For certain contracts, the U.S. Navy requires parts to be certified as mercury-free. The Navy states that material supplied under this contract or purchase order is intended for use on submarines or surface ships and therefore shall contain no metallic mercury and be free from mercury contamination. Mercury contamination of the material will be a cause for rejection.

If the inclusion of metallic mercury is required as a functional part of the material furnished under this contract, the contractor shall obtain written approval from the Procurement Contracting Officer before proceeding with manufacture. The contractor's request shall explain in detail the requirements for mercury, identify the parts to contain mercury, and explain the method of protection against mercury escape. Such a request will be forwarded directly to the Procurement Contracting Officer with a copy to the applicable Government Inspector. Upon approval by the Contracting Officer, the vendor will provide a "Warning Plate" stating that metallic mercury is a functional part of the item and will include the name and location of that part.

The use of mercury, mercury compounds, or mercury-bearing instruments and/or equipment in a manner that might cause contamination in the manufacture, assembly, or test of material on this contract is prohibited. The most probable causes of contamination are direct-connected manometers, mercury vacuum pumps, mercury seals, or the handling of mercury in the immediate vicinity. Mercury switches, mercury in glass thermometers, standard cells, and other items containing mercury may be used if they are located so as not to constitute a contamination hazard.

If external contamination by metallic mercury occurs or is suspected, Mercury Instruments USA provides the required analysis to determine whether contamination by metallic mercury exists or whether corrective cleaning measures have been effective, and we provide you with a mercury-free certification and comprehensive data package.

The Mercury Instruments USA mercury-free certification laboratory is equipped with the VM-3000 Mercury Vapor Monitor, measuring the mercury concentration in gases continuously. It is used in the laboratory or can be installed at places where mercury has to be monitored. Industry people use the VM 3000 Mercury analysis tool, as well as university researchers or safety people. It is a great tool for plenty of different applications: workplace monitoring, exhaust air monitoring, emissions monitoring in the chemical industry, ground air screening of contaminated areas, quality control of hydrogen and other gases, and a detector for laboratory applications.