FAQ
Generally, there are standards according to ASTM (American Society of Testing Materials), ISO 3696, and CLSI (Clinical Laboratory Reagent Water). At membraPure, we based the design of our systems on ASTM D1193 because this standard includes the classification with the most parameters.
Pure and ultra pure water systems, which begin with purification from drinking water, always have reverse osmosis (RO) upstream. This is followed by technologies such as mixed-bed ion exchangers, electro-deionization (EDI) cells, UV disinfection, and ultrafiltration (UF). Pure water systems with dispensers have a final filter at the outlet that removes any particles from the water.
Depending on the model and configuration, < 10 ppb (Reagent), < 5 ppb (Life Science), or < 3 ppb (Analytical). The TOC monitoring option can be integrated upon customer request. This enables the system to determine the TOC value and display it to the user on the screen.
The choice depends on the required water quality (ASTM Type I, II, or III) and the quality of the source water (drinking water, pretreated water). Daily consumption and the quality of the source water are also crucial for selecting the appropriate ultrapure water system. We always like to use the FACT formula here:
Feedwater: What is the quality of your source water?
Application: What is the application for which the water is used?
Consumption: What is your daily demand? Do peak loads need to be covered?
TOC: Is organic carbon monitoring necessary?
Our ultrapure water systems are designed for installation directly at the point of use. Additionally, the systems for Type II and Type III water can be combined with an existing ring main in the building. Several systems of this type, which have already been installed, feed a centrally located tank.
Our devices are designed for quick and easy installation. This can be carried out independently by the customer or by a service technician from us or our trading partners. Larger systems with a production capacity of more than 40 L/h require professional installation.
All that's required is a water connection, a wastewater connection, and a power connection. The inlet water temperature should be in the range of 5–30 °C. Many models can be integrated directly into existing laboratory infrastructure. Configurations for under-counter, wall-mounted, or tabletop installation are available.
Yes, many models offer a direct-feed option to supply pure/ultrapure water of the appropriate water quality to HPLC, ICP-MS or clinical analyzers and even electrolyzers for hydrogen production.
Many consumables, such as cartridges and filters, can be replaced by the user themselves. Replacing the relevant components can be explained during a commissioned installation and assembly or maintenance visit. For more complex maintenance, membraPure offers and recommends appropriate support.
We recommend annual maintenance. Cartridge replacement depends on usage and water quality. The capacities of individual cartridges are available upon request, or they are stated directly in the quote. Changing the cartridge is easy and can be done in just a few minutes. The software guides the user through the process. We recommend replacing the final filter annually.
Depending on usage, approximately 12 months. The system indicates when a replacement is needed.
These are available in stock and can be shipped within 48 hours or less after receiving your order.
Yes, of course that's possible with us. The advantage of a maintenance contract is that we'll remind you in good time about your next scheduled service, and you'll have priority over customers without a contract when scheduling appointments. You'll also benefit from better pricing.
In this case, please contact our customer service by phone or email. If we are unable to assist you remotely, we will try to dispatch a service technician to your location as quickly as possible if you are located in a German-speaking country. Our local partners will be happy to assist you abroad.