Mercury Free Certification Laboratory for Navy Parts
We Provide Cost Effective Mercury Free Certification required for Naval Contract and Purchases
Mercury Instruments USA maintains a full service mercury free certification laboratory to help manufactures and suppliers cost effectively certify that their parts and supplies are Mercury Free when it is required by their Naval Contract.
For certain contracts the Navy requires parts to be certified as Mercury Free - The Navy states that material supplied under this contract/purchase order is intended for use on submarines/surface ships and therefore shall contain no metallic mercury and shall be free from mercury contamination. Mercury contamination of the material will be 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 specifically 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 name and location of that part.
The use of mercury, mercury compounds or mercury-bearing instruments and/or equipment in a manner which 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 MI USA Mercury Free Certification Laboratory is equipped with the VM-3000 Mercury Vapor Monitor measures 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 Sniffer as well as university researchers or safety people. It is a great tool for plenty of different applications: work place monitoring, exhaust air monitoring, emissions monitoring in the chemical industry, ground air screening of contaminated areas, quality control of hydrogen and other gases, detector for laboratory applications.
Mercury Vapor Analyzer Measuring Principle for Navy Certification
The sample gas is fed into an optical cell by a maintenance-free membrane pump. A beam of UV light passes through the optical cell, a part of it is absorbed by the mercury atoms present in the sample. This method is called "atomic absorption spectroscopy" or shortly AAS. It is extremely selective and sensitive. For mercury determination the AAS method has maintained its importance even if other methods have been worked out since the early beginnings. The AAS method is low in interference and does not require an amalgamation step or expensive carrier gases.
Analytical Performance of Mercury Vapor Monitor for Navy Contracts
The VM-3000 uses a high-frequency driven electrodeless low pressure mercury lamp as UV source. This lamp emits lines of an extremely narrow bandwidth which are congruent with the absorption lines of the Hg atoms. Cross-sensitivities are thus minimized. The extremely high stability of the UV source in the VM 3000 is a result of the reference beam feedback control method. Total background noise is less than 0.1 µg/m³.
VM-3000 Mercury Vapor Monitor Technical Specifications
- Measuring Principal: UV-Absorption
- Wavelength: 253.7 nm
- UV Source: electrodeless low-pressure mercury lamp
- Stabilization Method: reference beam and thermal
- Measuring Ranges:
- 0 to 100 µg/m³ (0-10 ppb)
0 to 1000 µg/m³ (0-100 ppb)
0 to 2000 µg/m³ (0-200 ppb)
- Sensitivity: 0.1 µg/m³ (0.01 ppb)
- Computation of mean value: automated via three freely selectable time intervals
- Response Time (99% signal): < 1 second (no measuring cycles or regeneration required)
- Alarm: 3 levels programmable
- Pump: Membrane pump, approx 2 L/min optional flow meter with alarm message
- Filter: PTFE, 1u, 47-50 mm diameter
- Power Supply: 230 V / 50/60 Hz (110... 120V / 50/60 Hz optional)
- Status Alarms: measuring cell soiled, battery state (option - UV source exhausted)
- Measurement Display: graphical LC display with background illumination
- Signal Outputs: 4...20 mA; RS 232 for PC or printer
- Battery Options: external 12 DC source; optional 12 V batteries integrated, ca. 5h capacity
- Power Consumption: 40W
- Weight: 15 Lbs
- Dimensions: 17.7 " wide x 5.9" High x 13.7" deep