B2B

Extra flexible stranded copper wire. Supplied in 25 m reel. • PVC insulated • Diameter: 2.8 mm • Max current: 6 A @ 1000V RMS

Extra flexible stranded copper wire. Supplied in 25 m reel. • PVC insulated • Diameter: 2.8 mm • Max current: 6 A @ 1000V RMS

This high quality stranded PVC-insulated equipment wire is ideal for general interconnection within apparatus. It is suitable for use with crocodile clips EL18500 EL18502. • 7 strand/0.2 mm tinned copper conductor • Overall diameter 1.2 mm • Current rating 2 A • Rating 1 kV rms 1.4 at 70°C • PVC insulation • Supplied on reels of 100 m

This high quality stranded PVC-insulated equipment wire is ideal for general interconnection within apparatus. It is suitable for use with crocodile clips EL18500 EL18502. • 7 strand/0.2 mm tinned copper conductor • Overall diameter 1.2 mm • Current rating 2 A • Rating 1 kV rms 1.4 at 70°C • PVC insulation • Supplied on reels of 100 m

10 lengths. For mains use to BS 6500.

Please note, this wire rusts very readily and will probably have some surface rust when purchased.

Supplied on reel (80% Nickel, 20% Chromium Alloy).

Supplied on reel (80% Nickel, 20% Chromium Alloy).

Supplied on reel (80% Nickel, 20% Chromium Alloy).

Supplied on reel (80% Nickel, 20% Chromium Alloy).

Supplied on reel (80% Nickel, 20% Chromium Alloy).

Supplied on reel (80% Nickel, 20% Chromium Alloy).

Supplied on reel (80% Nickel, 20% Chromium Alloy).

Supplied on reel (80% Nickel, 20% Chromium Alloy).

Single core equipment wire consisting of 6 mm diameter solid Copper core with outer PVC sheathing, giving an overall diameter of 1.20 mm. Supplied as 100 reel. 1.8 A rating.

Single core equipment wire consisting of 6 mm diameter solid Copper core with outer PVC sheathing, giving an overall diameter of 1.20 mm. Supplied as 100 reel. 1.8 A rating.

An updated version of the Worcester circuit board kit, using high quality plastic connectors with brass wire inserts to make the connections. Can be used with bench top power supply or batteries (not supplied). Neater and easier to use than the traditional Worcester Circuit Board kits, with no sharp edges. Kit contains: • 1 circuit board • 9 bulb holders • 16 bulbs • 2 push switches • 1 potentiometer • 12 connecting bars • 1 resistor • 1 coil of wire 19 swg • 1 coil of white wire 24 swg • 1 coil steel wire 28 swg • 2 red wires • 2 black wires • 2 crocodile clips • Graphite rods • Steel wool • Teacher's guide • Student activity sheets

Plain connector.

Worcester circuit board lamp connector.

Spare mounted bell push.

Circuit board only.

Deep insect net with telescopic aluminium handle and high quality mesh which is kind to delicate specimens. Suitable for use at all levels. Size of net: 720 x 300 mm dia. Extendable handle: 500-1000 mm.

For population counts and other measurements in the field. Consists of white plastic coated steel rods 500 mm long with markers at 250 mm which simply bolt together to form quadrat frame. Folds flat when not in use.

Solid square metal frame with 25 squares in total. Dimensions: 500 x 500 mm.

Superior quality plastic coated steel 100 squares. Dimensions: 500 x 500 mm.

The simplest and cheapest way to observe CO2 release! Ideal for individual student use. These respiration chambers can be part-filled with lime water or bicarbonate indicator solution, the organism or material to be tested placed in the top chamber and the carbon dioxide given off or expired can be observed by change in the solution. Observation is easy due to the transparency of the box. The apparatus consists of an external chamber with an internal sample holder which is perforated to allow the exchange of gases. This holder prevents contact between the sample and solution below. Dimensions (Diameter x H): 35 x 75mm.

Pressed steel blade on a 130 mm handle.

The broad opening of this soil sampler makes it easier to inspect the soil sample while it is still in the auger. Total length of the sampler is 63 cm long and it yields soil sample of approximately 49 cm in length with diameter of 22 mm. Made from electroplated steel.

