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Product Features
• Fully-automatic operation
• High-purity, pyrogen-free output
• Low-temperature distillate
• Operates from any raw water supply
• Reservoir level control
• Simple conversion to pre-treated feed
• Supplied with wall mounting bracket
• Safety features allow unattended operation
• Simple to clean
Delivery options
At Cadmus Products, we prioritise efficient order delivery and offer competitive shipping rates worldwide. Our streamlined process ensures clarity and reliability for all your shipping requirements.
- We handle consignments of various sizes across the UK and globally, primarily using DHL, but may select other couriers for specific needs.
- For online laboratory product purchases, shipping costs are displayed at checkout. For quoted items, shipping prices will be included in your email quote.
- Please visit our shipping and delivery page for more information here.
Cole-Parmer® StuartTM mWater Stills - WS-200A-4, WS-200AD-4 & WS-200A-8
The cabinet-style water stills are available in 3 models for single or double distillation of water. The high-quality borosilicate glassware, coupled with silica sheathed heaters, produces pyrogen-free distillate from virtually any raw water supply. The unique condenser ensures a ready-to-use cold distilled water supply. The design of the units ensures maximum energy efficiency, while the built-in “clean” function enables easy cleaning without the need for dismantling the glassware. The flow-sensor can detect reduction in the flow of cooling water and adjust the stills to run normally even with a low-pressure water supply, protect the units from overheating and damage. These water stills are simple and safe to assemble; both the acrylic safety screen and the cabinet lid can be removed for easy access to the glassware components.
WS-200A-4
Operated from the laboratory bench or wall mounted to save space. Produces 4 L of single-distilled water per hour.
WS-200A-8
Ideal for larger laboratories; the glassware is enclosed in the cabinet and the unit can also be operated from the laboratory bench or be wall mounted to save space. Produces 8 L of single-distilled water per hour.
WS-200AD-4
Suitable for producing high purity double-distilled water. The first distillation step is carried out in a glassware set mounted at the front of the cabinet, which can be easily accessed for descaling. The water is then fed into a second set of glassware at the rear of the device and distilled for a second time. Water level sensors to ensure the heater is only activated when there is enough water in the boiler. Produces 4 L of higher purity double-distilled or 8 L of single-distilled water per hour.
Cole-Parmer® StuartTM Water Stills - WS-200A-4, WS-200AD-4 & WS-200A-8 Technical Specification
| Specification | WS-200A-4 | WS-200A-4 | WS-200A-8 |
| Output, l/hr | 4, single | 8, single | 4, single |
| pH | 5.0 – 6.5 | 5.0 – 6.5 | 5.0 – 6.5 |
| Conductivity, μScm-1 | 1.0 – 2.0 | 1.0 – 2.0 | 1.0 – 1.5 |
| Resistivity, mOhm-cm | 0.5 – 1.0 | 0.5 – 1.0 | 0.7 – 1.0 |
| Temperature, C | 25 - 35 | 25 - 35 | 25 - 35 |
| Pyrogen content* | Pyrogen free | Pyrogen free | Pyrogen free |
| Water supply | 1 l/min 3-100psi (20-700kPa) | 2 l/min 3-100psin (20-700kPa) | 2 l/min 3-100psi (20-700kPa) |
| Electrical supply | 220 or 240V, 50-60Hz, single phase | 220 or 240V, 50-60Hz, single phase | 220 or 240V, 50-60Hz, single phase |
| Max. power, kW | 3 | 6 | 6 |
| Dimensions, mm (w x d x h) | 550 x 240 x 410 | 550 x 240 x 410 | 550 x 240 x 410 |
| IP Rating | 21 | 21 | 21 |
NB: Conductivity and resistivity are affected by the presence of dissolved carbon dioxide in water. All figures given are based on tests carried out free from carbon dioxide at 20°C.
*Care is required to produce pyrogen free water and the output should be tested before use.
Cole-Parmer® StuartTM Water Stills - WS-200A-4, WS-200AD-4 & WS-200A-8 Ordering Information
| Description | Ordering Number | Series No. | Model No. | Legacy Sku. |
| Water Still 4L/HR IEC | 99294-05 | WS-200 | WS-200A-4 | A4000 |
| Water Still 220V | 99294-00 | WS-200 | WS-200A-4-220 | A4000/220 |
| Water Still 4LT/HR DBLE IEC | 99294-15 | WS-200 | WS-200AD-4 | A4000D |
| Water Still 4LT/HR DBLE IEC 220V | 99294-10 | WS-200 | WS-200AD-4-220 | A4000D/220 |
| Water Still 8L/HR IEC | 99294-25 | WS-200 | WS-200A-8 | A8000 |
| Water Still 8L/HR IEC 220V | 99294-20 | WS-200 | WS-200A-8-220 | A8000/220 |
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