Brandt Instruments representing PROTEC Instruments LPA-1 XRF lead paint spectrum analyzer system for lead paint inspections

Environmental Monitoring, Safety and EH&S Instrumentation
Representing PROTEC Instrument Corporation's
XRF Lead Paint Inspection Analyzer System
RMD is Now PROTEC Instrument Corporation

  Home Protec Protec LPA-1 XRF Lead Paint Analyzer Technical Specifications

PROTEC Instrument's RMD LPA-1 Lead-Based Paint XRF spectrum Analyzer for measuring lead in paint on any surface

PROTEC Instrument Corporation's
XRF Lead Paint Inspection Kit

Analyzer Technical Specifications

Photo of the RMD LPA-1 XRF taking lead paint readings in Quick Mode

LPA-1 Analyzer


    Performance Specifications
    Precision of Results
    Wood, Drywall  ±0.05 mg/cm2
    Concrete, Metal  ±0.10 mg/cm2

    Accuracy of Results

    Wood, Drywall  ±0.05 mg/cm2
    Concrete, Metal  ±0.10 mg/cm2

Instrument Characteristics

    Depth of Penetration No Interference from objects (lead pipes, etc.) beyond 3/8"
    Substrate Effect Automatic Substrate Compensation (Spectrum Analysis)
    Detection Technique  X-Ray Fluorescence (XRF), K-Shell Analysis
    Weight <3 lb. Total (one piece unit includes 1lb battery pack)
    Ergonomic Grip-handle for ease of measurements & limited operator fatigue.
    Measurement Area The face print is smaller than 1.5" X 1.25".
    System battery life 8 hours of normal usage between charges for each battery
    Battery Charge Time  1.5 hours
    Operating Temperature 20-120°F
    X-Ray Source Cobalt-57 (max 12mCi, 444MBq)

Radiation Safety Features

    Manual Shutter Lock The shutter will not open when the manual shutter lock is activated.
    Key Lock A key activated trigger lock renders the trigger inoperable.
    Optical Sensors Ensure that the bezel of the instrument remains flat against the surface before the shutter can be opened or operated.

Radiation Source

    Cobalt-57 (Min. 10 mCi, Max. 12 mCi, 444 MBq)
    PROTEC Instrument Corporation's RMD LPA-1 analyzer radioactive source is a 12 mCi, Cobalt 57 isotope. Co-57 gamma ray energies (122 Kev) are more efficient (at least 10 times) than those of Cd-109 (22-26 Kev and 88 Kev) source for production of K-shell lead x-rays, which are recommended by HUD chapter 7 for measurement of lead in paint. Therefore, the measurement time is shorter using a Co-57 source


    The LPA-1 analyzer utilizes a "room-temperature" detector, CdTe, for its x-ray analysis that operates in a wide, 20-120° F, thermal range without any cooling requirements. The LPA-1 analyzer's ability to operate without cooling eliminates a cooling down period for stability at the beginning of a job that would result in extra time added to inspections.


    The LPA-1 XRF system has the capability of setting abatement levels from 0.4-2.0 mg/cm2 for automatic determination of the lead condition as either positive or negative with 95% confidence according to a PCS approved mode of operation.


    The LPA-1 can data log up to 4000 data points and is easily down loaded through an RS-232 serial interface port for report generation with the WindowsTM based Report Generation Software.


    The WindowsTM based interactive graphic software is considered to the most comprehensive, universally applicable lead paint report generation system available. The software is included in the LPA-1 instrument package and upgrades are free for as long as you own the instrument.


    2-year parts and labor warranty with a life time warranty on the calibration of the instrument. Protec Instruments also offer upgrades of the software and system upgrades free of charge for as long as you own your instrument.
All claims of performance are verified by the Performance Characteristic Sheet, Edition No.5, December 1, 2006 developed by QuanTech, Inc., under a contract from the U.S. Department of Housing and Urban Development (HUD). 

Technical Details

The use of an XRF instrument to take measurements is a unique process, where additional information is sometimes helpful in creating a better understanding of the measurements and the process involved in realizing these measurements. Below is a group of documents that help to explain some of the technical details involved when using an XRF instrument to measure the amount of lead in paint.

PPM vs mg/cm2
This document explains the differences between measuring the amount of lead in Parts Per Million (PPM), as commonly done by a lab, compared to Milligrams per Centimeter Squared as done with and XRF instrument.

Negative Readings
It is common for an XRF instrument to display negative readings (i.e. -0.1 mg/cm2.) This document describes why this can occur.

Limit of Detection
This document details the limit of detection pertaining to the use of an XRF instrument to measure lead in paint.

HUD Performance Charcteristic Sheet in Adobe Acrobaat pdf  Format   HUD XRF Performance Characteristic Sheets


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