For twenty five years, NResearch Inc. has supplied dedicated service to the analytical chemistry industry. NResearch Inc. manufactures the largest selection of miniature solenoid operated pinch and isolation valves in the industry. Their flawless engineering has resulted in six U.S. Patents that have been successfully applied to their extensive standard product line and numerous client projects. Patented designs incorporate sound engineering principals that enhance valve performance and longevity. Products are manufactured with pride in NResearch Inc. state of the art facilities by their own highly trained staff. At the time of assembly, all of their products are 100% tested and each valve is marked with its own serial number. The test results are recorded and filed for future reference. At the time of shipment, the pull-in and dropout voltage of each valve is measured and recorded. A personalized QA Certificate is generated, incorporating the final test results for your order and is included with each shipment. A limited warranty covers one year from the date of purchase. Experience has proven that when properly applied, the life of NResearch Inc. products exceeds the useful life of their client's instruments. Continuing customer service is often provided beyond the terms of the warranty. Valves span a range of applications from hand held instruments to process equipment. Valves feature orifice sizes ranging from 1.0 mm to 3.0 mm, silicone tubing ranging from 0.031" to 0.250" I.D., power consumption as low as 1.0 watt, response times from 2 ms to 20 ms, solenoid mounting and miniature size.