Multi Water Sampler MWS 12

This post is also available in: viVietnamese

Water Sampling System for Oceanography and Limnology
The approved Multi Water Sampler MWS 12 is an instrument designed for the collection of water samples in successive water layers. Only one operation for 12 different samples! The sturdy stainless steel array is equipped with twelve racks to which Plastic Water Samplers or Free Flow Samplers with capacities from 1.7 to 10 litres capacity can be mounted. The MWS 12 is equipped with a motor-driven release device with an integrated Depth Meter (measuring range according to customers’ requirements). The water samplers are sequentially closed in the succession of their mounting to the array (i.e. No. 1, 2, 3, …, 10, 11 and 12).
The state-of-the-art electronics, optimised in power consumption, are designed for ambient temperatures from – 40°C up to +85°C. The maximum operational water depth is 3000 metres. A special version for operational depths down to 6000 metres is available upon request. The MWS 12 is generally delivered for combined Online/Offline use and is therefore the ideal all-purpose rosette system for use on any research vessel worldwide.
The water samplers are actuated via push-button control by the mains operated Deck Command Unit. The commands for actuation of the water samplers are given via a single or multi-conductor cable between the Underwater Unit and the Deck Command Unit or PC. The Deck Command Unit is equipped with a serial port for data transfer to PC.
In case that a conducting cable is not available on board, the required sampling depth can be pre-programmed via personal computer. The actuation of the water samplers is then carried out automatically according to the pre-selected depth intervals. All measuring data are stored inside the internal data memory (16MB) during the operation and can be read out by a PC when the system is back on board.

  • Technical Data
  • Features
  • Accessories
  • Ordering Information
Dimensions 1.7 – 5 L: Ø 110 x 125 cm (dia. x h); 
10 L: Ø 110 x 140 cm (dia. x h)
Empty Weight 1.7 – 5 L: approx. 75 kg; 
10 L: approx. 85 kg
Operational Depth max. 3000 metres
Array made of stainless steel
Motor Unit made of titanium, battery powered (3 x DL 123A/3V)
Deck Command Unit metal housing for use in 19″ -rack or as table housing, not for use on deck; push-button control for closing of water samplers,
indication of sampler no., pressure, battery status, optional CTD data. 
LCD-display with LED backlight, interface for Personal Computer (RS-232), power supply: 85 – 260 V AC
Data Memory 16 MByte
Pressure Sensor
(Depth Meter)
0.0 … 3000.0 dbar ± 0.1% f.s. (standard)
  • Combined online/offline use
  • Bi-directional communication
  • Standard depth range 3000 m
  • Long distance FSK-telemetry (> 10000m)
  • Low power consumption
  • Battery operated Underwater Unit, max. voltage of 5 V at the conductor cable
  • Electronics operate from -40°C up to +85°C
  • EC-conformity (CE) EN 50081-1, EN 50082-1
  • Variant array sizes for 24 water samplers are available upon request
  • Additional sensors of various parameter
  • Special version for operational depths down to 6000 metres
  • OEM Multi Water Sampler Array for 12 Water Sampler
    of 1.7, 2.5, 5l or 10l


The CT-Set consists of one conductivity sensor, one temperature sensor and an additional electronics board which are completely integrated into the Motor Unit of the MWS 12. From the CTD data the system computes salinity, density and sound velocity according to UNESCO formulas.
436 912 Multi Water Sampler MWS 12 for 
12 Plastic Water Samplers of Free Flow water Samplers 
of 1.7 to 5 l capacity
436 913 Multi Water Sampler MWS 12 for 
12 Plastic Water Samplers of Free Flow water Samplers 
of 10 l capacity
436 300 Plastic Water Sampler PWS
Capacity: 1,7; 2,5; 5 or 10 l
436 340 Free Flow Water Sampler
Capacity: 1; 5 or 10 l
436 430 Automatic Fluid Injection 
Sampler AFIS
450 500 CT-Set for Multi Water Sampler 
Additional electronics board,
Conductivity sensor: 
0 … 65 ± 0.01 mS/cm
Temperature sensor: 
-2 … +32 ± 0.005°C
Data rate: 
1 Hz (1 data set per second)
436 812 OEM Multi Water Sampler Array for 12 Water Sampler 
of 1.7, 2.5 or 5l
436 813 OEM Multi Water Sampler Array for 12 Water Sampler 
of 10l


Check Also

Niskin (PWS) Oceanographic Water Sampler

This post is also available in: VietnameseNiskin-Type oceanographic general purpose water sampler Niskin-Type Plastic Water …

Leave a Reply

Your email address will not be published. Required fields are marked *