RMD LPA-1 XRF Spectrum Analyzer
for Conducting Lead-Based Paint Inspections
How does XRF work?
- The surface to be measured
is irradiated with gamma rays that excite the emission of K shell x-rays.
The gamma ray source in the LPA-1 is an isotope of cobalt, Co57.
The x-rays are then collected by a solid state radiation detector within
the analyzer. The lead concentration is then computed and displayed
- The LPA-1 method of measurement
is based on the spectrometric analysis of lead K-shell x-ray fluorescence
in a controlled depth of paint. K-shell energy can easily go through
the paint without being affected by different thickness and composition
of various layers of paint that can cause false readings. Controlled
depth used in the design of the LPA-1 XRF Lead Paint Analyzer restricts
the penetration of the energetic K-shell x-rays into the substrate.
The system cannot be misled by the presence of lead pipes or other objects
located deep in a wall.
What makes the LPA-1
- In designing the LPA-1, RMD,
now Dynasil Products, worked with government agencies and the inspection
community to understand the issues facing the lead paint inspector.
Productivity and portability consistently came back as themes in almost
all of the discussions. Utilizing their extensive knowledge in
microprocessor based analytical instrumentation, the engineers designed
an intelligent instrument that acquires and analyzes data simultaneously.
In addition, the LPA-1 is a true spectrum analyzer. While some
instruments require the user to visually evaluate a spectrum and interpret
results, the LPA-1 is intelligent enough to acquire a spectrum, interpret
it, and compute a result without help from the user. The LPA-1
performs this process faster and more accurately then can possibly be
done by the human eye giving it astounding speed of measurement.
How long is the half
life for CO57 and when do I resource the instrument?
How much radiation is an
operator exposed to by the LPA-1?
- The half life for CO57 is
approximately nine months (272 days). The source will decay at
the same rate whether the instrument is used once or a million times.
It is not necessary, however, to change the source after one half life.
The source in the LPA-1 can be used well beyond nine months. In
fact the instrument’s intelligence will automatically adjust for the
age of the source in Quick Mode or when using the Time Corrected Mode
during calibration checks. The recommended source change is 15-18
Has the LPA-1 been issued
a Product Characteristic Sheet (PCS)?
- The LPA-1 Analyzer contains
a maximum of 12 mCi (millicurie) of Cobalt 57 (Co57) radioactive material
sealed, and housed in a tungsten shield inside the instrument.
The source can only be exposed when the system is in contact with a
surface. The low activity of the source and the shield, along
with proper operation results in no radiation hazard to the operator.
The radiation dose rate at the operators hand is approximately 0.3 mRem/hr
(Millirem per hour) with the shutter open or closed. This is substantially
below the permissible dose rate. The LPA-1 Analyzer has been through
the Device Safety Evaluation Review and is a nationally registered device.
What is required before
Dynasil Products can deliver my LPA-1?
- The LPA-1 has been issued
a Performance Characteristic Sheet (PCS). Call us to obtain a
copy. It is also available for downloading from our website, the HUD
website or by calling the HUD clearing house at 1-800-424-LEAD.
Do I have to go to Watertown
Massachusetts to be trained?
- In order to deliver any LPA-1
three items must be completed.
1. The user must receive a license or registration from the local
state agency. Some states accept a general license. (Call for the LPA-1
Specification & Licensing Requirements for instructions).
A copy of the device specific license or general license registration
approval may be mailed or faxed to Dynasil Products prior to shipment.
2. The user must complete a factory authorized training course.
The training, which is provided by an authorized representative of Dynasil
Products, can be completed in one day and is included in the purchase
3. Payment must be arranged and confirmed. Accepted methods
include, a certified or bank check, a signed and approved lease agreement,
or an institution or government purchase order.
Can I finance the LPA-1
instrument? If so, how?
- While customers are always
welcome to train and tour the facility in Watertown, MA, Dynasil Products
holds regular training sessions around the country. Contact us
for exact location and dates.
- For those who wish to finance
their purchase, Dynasil Products works through several leasing companies
to allow customers to spread out payment in convenient monthly installments.
Contact Dynasil Products for a list of lease-to-own companies.
Will the software run on my computer?
- The software is compatible
with all Windows® operating systems
What is included
in the LPA-1 Lead Paint Spectrum Analyzer Package?
- LPA-1 XRF Analyzer
- (2) Rechargeable batteries
- Battery Charger
- (2) stabilizers
- Standard reference material
- Instruction manual
- Computer interface cable
- Windows® based software
- Software instruction
- Foam-lined carrying
- Optional portable hand
- Warranty: parts &
labor – 2 years
How long has RMD
/ Dynasil Products been in the instrumentation business?
||RMD Instruments, now Dynasil
Products, has been producing quality nuclear instrumentation since
1974, and is one of a few companies in the world with the technology
to produce Cadmium Telluride (CdTe) for commercial use, a critical
component in the detection of X-rays in the LPA-1 Analyzer.
Some of the other products include nationally recognized surgical
probes for radiological medicine and imaging, safety monitors for
nuclear power plants, systems for nuclear surveys, and quality control
instruments for analyzing composite and plastic materials. Dynasil
Products has always been committed to providing total support to their
customers through innovative products and services