MDH - Radiotelephones was established in 1977 by Mr.M.D.Hunt. He was granted the first two way radio repeater station licence in Wales by the Home Office now OFCOM.

 

The product range was broadened in the early 80's, by gaining the sole importer rights to two way radio and repeater accessories for other radio dealerships throughout the UK, from the Selectone Corporation in Hayward California and Connect Systems Inc., from Ventura California.
 
In 1988 MDH became a partnership and moved to Wales, where they diversified into designing and manufacturing wireless security and safety products.
 
In 1996 MDH were awarded a Welsh Office grant to design and develop our first security concept, the "Zone Cone".  
 
From this the "Zone" wireless alarm system was developed which responds to perimeter motion detectors, and then sends an identity code to a distant private central security monitoring station, up to 10 miles away. A mobile security guard can then be deployed to the location of the incident promptly.

 

Various designs were produced for several government agencies and a contract was won to manufacture a 'Remote Tank Target Mover' for Castle Martin Army Camp based in Pembrokeshire.
 
It wasquickly realized there was a need in the market for these battery powered wireless security and safety products.
 
The "Guard Alert" GA receiver-display unit, now called the 121Sentry enables the owner to respond to an alert from a motion sensor, smoke detector or hand panic transmitter as each has its own identity.
 
This concept was quickly taken on by local junior schools, and  numeric key fob transmitters were developed for the teachers to use, so help could be summoned without leaving the classroom.
 
The security range has been expanded to include the mrSentry system and the gateSentry  alert for premises with driveways and as an on site security and safety system.
 
We have supplied many 'Blue Chip' companies such as Shell, Plessey, Motorola, British Telecom, Radio Communications Agency, the Department of Transport, Department of the Environment in Eire, Ofgem, Trading Standards, R.A.F., OFCOM, Co-Operative Group, Police and Fire Departments and various Government Agencies throughout the U.K. and overseas.
 
Our transmitters and pocket receivers "pagers" comply with the relevant parts of BS 5839 Part 1 2002 and European radio standards.
 
Indeed, we are one of the only companies in the UK using the OFCOM licensed Distress Frequency, giving us clear airwaves, and wide, controllable building coverage. In short reliable, cost effective, and NO SERVICE CONTRACTS.
 
In 2005, MDH was bought out by customDesignTechnologies Ltd, a company with almost 20 years experience within the electronics industry.
 
With a prestigious, and growing customer base with the likes of IKEA, Abbey National Bank,Shell, and many Universities and Colleges, the product is a winner in all areas including coverage, reliability, low maintenance, no service contracts, and capital cost.
 
customDesignTechnologies' growth has been, and will be, based on our technical ability to provide custom solutions. With a team of committed, able and dedicated people. deafSentry and indeed the MDH range of lone worker distress alarms is another example of this ability and commitment.