For any number of easy instant pH checks on soil or compost in the laboratory or garden. Reads direct from soil or compost without sampling. Includes full instructions on adjusting pH to suit individual plants. pH readings for pH 3.5 to pH 9.0 instantly shown on the meter's display.

This meter ensures the right individual light and moisture conditions. Tests the moisture deep down where the roots are.

Provides quick indications of soil moisture pH and light conditions.

Set of six stainless steel nesting sieves in plastic frame. Complete with plastic lid and receiver. Mesh numbers 5, 10, 35, 60, 120, and 230.

This Hanna Soil test kit is ideal for testing and monitoring the quality of the soil. Tests include pH level, nitrogen, phosphorous and potassium. Easy to use a soil sample is mixed with water and combined with one of the chemical reagents supplied with the kit. The resulting solution is compared to the colour chart supplied to determine the concentration of the element being tested, which is indicated as low, medium or high traces (except pH, which is between pH4 and pH9, in 1pH increments). The kit comes with all the necessary components for 10 tests of each of the parameters or 25 tests 4 parameters.

Spirit filled thermometer in aluminium tube -10 to 110°C and 20 to 240°F. Length: 225 mm.

A lightweight angle and height measuring instrument. Point it at the top of building or tree, pull the trigger, and then read the angle on the protractor. Height is easy to calculate using the guide supplied

For survey field work. PVC covered wooden poles with solid steel points. Red and white graduated every 500 mm. Dimensions (L x Diameter): 2 metres 28 mm.

Simultaneously displays dissolved oxygen and temperature. Units of measure are saturation mg/L or ppm for dissolved oxygen and °C or °F for temperature. Advanced features include data hold 25 points memory auto power off automatic temperature compensation salinity and altitude compensation. Careful use and maintenance will provide years of reliable service. Easy to replace screw on membrane cap with optional extension cables. • Oxygen level displayed as Saturation or Concentration (mg/L [ppm]). • Adjustable Altitude Compensation (0 to 20,000 ft in 1,000 ft increments) • Adjustable Salinity Compensation from 0 to 50 ppt • Analogue bar graph indicates trends • Memory stores up to 25 data sets with DO and Temperature readings • Self calibration on power up • Data Hold, Auto power off, Low battery indicator • Waterproof to IP57 • Optional 1 m or 5 m extension cable • Complete with DO electrode, protective sensor cap, spare membrane cap, electrolyte and four 1.5 V batteries.

Detects Nitrate at 0, 10, 25, 50, 100, 250, 500 ppm. Supplied in vial of 50 strips.

A unique design feature gives direct reading of wind speed without the need to count revolutions. The low and high calibrations register m/s and the Beaufort scale. Can be hand held or fixed permanently.

This multifunction meter measures number of environmental conditions, as well as wide range of electronics measurement, making it an excellent general purpose meter for school science departments. Featuring auto-range, data hold, relative measurement, backlight, auto power-off, and IEC1010 CatII 1000 V Conformity. • DC voltage: 0.4 V/4 V/40 V/400 V/600 ±0.7 % • AC voltage: 4 V/40 V/400 V/600 ±0.8 % • DC current: 40 mA/400 mA ±1.2 %, 10 A ±2.0 % • AC current: 40 mA/400 mA ±1.5 %, 10 A ±3.0 % • Resistance: 400 R/4 k/40 k/400 k/4 M ±1.2 %, 40 ±2.0 % • Capacitance: 4 nF/40 nF/400 nF/4 μF/40 μF/200 μF ±3.0 % • Frequency: 10 R/100 R/1 k/10 k/100 kHz ±2.0 % • Duty cycle: 0.1 ~ 99.9 ±3.0 % • Temperature: -20 °C 400 °C ±3.0 (0.1 °C), 400 °C 1000 °C ±3.0 (1 °C) • Humidity: 30 % ~ 95 % RH ±5.0 %RH • Light: 4000 lux/40000 lux ±5.0 % • Sound level: 35 - 100 dB ±4 dB • Continuity test • Power: 9 V (6F22) x1 • Size: 185 x 85 x 44 mm

A combined temperature and humidity meter ideal for environmental monitoring. The large LCD is easy to read at distance. Simultaneous display of humidity in RH and temperature in °C or °F; 63 x 80 mm large digit LCD; Min/max memory since last reset; Impact-resistant ABS case with desk stands and wall mounting; Supplied with battery. Dimensions (L x W x D): 138 x 95 x 20 mm. • Temp range: -10°C to +50°C • Humidity Range: 25% to 98% RH • Resolution: 0.1°C, 1% RH • Power: x 1.5V AA battery (supplied); • Weight: 143g

