Grapnel - For sampling aquatic plants, the grapnel is a lightweight three-pronged brass hook which can be thrown very easily into the water to hook out the plants for identification. Supplied complete with 15m rope. Prongs approximately 10cm long.

Crayfish Trap Kit - Designed for the British native white-clawed crayfish, this self-assembly trap provides a quick and easy method of crayfish monitoring. Made from 4mm green plastic mesh, the traps are durable, and are supplied with a bait bag and polypropylene line for tethering. Not recommended for larger introduced species such as the Signal crayfish. NB The British native crayfish is a protected species and a licence is required for trapping. Finished trap 50cm long x 15cm diameter.

Surber Net Bag, 250um mesh - 250um nylon mesh. Length approx 0.6m

Kick Net - Kick nets are used for collecting macro zooplankton and small invertebrates in open water. Use in a sweeping motion in open water, downstream of aquatic weeds, or as a big drift net to collect floating invertebrates. In shallow water the kick net can be used to gently disturb the animals living on the bottom, and allow the current to sweep them into the net. The net should be placed at the downstream edge of the area so the current flows through it, then use a forward scooping motion to lift the net and retain the catch. This kick net has hardwood handles which slide into sleeves on each side of the net. The net removes quickly for easy transportation and storage. The net is made of Nitex bolting cloth with 500 um mesh, size 1m x 1m, with weights sewn in at the bottom.

Surber Net Bag, 1mm mesh - 1mm knitted polyester mesh. Length approx 0.6m

Lightweight Dredge - An aluminium dredge net frame for sampling mud, silt and soft substrates. Weight approx 1kg with 1mm polyester mesh dredge net bag. Please note that this is a lightweight dredge and as such is not strong enough to drag through gravel substrates.

Surber Sampler Frame - The surber sampler is suitable for quantitative sampling where the current is less than about 10cm/second. This aluminium alloy frame is fitted with nylon side screens to reduce the loss of animals from around the mouth of the net. May be folded flat for storage. Internal dimensions: 0.25m high x 0.4m NB Frame only (pictured with 1mm mesh bag, available separately)

Drift net bag, 250um mesh, closed end - The surber sampler is suitable for quantitative sampling where the current is less than about 10cm/second. This aluminium alloy frame is fitted with nylon side screens to reduce the loss of animals from around the mouth of the net. May be folded flat for storage. Internal dimensions: 0.25m high x 0.4m NB Frame only (pictured with 1mm mesh bag, available separately)

Drift net filter, 1mm mesh - The surber sampler is suitable for quantitative sampling where the current is less than about 10cm/second. This aluminium alloy frame is fitted with nylon side screens to reduce the loss of animals from around the mouth of the net. May be folded flat for storage. Internal dimensions: 0.25m high x 0.4m NB Frame only (pictured with 1mm mesh bag, available separately)

Drift net filter, 250um mesh - The surber sampler is suitable for quantitative sampling where the current is less than about 10cm/second. This aluminium alloy frame is fitted with nylon side screens to reduce the loss of animals from around the mouth of the net. May be folded flat for storage. Internal dimensions: 0.25m high x 0.4m NB Frame only (pictured with 1mm mesh bag, available separately)

Drift net bag, 250um mesh, open end - 250um mesh with open end (to take filter)

Drift net bag, 1mm mesh, open end - 1mm mesh with open end (to take filter)

Drift net bag, 1mm mesh, closed end - 1mm mesh with open end (to take filter)

Pond Dipping Net - Ideal for children, this lightweight net has a 2mm mesh net bag fitted on a 19cm diameter (approx) wire frame, with brightly coloured plastic-coated bamboo handle.

Weighted Drift Net Frame - The weighted frame is designed to be held in position with large stones or bricks. Internal dimensions: 0.25m high x 0.4m Frame only. Nets and filters available separately

Hand Net Fixings - Fixings needed to attach inner frame to outer frame.

Lightweight Hand Net - A lightweight net suitable for use in garden ponds and streams, with anodised aluminium handle/frame and a woven mesh net bag attached by press studs for easy removal for washing.

Small Hand Net 2mm mesh - Similar to the net above but with a 2mm mesh bag, recommended for amphibians.

1mm mesh bag for Small Hand Net - Similar to the net above but with a 2mm mesh bag, recommended for amphibians.

2mm mesh bag for Small Hand Net - Similar to the net above but with a 2mm mesh bag, recommended for amphibians.

Outer Frame and Handle for Small Hand Net - Wooden handle with outer aluminium frame attached.

Inner Frame for Small Hand Net - Inner brass frame to which net attaches.

Small Hand Net, Standard - Made to the same design as the Professional Hand Net, but smaller and lighter. Ideal for use by students or children, and also suitable for sampling in restricted sites by professional biologists. A very sturdy net which is light and easy to use. The wooden handle will float and is comfortable to use in cold weather. The outer net frame is aluminium alloy, and the net bag is attached by an inner brass frame to reduce wear. The high specification net bag is made from knitted polyester for extra durability.

