Direct-Q® 3, 5, 8 Laboratory Water Purification Systems by Merck

"Very compact and easy to use system. Can be connected directly to tap water pipe. Produce type I and type III water. Inferior performance."

"The water purifier itself is not that expensive and very good. It provides good quality water which we use in our LC-MS methods. There is also an option to get the BioPak filter which provides water suitable for microbiological applications. It is simple to use, maybe even too simple. The interface could use a do-over, as there are few buttons and one needs to press different combinations to get a measured amount of water. If used often, you get used to it, but a better solution would be preferred. With regards to the consumables, they are a bit expensive, as cost as much as the consumables for the more complex MilliQ purifiers such as the Integral series. However, as this purifier produces the same quality of water, this is understandable. Just don't expect that if this is purifier is cheaper than other models from Millipore, the consumables and maintenance will also be cheaper, because they are about the same. We didn't run into problems with the lifecycle of the consumables, using it moderately in central Romania (the water is soft to medium, definitely far from being hard). The support team in Romania is one of the most professional of any laboratory equipment providers."

"Definitely good and versatile, very easy to use. The filters last a long time and the water quality remains outstanding even if your tap water quality is poor. In Kazakhstan tap water quality is awkward (it is orange color and polluted with dust and algae). The only issue is enormous water consumption. But if water cost is low you definitely need this one."

"Perfect solution for a small research group. Can produce Type I and Type III water from tap water. Easy to setup and operate. Purification cartridge change is as easy as changing the toner cartridge in a printer."

"This product is very simple to use and it is possible to achieve RO water to wash glassware as well as ultrapure water for excellent chromatgraphic separations (LC-MS grade). The only flaw is the maintenance cost."

"After several months of market review and consultation with sales people we purchased the Direct Q 3 system for the lab. With the weekly use of 5 L of water according to the company the filter should work at least a year. In our case first filters ended after 8 months and second after 4 months. After multiple requests the company could not provide any information on the required inlet water parameters needed. Nor they could explain the problem. They continued telling us that their system is the best. After we agreed to return the system, the negotiation lasted 3 months, the company took the device but decided to reimburse only 30% of the cost . Very bad decision to buy this product and work with their tech support."

"The product has been good and reliable. The filters are expensive. I do not like the user interface on the instrument. It's very confusing a frustrating to operate the multiple buttons and combinations that must be pressed to do anything."

"Very reproducible results. Easy to use and troubleshoot. Good service when needed."

"Because we have portable field equipment that requires rinsing of glassware, having this piece of equipment to make our own purified water on site saves us quite a bit of money per year. The water from this piece of equipment is also used in the steam autoclave."