The force says new radios will get officers out in the community more

The new digital Airwave radio system uses Tetra communication masts to send transmissions across the force area.

Critics say there is still not enough evidence to say it is completely safe.

Police said the system would enhance the force's communication and make it easier for officers to liaise with communities and report crime.

We have to be guided by Home Office scientists... at some stage you have to put yourself in their hands Stephen Pierce, Police Federation

The system will be rolled out across Cornwall first, then Plymouth, with the rest of Devon following after that.

But some sceptics, such as councillor Anne Ward, from the South Hams district in Devon, feel not enough research has been done before the system is implemented.

She said: "I've been concerned for five years because it pulses at such a low frequency, and I feel these could interfere with the human body.

"Police argue they need this emergency system - and of course they do - but it should be safe, not only for the public, but also for the police who use it."

Devon and Cornwall Police Federation chairman Stephen Pierce said he was also aware of the health issues.

He said: "Technology-wise, officers are more than happy with the system, in that it exceeds in capability than current equipment.

'Closely scrutinised'

"But there is still the question about health, as there is with mobile phones, which is a question that rages scientifically.

"We have to be guided by Home Office scientists. At some stage you have to put yourself in their hands.

"What we and the Home Office have agreed to is health screening and monitoring and the whole system being closely scrutinised."

The force's operational project manager, Inspector Mike Leach, said the new system would provide more safety for bobbies on the beat and ensure officers had radio cover across the entire force area.

He said: "What we're looking for is to give officers hand-held coverage in a small unit which they can carry with them, so they don't have to stay in their cars to keep in contact.