Microsaic Regulatory News (MSYS)

7 May 2013

Microsaic Systems plc

("Microsaic" or the "Company")

Distribution of Circular of General Meeting

Further to the Company's announcement dated 3 May 2013 announcing the conditional placing to raise up to £4.28 million, the Company confirms that the Circular containing further details of the Placing and containing the Notice convening a general meeting to be held on 24 May 2013, will be posted to shareholders today.

Copies are now available on the Company's website (www.microsaic.com).

Defined terms used in this announcement bear the same meaning as in the Company's announcement of 3 May 2013.

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About Microsaic Systems plc

Microsaic Systems develops chip-based scientific instruments for the identification of substances in solids, liquids and gases. The Company's products are based on the 'gold-standard' scientific technique of mass spectrometry (MS).

Microsaic Systems has developed a miniaturised mass spectrometer product, based on its patented, chip-based technologies (ionchip®, spraychip® and vac-chip™), that is smaller, lighter, quieter, more energy efficient and cheaper to run than conventional MS systems.

Mass spectrometry (MS) is used across multiple sectors, including government, energy, utilities, pharmaceutical, diagnostics and healthcare, environmental, food and drink, security and defence, and industrial chemicals - a combined market of $3 billion in 2012.

Microsaic Systems was established in 2001 by a team including founders from Imperial College London, and was admitted to AIM in April 2011 under the symbol MSYS.