ABB 768701 336NM Optical Filter 336.6 nm for Limas UV Gas Analyzer
Overview of ABB 768701
ABB 768701 is an optical filter identified by ABB Type Designation 336NM. The component is specified as an optical filter with a wavelength of 336.6 nm and is used as a spare optical component within selected ABB process analysis systems. ABB product information associates this part with Limas series analyzer configurations, including Limas11 UV, Limas23, and Limas23 EGA systems.
Optical components are an important part of analytical instruments that use ultraviolet or other wavelength-specific measurement techniques. Within a gas analyzer, the optical path must control and condition the light reaching the measurement section and detector. An optical filter is therefore selected according to the wavelength characteristics required by the analyzer’s measurement principle.
The ABB 768701 filter is specifically identified for the 336.6 nm wavelength range. Its precise wavelength designation provides an important reference when identifying the component for an existing analyzer. The complete ABB product number should be used when checking compatibility rather than selecting a filter based only on its physical appearance.
ABB 336NM Optical Filter
The ABB Type Designation for product 768701 is 336NM. ABB catalog information describes the component as an optical filter, 336.6 nm. This makes the wavelength specification one of the primary characteristics used to identify the part.
The filter is a small optical component designed for integration into the optical system of a process analyzer. ABB product data lists a net length of approximately 3.5 cm, a net width of approximately 2.5 cm, and a net height of approximately 0.3 cm. The listed net weight is approximately 0.005 kg.
These dimensions provide useful physical identification information, but they should not be used as the only method of determining compatibility. Optical filters that have similar external dimensions can have substantially different transmission characteristics. The wavelength designation and ABB product number are therefore particularly important during procurement and maintenance.
336.6 nm Optical Measurement
A wavelength-specific optical filter is used to control the spectral content of light within an analytical instrument. In ultraviolet gas analysis, the analyzer uses optical radiation in a defined wavelength region to obtain measurement information from the gas sample.
The 336.6 nm specification identifies the optical region associated with ABB 768701. The filter forms part of the optical path and is selected according to the requirements of the corresponding analyzer configuration.
The exact measurement function of the filter should be understood in conjunction with the analyzer’s optical design and technical documentation. It should not be assumed that every 336.6 nm filter is interchangeable with every other optical filter used in a Limas instrument. Optical transmission characteristics, dimensions, mounting position, and system calibration requirements can all affect compatibility.
Applications in ABB Limas Systems
ABB product information identifies 768701 as a spare part associated with several Limas series products. Listed applications include Limas23, Limas23 EGA, Limas11 UV, and related analyzer configurations. These systems are part of ABB’s process analysis portfolio for industrial gas measurement.
Limas analyzers use optical measurement technologies to determine gas concentrations in industrial processes. Depending on the analyzer configuration, the optical system can contain lamps or other radiation sources, optical components, measurement cells, detectors, and signal-processing electronics.
The optical filter contributes to the required spectral arrangement of the measurement system. Its wavelength characteristics are therefore directly related to the analyzer’s optical configuration. When maintaining an existing Limas analyzer, the correct filter should be selected according to the analyzer model, optical configuration, and applicable spare-parts documentation.
Role of the Optical Filter
Optical filters are used in analytical instruments to selectively transmit or restrict particular portions of the electromagnetic spectrum. In a gas analyzer, this function can help establish the optical conditions required for measurement.
For an ultraviolet measurement system, spectral selectivity is particularly important because the detector response and gas absorption characteristics depend on wavelength. A filter designed for one wavelength region may therefore not provide the required optical characteristics when installed in a different measurement channel.
ABB 768701 is identified specifically as a 336.6 nm optical filter. The 336NM designation provides a concise identification reference for technicians and procurement personnel working with compatible ABB analyzer systems.
Technical Identification
The principal identification information for ABB 768701 includes the ABB product ID 768701, ABB Type Designation 336NM, and catalog description “Optical filter, 336.6 nm.” ABB product data classifies the component as a spare part and identifies it within the Measurement Products category.
The listed package dimensions are approximately 3.5 cm in length, 2.5 cm in width, and 0.3 cm in height. The product net weight is approximately 0.005 kg. These values are useful for identifying the physical form of the component and for technical documentation.
ABB catalog information also identifies 768701 as the replacement product ID associated with the older product number 0768701. This is useful when comparing historical documentation, older equipment records, and current ABB spare-part references.
Compatibility with Analyzer Configurations
ABB 768701 is listed for use with several specific Limas product configurations. The associated product data includes Limas23, Limas23 EGA, Limas11 UV, and related Limas11 UV configurations. Because process analyzers can be configured differently according to measurement requirements, compatibility should be confirmed against the exact analyzer assembly.
When checking an existing analyzer, technicians should record the complete analyzer model, serial information, installed optical configuration, and identification number of the existing filter. Comparing these details with the applicable ABB spare-parts documentation provides a more reliable method of confirming the required component.
The wavelength designation should also be retained when creating maintenance records. Recording the part as both “ABB 768701” and “336NM / 336.6 nm optical filter” helps connect the ABB spare-part number with the technical description used in analyzer documentation.
Maintenance Considerations
Optical components require careful handling because contamination, scratches, fingerprints, dust, or incorrect installation can affect optical performance. When working with ABB 768701, the filter surface should be protected from unnecessary contact and contamination.
Maintenance personnel should follow the applicable analyzer service procedures before accessing the optical assembly. The analyzer should be placed in the appropriate safe condition, and any process, electrical, gas, or optical hazards associated with the equipment should be addressed according to the system documentation.
If an analyzer develops abnormal measurement behavior, replacing the optical filter should not automatically be considered the only possible solution. The complete optical path, light source, measurement cell, detector, electronics, gas path, and analyzer configuration may also need to be evaluated according to the manufacturer’s diagnostic procedures.
Importance of Wavelength Identification
The 336.6 nm specification is an important part of the identification of ABB 768701. Optical filters are application-specific components, and a difference in wavelength characteristics can change the behavior of an analytical measurement system.
For this reason, procurement records should include the complete ABB product number rather than using a generic description such as “UV optical filter.” Including the 336NM designation and 336.6 nm wavelength provides additional technical information and reduces ambiguity when comparing components.
The same approach is useful when maintaining older ABB analyzers. Historical equipment documentation may use the former product number 0768701, while current references may use 768701. Recording both identifiers can make spare-part research more efficient.
Process Analysis Applications
ABB Limas systems are used in industrial process analysis applications where continuous or controlled gas measurement is required. Optical analyzer technology can be applied to combustion processes, emissions monitoring, process control, and other industrial measurement tasks depending on the specific analyzer configuration.
Within such systems, the optical path is an important part of the measurement chain. Components such as filters, optical sources, cells, lenses, and detectors work together to establish the required measurement conditions.
ABB 768701 is therefore best understood as a dedicated optical component within the analyzer architecture rather than as a general-purpose filter. Its 336.6 nm wavelength designation and association with selected Limas configurations provide the key information required for technical identification.
Conclusion
ABB 768701 is a 336.6 nm optical filter identified by ABB Type Designation 336NM. ABB product information associates the component with selected Limas series process analysis systems, including Limas11 UV, Limas23, and Limas23 EGA configurations.
The filter is a compact optical component with listed dimensions of approximately 3.5 × 2.5 × 0.3 cm and a net weight of approximately 0.005 kg. Its wavelength specification is an essential part of the component’s identification.
For maintenance, procurement, and analyzer service activities, the complete ABB product number 768701 should be checked together with the 336NM designation and the exact Limas analyzer configuration. This provides a reliable basis for identifying the correct optical component within the ABB process analysis system.




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