Evoqua LaboStar PRO and PRO TWF ultrapure water system
This compact system provides you with ultra-pure laboratory water for demanding applications and analyses without any detours. Thanks to the integrated tank (for TWF variants), you also have the option of implementing all process steps from pre-filtration to ultrapure water extraction in a unit that takes up minimal space. Similar systems such as the [Thermo Scientific Barnstead GenPure xCAD Plus] offer comparable purity levels, but the model presented here impresses with its flexible installation and fast commissioning. It also impresses with innovative filtration concepts that deliver particularly high pure water quality in accordance with ASTM Type I, CLSI and ISO 3696 Type I.
Efficient pure water treatment and ergonomic design
Due to its sophisticated design, the system is so quiet that it can be operated directly at the workplace without any problems. The practical dispensers enable precise removal of the ultrapure water, which flows into the outlet head via the permanently monitored recirculation circuit. A positively charged 0.2 µm sterile filter ensures that bacteria and endotoxins can be reliably retained. Those who do not require endotoxin separation, on the other hand, have the option of selecting a neutral 0.2 µm filter. Similarly equipped systems such as the [Thermo Scientific Barnstead LabTower RO] also work with filtration stages, but often require more space or do not offer the same flexibility in terms of tank size.
To meet different purity requirements, different variants are available. The TOC content of DI models is usually between 5-10 ppb. If the UV versions are used, the TOC value drops to 1-5 ppb. With these parameters, the system is particularly suitable for highly sensitive applications where accuracy and reliability of the water quality have top priority.
An overview of the key technical data
- Production rate: Up to 1.5 liters per minute (TWF versions deliver 1.2 liters per minute)
- Conductivity (µS/cm): Typically 0.055, corresponding to 18.2 MΩ-cm
- TOC range: 1-5 ppb (UV versions) or 5-10 ppb (standard models)
- Endotoxins: < 0.001 EU/ml when using the loaded sterile filter
- Pressure range for tap water supply (TWF): 3-5 bar
The other specifications depend on the individual model variants. All systems are designed for low operating costs. Changing modules is particularly easy thanks to quick-release couplings.
Type I and III in one step
The TWF line offers two water qualities: You draw type III water from the storage tank, while having type I water available at the same time, without additional components. This ensures that both purity classes are available at all times for small to medium requirements. Depending on requirements, the integrated tank can be replaced with 30 L or 60 L variants to expand capacity.
Standards and certifications
The pure water quality exceeds international standards such as:
- ASTM Type I
- CLSI
- ISO 3696 Type I
These standards prove that the water obtained is free of particles, organic substances and microorganisms, so that even sensitive laboratory procedures - such as HPLC, ICP-MS or molecular biology work - can be carried out cleanly and with repeat accuracy.
Typical areas of application
- Production of injection or analysis samples in pharmaceutical and life science laboratories
- Preparation of sensitive water for microbiological tests and cell cultures
- Quality control in industrial processes where reliable water purity is essential
- Supply basis for spectroscopy methods (UV/VIS, FTIR) or chromatography systems
Depending on the application, users can additionally filter endotoxins (e.g. for cell culture work) or require high TOC purity (e.g. for organic analyses). The modular choice between DI or UV variants enables a configuration to suit requirements.
Frequently asked questions
How often should modules and filters be changed?
This depends on the intensity of use and the input quality. As a rule, the system itself indicates when a module change is required
What happens when the tank is empty or almost empty?
The appliance starts an automatic refill (for TWF versions) or can be filled manually (for DI versions). The ultrapure water is available again in just a few minutes.
Do you also need an ultrafilter for endotoxins?
Not necessarily. A loaded 0.2 µm sterile filter already reduces endotoxins to less than 0.001 EU/ml, meaning that a separate ultrafilter is only required in rare special cases.
Can the system be used for endotoxins?
Can the system also be used at low inlet pressure?
Yes. Some versions already work from 0.1 bar feed pressure. With the TWF versions, however, the feed pressure should be between 3 and 5 bar.
Are adaptations necessary for applications with very high TOC requirements?
Yes, ideally a UV module should be used to further reduce the TOC content. This variant is ideal for organics-sensitive analyses.
Summary
This ultrapure water system with its compact dimensions covers various purity requirements and impresses with its easy installation and flexible equipment features. In addition to quiet operation and the ability to produce two water qualities at the same time, the thorough filtration of bacteria and endotoxins should also be emphasized. Thanks to constant conductivity measurement in the recirculation circuit, the water quality can be monitored at all times. With its modular design and cost-effective operation, the system is a versatile solution for numerous laboratory, analysis and production environments.
