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VMD Fingerprint development chambers
VMD Fingerprint development chambers

 

The original metal deposition systems for fingerprint development.

Now built by HHV, the ID500 and ID750 forensic coaters are used for the detection of fingerprints using the Vacuum Metal Deposition (VMD) technique developed by the UK Home Office and Edwards in the 1960s and 1970s. Indeed the original UK Home Office specification for 600mm and later 750mm VMD systems was written around that early work. ID500 and ID750 systems are the latest developments of the Edwards originals and are now supplied and supported by HHV Ltd.

ID750 is a full-size system designed for national or regional forensic labs. The high-throughput vacuum system with water vapour cryo pump provides short cycle time and allows rapid processing of evidence. ID500 is a smaller unit designed for local agencies or where budget constraints apply.

On both systems, operation of the vacuum system and the water vapour cryo pump (standard on ID750) is managed by a rugged industrial PLC and touch-screen. Operation of the deposition sources uses traditional controls to maximise flexibility while chamber lighting provides the operator with a clear view of the process.

Both systems are supplied with enamelled work holders fur use with magnetic or wire attachment of evidence. ID750 has a standard rotary drive for cylindrical evidence, which is optionally available on ID500.

HHV Ltd has recently upgraded the control system on its compact and affordable ID500 VMD systems for forensic labs.

The ID500 now features a full-colour touch screen for automatic control of the vacuum system, plus ‘soft button’ control of the metal deposition sources and the new LED chamber lighting system. The company has also developed the ID500 control system with local language support for customers in south east Asia.

The remove-able evidence holder holds plastic sheet with dimensions up to 72cm x 56cm giving the ID500 the largest capacity among systems of similar footprint.

ID500 is built on a wheeled base for easy manoeuvring and boasts a compact footprint of 88cm wide x 70cm deep overall.

Systems are available with conventional diffusion pumping or with an optional turbo pump. ID500 retains a liquid nitrogen trap to assist with pumping water vapour from certain plastics samples. Options include a rotary evidence holder for samples such as bottles and cans.

 

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