs to prevent them slipping off. Resistant to corrosion, they accept 6 - 8 mm diameter cylindrical (e.g. carbon) electrodes and 19mm wide, 0.8 mm (minimum) thick metal strip electrodes. The brass connectors also resist corrosion and are compatible with the usual 4 mm stackable type lab leads. To tighten the carbon electrodes without crushing them, the setscrew is equipped with stop. • 4 mm sockets • Dimensions (L x W x H): 100 x 40 x 15 mm • Complete with 2 carbon electrodes

These 'S' shaped electrodes are convenient and easy to use simply hang them over the rim of the beaker containing the electrolyte and connect crocodile clips with 4 mm leads to them! Made from insulated brass, with a short length of carbon rod attached at the lower end and bare contact at the top for attaching crocodile clip. Supplied as a pair of electrodes.

These round electrodes will fit the electrode holder EL110620, the electrode connector EL150426, and rubber stoppers with hole. Diameter 6-7 mm.

These round electrodes will fit the electrode holder EL110620, the electrode connector EL150426, and rubber stoppers with hole. Diameter 6-7 mm.

These round electrodes will fit the electrode holder EL110620, the electrode connector EL150426, and rubber stoppers with hole. Diameter 6-7 mm.

These round electrodes will fit the electrode holder EL110620, the electrode connector EL150426, and rubber stoppers with hole. Diameter 6-7 mm.

These round electrodes will fit the electrode holder EL110620, the electrode connector EL150426, and rubber stoppers with hole. Diameter 6-7 mm.

These round electrodes will fit the electrode holder EL110620, the electrode connector EL150426, and rubber stoppers with hole. Diameter 6-7 mm.

These round electrodes will fit the electrode holder EL110620, the electrode connector EL150426, and rubber stoppers with hole. Diameter 6-7 mm.

Dimensions: 100 x 10 mm. Sold in packs of 10.

Each cell consists of 75 x 25 mm glass cylinder with 2 hole rubber stopper fitted with carbon electrodes. Electrical contact is made through the crocodile clips and a piece of insulating material between the electrodes prevents short circuiting. The gases evolved are collected in two 75 x 10 mm test tubes suspended over the electrodes by piece of wood and rubber bands (not supplied).

Spare glass tube for EL06891.

Spare carbon electrodes for EL06891.

This kit uses the juice within lemon as an electrolyte in an oxidation-reduction reaction to produce useful electricity sufficient to power clock. The electrodes must be sanded clean between each attempt. Requires lemons to make ""batteries"" in series to generate sufficient voltage to power the clock.

Consisting of an inverted U-tube with its ends closed by sintered discs. Dimensions (Diameter W x H): Arms 13 x 80 x 100 mm.

This set allows students to experiment with the characteristics of primary cells (voltaic cells). By using different electrodes and electrolytes, various voltaic cells can be made and tested. The set contains various different electrodes, including zinc, lead, aluminium, carbon, tin, copper, nickel and iron. Also included are a plastic cell container with electrode holders and porous pot. Instructions included. Dimensions: 100 x 20 mm (approx.).

Suitable for use with EL180875 and EL180877.

Comprises three parallel tubes, joined at the bottom with a horizontal tube. The central tube has a funnel for filling with water, and the side tubes have open ends at the bottom to allow bungs that hold electrodes to be fitted, and jets with stopcocks at the top for collecting gas in test tubes. The side tubes are graduated 0-50 x 0.2 mL so that the volume of gas in each can be measured. Clamps and support base (sold separately) are recommended so the unit can be mounted on retort rod.

Comprises three parallel tubes, joined at the bottom with a horizontal tube. The central tube has a funnel for filling with water, and the side tubes have open ends at the bottom to allow bungs that hold electrodes to be fitted, and jets with stopcocks at the top for collecting gas in test tubes. The side tubes are graduated 0-50 x 0.2 mL so that the volume of gas in each can be measured. Clamps and support base (sold separately) are recommended so the unit can be mounted on retort rod.

For student experiments. Embedded platinum electrodes are connected via 4 mm sockets. Two miniature test tubes are included for gas collection.

Shade welding filter lenses, as recommended for safe viewing of burning magnesium etc. Sold as pack of 10 filters.

Shade welding filter lenses, as recommended for safe viewing of burning magnesium etc. Sold as pack of 10 filters.

Cobalt blue. Dimensions: 75 x 50 mm.

Fused into glass handle.

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.