ABB 769117 Detector NO (Uras26)

ABB 769117 is identified as a Detector NO (Uras26) component associated with the ABB Uras26 infrared gas analyzer platform. The component is intended for nitrogen monoxide measurement within a configured Uras26 analyzer system and forms part of the optical measurement arrangement used for continuous gas analysis. Its identification is closely related to the Uras26 analyzer architecture, where the detector, optical system, sample gas path, calibration configuration, and measurement settings operate together as an integrated analytical system.

The Uras26 is an infrared analyzer module based on non-dispersive infrared absorption technology. According to ABB technical documentation, the measurement principle operates within the infrared wavelength range of 2.5 to 8 μm. The photometer can be configured to measure from one to four sample components, using one or two beam paths and one or two receivers in each beam path. This architecture allows the analyzer to be configured for different combinations of infrared-active gases according to the application.

ABB 769117 Product Overview

The ABB 769117 product designation corresponds to Detector NO (Uras26). In the context of an ABB Uras26 analyzer, the detector is associated specifically with the measurement of nitrogen monoxide, commonly represented by the chemical formula NO. The component should therefore be considered as part of the analyzer’s optical measurement system rather than as a standalone general-purpose gas detector.

Uras26 is designed for continuous measurement applications where selected gas components need to be determined through infrared absorption. ABB documentation lists nitrogen monoxide among the supported sample components and provides dedicated measurement ranges for NO. The actual configuration of an analyzer depends on the selected sample components, beam-path arrangement, measurement range, calibration method, and application requirements.

Infrared Measurement Principle

The Uras26 measurement system uses non-dispersive infrared absorption, commonly known as NDIR. Gas molecules absorb infrared radiation at characteristic wavelengths. When a sample passes through the optical measurement path, the analyzer evaluates the change in infrared radiation associated with the target gas. The resulting signal is used to determine the concentration of the selected component.

This measurement principle provides a suitable method for continuous industrial gas analysis because several infrared-active gases can be measured using the same general analyzer platform. ABB documentation identifies gases such as CO, CO2, NO, SO2, N2O, CH4, ammonia, hydrocarbons, refrigerants, SF6, and water vapor among the possible Uras26 sample components, subject to the applicable analyzer configuration.

For a configuration incorporating ABB 769117, the optical measurement arrangement is dedicated to the NO component. The detector operates within the Uras26 analytical system, while the complete analyzer determines the applicable measurement range and operating parameters.

NO Measurement Range

ABB technical documentation specifies a smallest measurement range of 0–75 ppm for NO in the Uras26 analyzer module. The documentation presents this value for the relevant Uras26 measurement configuration and also distinguishes between different measurement classes and configurations. The smallest range should therefore be interpreted as a specification of the analyzer configuration rather than as an independent universal specification for every installation.

The Uras26 documentation states that each sample component has one physical measurement range. Smaller measurement ranges can optionally be derived electronically from the physical measurement range. Up to four measurement ranges can be associated with each sample component depending on the configuration. ABB also specifies a measurement range ratio of up to 1:20.

For applications requiring zero-point suppression, the Uras26 can use electronic zero-point suppression or differential measurement based on a base level above zero with flowing reference gas. The maximum suppression ratio specified by ABB is 1:10. These functions allow the measurement configuration to be adapted to applications where the normal operating concentration does not start at the absolute zero point.

Uras26 Analyzer Configuration

The Uras26 photometer can measure between one and four sample components. Depending on the selected configuration, the optical system can contain one or two beam paths, with one or two receivers associated with each beam path. This modular arrangement allows the analyzer to accommodate different gas measurement requirements within a single analytical platform.

Because ABB 769117 is identified specifically as a Detector NO (Uras26), its correct application depends on the Uras26 configuration in which it is installed. The analyzer’s other measurement components, optical arrangement, measurement ranges, and calibration settings should be considered when identifying the appropriate detector component.

ABB documentation also specifies that measurement range switching can be performed manually, with external control or automatically depending on the analyzer configuration. Limit values can be configured during system setup, with limit-value signals available through the digital ports. These functions support the integration of the analyzer into continuous monitoring and process-control systems.

Calibration of the NO Measurement

Calibration is an important part of the Uras26 measurement system. ABB documentation describes zero-point and end-point calibration procedures for Uras26 analyzers. Depending on the analyzer configuration, calibration may use calibration cells, suitable reference gases, or span gases. The appropriate procedure depends on whether the analyzer is configured for automatic or manual calibration and whether calibration cells are installed.

For Uras26 systems without calibration cells, ABB operating documentation specifies nitrogen or suitable component-free gas for zero-point calibration, while a span gas can be used for end-point calibration. For manual calibration, the appropriate test gas can be selected for each sample component or detector. These calibration requirements demonstrate why the 769117 detector should be evaluated together with the complete Uras26 analyzer configuration.

When several sample components are measured simultaneously, the calibration sequence and potential cross-sensitivity between components can also become relevant. The calibration method should therefore follow the applicable ABB analyzer configuration and operating documentation.

Technical Characteristics

The Uras26 combines an infrared optical measurement system with configurable sample-component ranges. ABB specifies a measurement principle based on non-dispersive infrared absorption over the 2.5–8 μm wavelength range. The analyzer supports one to four sample components and provides configurable measurement ranges for the selected components.

For the documented Uras26 configuration, ABB specifies a smallest NO range of 0–75 ppm. The analyzer documentation also provides performance specifications such as linearity deviation and repeatability under defined constant operating conditions. These specifications apply to the complete analyzer measurement system and should not be interpreted as independent performance specifications of the 769117 detector component alone.

Industrial Gas Analysis Applications

Uras26 technology is suitable for continuous gas analysis applications involving infrared-active components. Nitrogen monoxide measurement is particularly relevant to applications involving combustion exhaust and emission monitoring. ABB’s broader gas analyzer documentation identifies NO measurement with Uras26 for emission measurement applications and specifies a 0–75 ppm smallest range for this analyzer technology.

Depending on the complete analyzer configuration, Uras26 can also be combined with other ABB analyzer modules when additional gas components require different measurement principles. This modular approach allows a continuous gas analysis system to be configured according to the characteristics of the process gas and the required analytical parameters.

ABB 769117 Identification

For component identification, the primary reference is ABB 769117, with the description Detector NO (Uras26). The product identification should be checked against the analyzer configuration, technical documentation, and existing component designation before installation. Because Uras26 systems can be configured with different combinations of sample components, a part number should be evaluated in relation to the complete analyzer rather than only by physical appearance.

The Uras26 platform should also be distinguished from other ABB gas-analysis technologies. ABB offers infrared, ultraviolet, paramagnetic, thermal-conductivity, and other measurement principles for different gas-analysis requirements. The 769117 reference specifically relates to the NO detector associated with the Uras26 infrared measurement platform.

Conclusion

ABB 769117 Detector NO (Uras26) is a dedicated nitrogen monoxide measurement component associated with ABB’s Uras26 infrared analyzer module. The Uras26 uses non-dispersive infrared absorption over the 2.5–8 μm wavelength range and can be configured for one to four sample components. ABB documentation specifies 0–75 ppm as the smallest documented NO measurement range for the Uras26 platform.

The technical characteristics of ABB 769117 are best understood as part of the complete Uras26 analytical system. Measurement range, optical configuration, calibration method, sample gas conditions, and analyzer settings all contribute to the final measurement arrangement. For equipment identification and technical documentation purposes, ABB 769117 provides the specific reference for the Detector NO (Uras26) component.