The RMD LPA-1 XRF Lead Paint Spectrum Analyzer

The Most Effective Inspection System Available Today...

The LPA-1 Lead Paint Analyzer is a state-of-the-art XRF spectrum analyzing system for the quantitative measurement of lead in paint on any surface. The LPA-1 Analyzer provides a fast, accurate measurement of lead content in as little as 2 to 4 seconds with a 95% confidence level, thereby assuring the highest level of productivity for an inspector.

The advanced design of the LPA- 1 represents a new generation of XRF system. By employing technological advances in the fields of electronics and microprocessors, and combining them with knowledge gained from experience with existing X-ray fluorescence technologies, the LPA- 1 can make accurate assessments of lead levels in a fraction of the time previously needed. The result is the most effective lead inspection system available today.

The LPA- 1 method of measurement is based on the spectrometric analysis of lead K-shell X-ray fluorescence within a controlled depth of interrogation. Various studies have concluded that K-shell x-ray measurement of lead in paint is more accurate and the preferred method for XRF analysis. Unlike L-shell X-rays, K-shell X-rays can easily go through the paint without being affected by the thickness and the composition of various layers of paint that can cause false readings. The controlled depth concept used exclusively in the design of the LPA- 1 restricts the penetration of the energetic K-shell X-rays into the substrate so that the system cannot be mislead by the presence of lead pipes or other objects located deep in a wall.

Extraordinary Productivity for the Inspector...

The LPA- 1 Analyzer uses a Co-57 radioactive source and an advanced, solid-state, room temperature, radiation detector to generate and detect the x-ray fluorescence spectrum of a painted surface. The spectrum is then analyzed by a microprocessor to eliminate the effects of substrate and other factors such as scattering to allow an accurate determination of the amount of lead on a surface.

The LPA-1 automatically analyzes spectrometric data in real time and differentiates the lead signal from the spectrum. The x-ray fluorescence properties are determined through calibration process and are used for automatic substrate correction and calculation of the lead content of a painted surface.

The LPA- 1 Analyzer microprocessor executes the mathematical calculations for XRF analysis, controls the system's automatic self-calibration, and monitors all other aspects of the system operation. The LPA-1 Analyzer consistently monitors its own internal spectrum and makes self-adjustments as necessary. Thus, an operator does not need to perform any system calibrations in the field.

The most intriguing aspect of the LPA-1 analyzer is its ability to make a variable time measurement with a 95% confidence level (2 sigma) based on the local regulatory action level. This method of analysis, which utilizes the advance circuitry of the LPA-1 provides inspectors with the highest level of productivity by optimizing the time required to achieve a statistically meaningful measurement. The LPA- 1 truly is an intelligent system, which requires no operator assistance or judgement for its determination of the lead content in paint.

Flexibility and Speed of Measurement...

There are three measurement modes of operation in the LPA- 1 analyzer, "Standard Mode", Quick Mode", and "Time Corrected"" . In "Standard Mode ", the operator selects a fixed measurement time which remains constant regardless of the lead signal. In "Quick Mode", the analyzer seeks the shortest period of time to assure a definitive measurement with 95% confidence (2sigma). The LPA- 1 analyzer concludes a measurement once the 2 sigma confidence level is achieved, typically between 2 to 4 seconds depending on the action level and the lead content.

For calibration check purpose, "Time Corrected" mode is provided. "Time Corrected" mode is a 30-second Standard Mode equivalent time corrected for the life of the source.

A Complete System...

The fast analysis capability of the LPA-1 analyzer is complemented with a data storage capacity of 4000 data points. After measurement the results may be transferred to a computer at the inspectors convenience via an RS-232/USB communication link. The easy to use LPA- 1 Report Generating Software creates a simulation of the actual inspection site with icons for doors, windows, steps, etc. The operator can then assign the data points to appropriate locations and obtain an immediate report complete with action levels, summary list, and a cover sheet all presented.

The LPA- 1 is a complete system with measuring capability, data storage, long battery life, fast down loading, and comprehensive report generation software. These attributes set the LPA-1 and its approach to lead paint measurement apart from all other existing units. The measuring unit weights approximately 3 lbs. and has no attachments, giving the inspector an extended range of capability.

The LPA- 1 system has gone through satisfactory CRCPD device safety reviews for distribution under both Specific and General licenses.

With the LPA- 1 Analyzer comes RMD's 30 years of experience in research and development in radiation based instrumentation, and a committed and knowledgeable staff ready to assist you in maximizing the productivity of your inspection business.