Scientific Technologies Inc. Announces Preliminary Unaudited Record Revenues for the Fourth Quarter and Year Ended December 31,

Scientific Technologies Incorporated (Nasdaq:STIZ), a
leading North American provider of automation safeguarding technology,
announced today that it expects to report fourth-quarter revenues
between $16.7 and $17.0 million, an 11% to 13% increase over the $15
million recorded in the prior quarter and a 24% to 26% increase over
the $13.5 million recorded in the fourth quarter of 2004. Sales for
the year ended December 31, 2005, are expected to be between $60.9 and
$61.2 million, a 4% to 5% increase over the $58.4 million recorded for
the year ended December 31, 2004.
   Joseph J. Lazzara, President and Chief Executive Officer,
commented, "We anticipate that the Company's revenue results for the
fourth quarter and fiscal year will set both a new quarterly revenue
record and a record for the fiscal year. We are very pleased that both
our Safety Products Group and Automation Products Group performed
admirably during this final quarter of 2005 to make these records a
reality, ending 2005 with an encouraging quarter."
   STI cautions that its anticipated results are preliminary and
unaudited, based on the best information currently available, and are
subject to the completion of preparation of the financial statements
and the audit of its year-end financial results. STI expects to
announce final results of operations for the year ended December 31,
2005, on or about March 10, 2006.

   About Scientific Technologies Inc.

   Scientific Technologies, Inc. (STI) is a North American leading
provider of automation safeguarding products and services through its
Safety Products Group. STI's Optical Sensor Division (OSD) provides
safety products that are used to protect workers around machinery,
automated equipment and industrial robots. Our products serve a wide
variety of applications and markets, including semiconductor,
automotive, electronics manufacturing, packaging and consumer markets.
STI's Machine Services Division (MSD) provides safety services such as
safeguarding equipment installations, machine safety assessments, and
the design and custom fabrication of guarding solutions. MSD
specializes in machinery services, including the repair, relocation,
installation and service of fabricating machinery. MSD serves
customers in a variety of industries, including metal fabrication,
aerospace, electronics, building materials, automotive and food
processing. Our web site is located at www.sti.com
   STI's Automation Products Group serves the factory automation,
semiconductor, transportation, oil and gas, consumer and food
processing industries with a diversified offering of sensing
technologies. Products include level, flow, pressure sensing,
positioning transducers, vehicle separation, profiling and ultrasonic
sensors and controls. Further information is available at the Group's
web sites: www.automationsensors.com and www.stiscanners.com.

   Forward-Looking Statements

   Certain statements in this press release, including statements
regarding preliminary, unaudited revenue figures for the fourth
quarter and full year ended December 31, 2005, are forward-looking
statements that are subject to risks and uncertainties. These risks
and uncertainties, which could cause STI's results to differ
materially from the forward-looking statements, include: economic and
political conditions in domestic and international markets; declining
market demand for industrial safety and security products generally;
introduction of or increased demand for alternative products;
potential errors, defects, design flaws or other problems with our
products; changes in regulations relating to industrial safety and
security products; and the other risks detailed from time to time in
STI's Securities and Exchange Commission filings and reports,
including STI's annual report filed on Form 10-K and quarterly reports
filed on Form 10-Q. STI disclaims any obligation to update information
contained in any forward-looking statement.