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| Niskin / PWS 1.7 l | Niskin / PWS 2.5 l | Niskin / PWS 3.5 l | Niskin / PWS 5 l | Niskin / PWS 10 l | |
| Length | 590 mm (C) | 765 mm (C) | 540 mm (C) | 640 mm (C) | 1040 mm (C) |
| Width | 165 mm (A) | 165 mm (A) | 185 mm (A) | 185 mm (A) | 185 mm (A) |
| Height | 140 mm (B) | 140 mm (B) | 210 mm (B) | 210 mm (B) | 210 mm (B) |
| Diameter | 90 mm (D) |
90 mm (D) |
140mm (D) | 140 mm (D) |
140 mm (D) |
| Sample volume | 1.7l | 2.5 l | 3.5 l | 5 l | 10 l |
| Weight on air | 3 kg (empty) | 3.5 kg (empty) | 3.7 kg (empty) | 3.6 kg (empty) |
5.5 kg (empty) |
| operational temperature | -2 to +60 °C | -2 to +60 °C | -2 to +60 °C | ||
| product ID |
436 300 | 436 302 | 436 303 | 436 305 | 436 315 |
Plastic Water Sampler PWS
Niskin-Type Plastic Water Sampler9 ₫
PWS features all plastic (PVC) design, consisting of a tube with two lids connected by a latex rubber tubing. The lids are kept open during descent, caring for a fair flushing of the sampling tube. The sampling tube is completely metal-free.
The PWS on the one hand is the standard oceanographic sampler to be used on Multi Water Sampler/ Rosette/Carousel arrays and on the other hand it can be used as single or series instrument connected to a hydrographic wire. When used on a wire, a messenger (not incl.), dropped down the wire from the surface, releases the end stoppers for closure. For the use of several PWS in a row a second messenger below the first sampler is used to actuate a series of samplers along the wire.
When operated as a single instrument without bottom weight, we recommend to use a Centered Mounting Rack (436 380/ 436 385/ 436 386/) which cares for a vertical position of the sampler. Retrieve the water sample via the discharge cock/ tube at the lower end of the sampler.
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