Bio-logic Announces New Hearing Agreement with Premier Purchasing Partners, L.P.

Bio-logic Systems Corp. (Nasdaq:BLSC), a designer and
marketer of computerized medical electrodiagnostic equipment and
disposables, today announced the signing of a new agreement with
Premier Purchasing Partners, L.P., the group purchasing division of
Premier, Inc., one of the largest healthcare alliances in the U.S.
Under this multisource agreement, which is effective from September 1,
2005 through April 30, 2007, Bio-logic will offer its full range of
auditory products and related accessories to Premier's affiliated
hospital and healthcare systems.
   "With a history of innovation, and a goal of improving health and
the quality of life through providing cost-effective products and
services, we have shared values with Premier," Roderick G. Johnson,
president and chief operating officer of Bio-logic, commented.
"Bio-logic has become a leader in the hearing field by developing a
full range of products to both screen for and diagnose hearing
problems, and by partnering with other leaders in the hearing
community to bring state-of-the-art technologies to the marketplace.
This agreement enables Premier hospitals and health care providers to
continue to purchase our market leading products at very attractive
prices, and to bring high quality care at a competitive cost to the
patients they serve.
   "Bio-logic offers a fully integrated suite of products and
services for the hearing market. Launched only about a year ago, our
HALO Ear Muffin(R) has gained strong acceptance among hearing
professionals for its ease of use and baby-friendly features. The HALO
is a disposable over-the-ear acoustic coupler that can be used with
our ABaer(R) and Navigator(R) Pro M-A-S-T-E-R(R) systems, and also has
demonstrated acoustic equivalence for use with competitive products.
The ABaer is our leading infant hearing screening system, which allows
babies to be screened efficiently through the use of Auditory
Brainstem Response and/or Otoacoustic Emissions technology. The
Navigator Pro is our flexible diagnostic platform system that can
expand as we add new technologies. It can be used with software such
as Stacked ABR(TM) to detect auditory nervous system abnormality,
CHAMP(TM) for diagnosing cochlear hydrops and M-A-S-T-E-R for
diagnosis of hearing loss. Together with our educational seminars and
customer service programs, no other company provides a more complete
range of products and services for the hearing professional.
   "This new agreement with Premier, one of the leading healthcare
alliances in the nation, confirms the acceptance of Bio-logic's
product offering by their substantial user base and affords us the
opportunity to further penetrate the hearing market. We are gratified
that Premier has chosen Bio-logic as one of only two suppliers on this
significant contract," Johnson concluded.

   About Bio-logic

   Bio-logic Systems Corp., headquartered in Mundelein, IL, designs,
develops, assembles and markets computer-based electrodiagnostic
systems and related disposables for use by hospitals, clinics, school
districts, universities and physicians. The systems conduct tests that
are typically used by medical practitioners to aid in the diagnosis of
certain neurological disorders, brain disorders and tumors and sensory
disorders, including audiological and hearing screening and diagnosis.

   About Premier, Inc.

   Premier, Inc., is a healthcare alliance entirely owned by more
than 200 of the nation's leading not-for-profit hospital and
healthcare systems. These systems operate or are affiliated with
nearly 1,500 hospital facilities and thousands of other healthcare
sites. Premier provides an array of resources, including group
purchasing for more than $25 billion annually in supplies and
equipment. Premier also offers supply chain, clinical and operational
performance improvement products and services, and insurance programs.
A leader in helping hospitals improve clinical outcomes while lowering
costs, Premier maintains the nation's largest database for hospital
quality benchmarking with more than three billion patient charge
records and 2.8 terabytes of data. Premier has offices in Charlotte,
NC; Chicago, IL; San Diego, CA; and Washington, D.C.

   Cautionary Note Regarding Forward-Looking Statements

   This release contains forward-looking statements (as such term is
defined in Section 27A of the Securities Act of 1933 and Section 21E
of the Securities Exchange Act of 1934). Management has attempted to
identify these forward-looking statements by using words such as
"may," "will," "expects," "anticipates," "believes," "intends,"
"estimates," "could," "should," "projects" or similar expressions, but
these words are not the exclusive way of identifying these statements.
These forward-looking statements are based on information currently
available to management and are subject to a number of risks,
uncertainties and other factors that could cause Bio-logic's actual
results, performance, prospects or opportunities to differ materially
from those expressed in, or implied by, these forward-looking
statements. These risks, uncertainties and other factors include
general economic and business conditions, turnover in Bio-logic's
sales force, lack of acceptance of new technology by clinicians and
other health care professionals, the results of research and
development efforts, technological changes, competition, potential
changes in regulation by the FDA, costs relating to manufacturing of
products, the timing of customer orders, the ability of certain
suppliers to meet requirements, Bio-logic's performance under this
agreement and other factors detailed from time to time in Bio-logic's
filings with the Securities and Exchange Commission.
   You should not place undue reliance on any forward-looking
statements. Except as expressly required by the federal securities
laws, Bio-logic undertakes no obligation to publicly update or revise
any forward-looking statements, whether as a result of new
information, future events, changed circumstances or any other reason
after the date of this release.