Though the use of blood type in forensic investigation is not enough to prove guilt, it may aid in exonerating potential suspect. In this activity, students act as lab technicians and assist investigators by examining evidence collected at crime scene. Students first use a presumptive blood test to determine if a substance on a stained piece of cloth may be blood, and then determine the blood type of a sample collected at the scene. Students then compare their results to those of samples provided from two suspects. Kit contains enough materials for 10 groups. Teacher's Manual and Student Study Guide copymasters are included. Kit includes: • 40 Blood typing trays • 10 Cotton swabs • 1 Cloth • 1 bottle 70% ethanol • 1 bottle Blood detection reagent #1 • 1 bottle Blood detection reagent #2 • 4 Simulated blood samples: Victim, Suspect #1, Suspect #2, Crime Scene Evidence • 1 bottle Simulated anti-A serum • 1 bottle Simulated anti-B serum • 1 bottle Simulated anti-Rh serum

Blood typing is a method of classifying blood based on the presence or absence of specific proteins (erythrocytes), on the surface of red blood cells. Blood type, an inherited characteristic, is valuable to know in that it affects medical procedures, such as surgery and transfusions, paternity testing, as well as serving as evidence in criminal investigations. Determining blood type can help provide supporting evidence or eliminate a possible suspect's involvement in crime. This activity includes a teachers manual and a student guide and analysis copy-masters. There is enough material for 15 groups. Note: This activity uses Innovating Science Simulated Blood and is safe for classroom use. Kit Contents: • Blood typing trays • 4 Simulated blood samples: Victim, Suspect #1, Suspect #2, Crime scene • 1 set ABO/Rh blood typing anti-sera • 1 pack mixing sticks

Crime scene investigators examine the scene of possible violent crime for evidence, such as fingerprints, hair, fibre, etc. After collecting the evidence, they notice there is no visible blood. Someone sprays the area with a liquid then turns out the lights. A strange, faint glow appears in certain areas of the scene. Learn how Luminol is used in scenes like this everyday. The special Luminol formulation does not require a separate hydrogen peroxide catalyst. Simply re-hydrate and use with the simulated blood haemoglobin to show your class. This activity includes an instruction manual with suggested activities. There is enough material for several demonstrations. Kit Contents: • 1 bottle Luminol • Re-hydrating Solution • 1 bottle Luminol powder • 1 bottle simulated blood haemoglobin

ABO typing of blood left at the scene of crime can help to narrow down a list of suspects. In this experiment your students will use agglutination to identify the blood group of unknown blood samples as a step to identify a criminal. Kit Includes: instructions, control ABO simulated blood samples, unknown simulated blood samples, transfer pipettes, microtitre plate. All You Need: automatic micropipette (5-50 µL) with tips (optional). For 10 Lab Groups. Complete in 45 minutes.

High quality, non-adhesive plastic tape printed with the words 'CRIME SCENE DO NOT ENTER'. This tape is ideal for crime scene protection or other areas where forensic work needs to be carried out or is still ongoing. Simply unroll the plastic tape and it can then be tacked, stapled, wrapped or tied around suitable objects to create an instant and highly visible barrier. Dimensions (W x L): 75 mm x 100 metres.

Disposable protective suits suitable for forensics work. Size large. Sold individually.

Disposable, blue PVC over-shoes, to protect feet and help prevent cross contamination. Supplied as pack of 10.

Correctly packaged evidence is essential if reliable scientific results are to be obtained. Preserving the chain of custody is important because it maintains the integrity of the evidence. Whenever person comes in contact with piece of evidence, the contact must be documented to prove that the evidence was always accounted for and that no one tampered with it. These specially manufactured bags have many tamper-evident features, including unique bag number and printed label. These bags also have the added benefit of being leakproof.

These plain inch (15 cm) sterile dry swabs on plastic shafts, for specimen/evidence collection, come labelled for inclusion of details such as date, site and time references. Each swab comes in its own polypropylene tube for transport back to the laboratory. Sold as pack of 10 DNA-free swabs, each in its own tube.