0.5m 500um mesh bag - Made to the same design as the Professional Hand Net, but smaller and lighter. Ideal for use by students or children, and also suitable for sampling in restricted sites by professional biologists. A very sturdy net which is light and easy to use. The wooden handle will float and is comfortable to use in cold weather. The outer net frame is aluminium alloy, and the net bag is attached by an inner brass frame to reduce wear. The high specification net bag is made from knitted polyester for extra durability.

Outer Frame and Handle for Professional Hand Net - Wooden handle with outer aluminium frame attached.

Inner Frame for Professional Hand Net - Inner brass frame to which net attaches.

Hand Net Fixings - Fixings needed to attach inner frame to outer frame.

0.5m 1mm mesh bag - Fixings needed to attach inner frame to outer frame.

0.5m 2mm mesh bag - Fixings needed to attach inner frame to outer frame.

0.5m 250um mesh bag - Fixings needed to attach inner frame to outer frame.

0.3m 2mm mesh bag - Fixings needed to attach inner frame to outer frame.

0.3m 250um mesh bag - Fixings needed to attach inner frame to outer frame.

0.3m 500um mesh bag - Fixings needed to attach inner frame to outer frame.

Pro Hand Net 0.5m bag 250um mesh - Longer bag. Very fine mesh

Pro Hand Net 0.5m bag 500um mesh - Longer bag, fine mesh

0.3m 1mm mesh bag - Longer bag, fine mesh

Pro Hand Net 0.5m bag 2mm mesh - Longer bag. Mesh suitable for amphibians

Pro Hand Net 0.3m bag 250um mesh - Very fine mesh

Pro Hand Net 0.3m bag 500um mesh - Fine mesh

Pro Hand Net 0.5m bag 1mm mesh - Longer bag. General purpose mesh.

Pro Hand Net 0.3m bag 1mm mesh - Standard hand net

Pro Hand Net 0.3m bag 2mm mesh - Recommended for amphibians

Ammonia Photometer MR HI93715 - Ion-specific meters provide a quick, precise and economical way of measuring ion concentrations. These lightweight portable meters have none of the problems associated with expensive ion selective electrodes, but instead rely on an advanced microprocessor and diode photocell to measure a single photometric parameter. Inexpensive reagents make the cost per test often less than traditional chemical test kits and considerably more accurate - typically +/-4%. All units feature a large LCD display and a battery life equivalent to at least 300 tests. Supplied with 2 cuvets, caps, 9v battery and instruction manual.

Calcium Hardness Meter HI93720 - Ion-specific meters provide a quick, precise and economical way of measuring ion concentrations. These lightweight portable meters have none of the problems associated with expensive ion selective electrodes, but instead rely on an advanced microprocessor and diode photocell to measure a single photometric parameter. Inexpensive reagents make the cost per test often less than traditional chemical test kits and considerably more accurate - typically +/-4%. All units feature a large LCD display and a battery life equivalent to at least 300 tests. Supplied with 2 cuvets, caps, 9v battery and instruction manual.

TDS 1500ppm Solution Sachets HI70442P - Premixed solution for guaranteed quality and accuracy. TDS (Total Dissolved Solids) 1500ppm. 25 x 20ml sachets

Iron Meter HR HI93721 - Ion-specific meters provide a quick, precise and economical way of measuring ion concentrations. These lightweight portable meters have none of the problems associated with expensive ion selective electrodes, but instead rely on an advanced microprocessor and diode photocell to measure a single photometric parameter. Inexpensive reagents make the cost per test often less than traditional chemical test kits and considerably more accurate - typically +/-4%. All units feature a large LCD display and a battery life equivalent to at least 300 tests. Supplied with 2 cuvets, caps, 9v battery and instruction manual.

Standard Phytoplankton Net - This net may be towed behind a boat or thrown out from a jetty or bank and drawn back through the water. It has a nylon 53um mesh for sampling algae and some protozoa. Supplied complete with stainless steel frame, towing harness and 7m line. The net is open-ended and compes complete with a removeable filter. Frame diameter 25cm, 0.5m long.

Large Phytoplankton Net - This net may be towed behind a boat or thrown out from a jetty or bank and drawn back through the water. It has a nylon 53um mesh for sampling algae and some protozoa. Supplied complete with stainless steel frame, towing harness and 7m line. The net is open-ended and compes complete with a removeable filter. Frame diameter 30cm, 0.9m long.

Phytoplankton Net Filter - A 53um mesh filter which fits the plankton net to overcome the problems of organisms depositing on the net when bottles or rubber funnels are used. Organisms caught by the net are deposited on a mesh screen of the same material of the net itself. This can be unscrewed in the field and either washed off into a container for immediate re-use or dropped into a bottle for future examination.

Standard Zooplankton Net - These nets may be towed behind a boat or thrown out from a jetty or bank and drawn back through the water. The 250um nylon mesh retains small animals such as crustaceans whilst allowing most algae and protozoa through. Supplied complete with stainless steel frame, towing harness and 7m line. The net is open-ended and comes complete with a removeable filter. Frame diameter 25cm, 0.5m long

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