Caution! Sounding line will not thread through center tubes of 1200 Kemmerer bottles. If you wish to use with Kemmerers, simply attach 50-L10 Kemmerer adaptor kit to the bottom link and thread through the center shaft of the Kemmerer bottle. Be sure to secure the end of the adaptor kit with the supplied cable clamps!
Warning! Hammering or pounding corers into sediments may damage them. When entering or exiting the bottom, do not tilt. This may cause the head assembly posts and tube to bend. The PVC core tube may break if bent too much.
Head assemblies, core tubes, liner tubes, core catchers and nosepieces may be used interchangeably between:
These are professional nets for serious field work. We use genuine Nitex® cloth and multifilament nylon. But the proof is in the pudding, or – in our case – the muslin, which is more manageable under water than nylon and polyester. It moves as you move, even when wet, and protect from snags and tears!
Weighs 10 oz., just right for easy sinking, of stainless steel for durability. 200 mL volume. Drains with a pinchcock – no stopper to lose, no trapping of plankton. Best of all, it removes easily without tools by twisting the threaded top attached to the adaptor.
Beta™ Van Dorn-style bottles have rigid, white ASA plastic end seals with silicone gaskets. Amber latex tubing is used to close the bottle because it leaches fewer contaminants than the black latex tubing used on our Alpha™ bottles. It is not as durable, however. The Beta™ sampler is excellent for trace metal sampling, as there are no metal parts to touch your sampler.
When tripped by a messenger, their ASA plastic end seals snap tightly onto each end of the cylinder, producing an almost leakproof seal. A small amount of sample is always lost until a slight vacuum forms inside as the sealed sampler is lifted out of the water.
As with our Alpha™ bottles and Ekman grabs, Beta™ bottles feature a 316 stainless steel trip head mechanism for durability and high performance. They also feature a nylon safety line connecting the end seals, so if the latex tubing breaks, the end seals often remain with the bottle.
Choose between completely transparent acrylic or the more durable, less costly opaque PVC main tubes. Acrylic allows full view of the contents during your field work.
Warning: These seals close with considerable force and could cause injury. Do not operate out of the water!
Alpha™ Van Dorn-style bottles have flexible, plunger-like blue polyurethane end seals for reliable sealing. Black latex tubing is used to close the bottle because it better resists decay in sunlight and in water than amber tubing. It is the strongest elastic material to our knowledge but may leach a very few heavy metals or other contaminants. The end seals may leach trace amounts of mercury into the water sample in the range of 20 – 450 ng/L (nanograms per liter), phosphorous, and potential other contaminants. Therefore, Alpha samplers are not suitable for chemical sampling.
When tripped by a messenger, their urethane end seals snap tightly onto each end of the cylinder, producing an almost leakproof seal. A small amount of sample is always lost until a slight vacuum forms inside as the sealed sampler is lifted out of the water.
As with our Beta™ bottles and Ekman grabs, Alpha™ bottles feature a 316 stainless steel trip head mechanism for durability and high performance. They also feature a nylon safety line connecting the end seals, so if the latex tubing breaks, the end seals often remain with the bottle.
Choose between completely transparent acrylic or the more durable, less costly opaque PVC main tubes. Acrylic allows full view of the contents during your field work.
Warning: These seals close with considerable force and could cause injury. Do not operate out of the water!
The purpose of this equipment is to obtain a core sample from a lake or ocean bottom. Because the equipment is heavy, take care.
1. Attach cable from winch to corer head
2. Loop cable over end of pulley wheel on boom of crane. Use winch to gently lift corer vertically until suspended by the cable.
3. Swivel boom with corer off boat, slowly lower corer into the water with the winch. Stop just beneath the surface to let air escape from the liner.
4. Lower until it is about 5 m above the bottom. Verify depth, position.
5. Release the ratchet brake on the winch and allow the corer to free fall to the bottom. Keep hands and clothing away from cable during free fall. The cable will slacken once the corer has penetrated the bottom.
6. Wait about 2 minutes before attempting to reel in the corer.
7. Lock ratchet brake into place and reel in slack line. Do not overtighten.
8. Reel in cable until corer reaches the surface. Lay corer horizontally on deck. Place end cap on plastic liner.
6. Remove plastic liner and attach an end cap to the other end. Use a marking pen to label top and bottom of the core and its ID number.
7. Inspect sediment inside of liner. Measure and record the recovered length of core and its condition. Describe contents. Place core horizontally in a storage box. Wash off deck and corer of any loose sediment.
8. Record: Sample #________ Location__________ Date_______
Time______ Latitude____ Longitude____Depth_________
Recovered length _____________ Condition ___________
Description of core: ________________________________
Perform lab analysis of core
1. Stratigraphic description (describe on cm scale the record of sediment layers in terms of composition, particle size, color etc.
2. Chemical and/or organic analyses performed (list type and results)