Perimeter Security Ltd. The scaffold alarm and construction site security specialists. Wireless installation, affordable weekly hire, 24 hour response.Intruder Alarm and CCTV Installers. Security System Hire, Scaffold and Construction Site SecurityPerimeter Security Ltd is located in the Oxford area of Oxfordshire. There are at least 2 other listings in the OX44 postcode area. Scaffoldings in Oxfordshire OX44