Thermo Barnstead 7155 Reverse

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Item: 5658H WATER


All products ship from our 30,000 sq. ft. Haverhill, MA warehouse

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90-Day Warranty

American Instrument Exchange
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1023 Western Ave.
Haverhill, MA 01832

Phone: 978-521-2221
Fax: 978-521-8822


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Thermo Barnstead 7155 reverse osmosis system

  • Filter not included
  • 90-day warranty

The Thermo Scientific Barnstead 7155 reverse osmosis system features intelligent controls that allow users automate operation, monitor system performance and pressure. The simple operation delivers multistep purification in a single system with a small footprint the fits any size lab and can be either wall or bench mounted. The 6L per hour system can be attached to in-house line pressure water feed.

Click here to see a video of this system on our YouTube channel. 

Reverse osmosis is the most economical method of removing up to 99 % of feed water contaminants. External pressure is applied to the more concentrated (feed water) side of the membrane to reverse the natural osmotic flow. This forces the feed water through the semipermeable membrane. The impurities are deposited on the membrane surface and sent to drain and the water that passes through the membrane as product water is, for the most part, free of impurities. A reverse osmosis membrane has a thin microporous surface that rejects impurities but allows water to pass through. The membrane rejects bacteria, pyrogens and 90-95 % of inorganic solids.

All of our equipment is used and reconditioned. Our technicians test all equipment to confirm that it operates properly and to the manufacturer’s specifications. While we can’t test for a specific analytical application, we will do our best to simulate the conditions under which the equipment will be run. If you have particular testing requirements or requests please let us know and we’ll work with you to make sure these requirements are addressed during testing.

The photos above are representative. Please bear in mind that the equipment shown is currently in storage in our warehouse and that in addition to testing each machine we will clean all the equipment thoroughly prior to shipment. We often have multiple units of each model in stock and sometimes we're unable to feature photos of every single unit. At your request, we can provide photos of the equipment in your order after it has been tested and cleaned.