英国DCVG( DC Voltage Gradient Technology and Supply Ltd) 
英国DCVG公司是全世界DCVG技术的鼻祖，其研发的DCVG（直流电压梯度）设备最初用于英国的军用检测，只需另配上直流供电电源就可以检测埋地管道情况。在生产过程中，注重的是在保证足够简单轻便的前提下做到仪器质量好和结构强度大。DCVG公司具有20多年的仪器设计、制造、使用、数据分析的丰富经验，更重要的是几千处应用DCVG仪器检测出来的防腐层破损的案例，因此作为DCVG设备的供应商，我们能够通过详尽完善的课程向用户提供无与伦比的DCVG电压梯度专业知识和技能。
DC Voltage Gradient Technology and Supply Ltd. is the worlds leading company in DC Voltage Gradient Technology with very active research into the technology and the design and manufacturing of DCVG and CIPS survey instruments.

The original inventor of the DCVG technique way back in the early 80s was an ex Telecom engineer, John Mulvany. John worked extensively with Dr. John Leeds of DCVG Ltd. in the early 80s in developing and proving the technology through hundreds of Km of survey and more than 1000 excavations. DCVG Ltd. began manufacturing advanced DCVG equipment in UK in 1994 and has supplied equipment to more than 55 countries around the world with some companies having more than 20 sets.

DCVG Ltd. is also market leader in running Training Courses in DCVG Technology Transfer of survey techniques so companies can do their own surveying. In this respect many companies competitive to the PIM/DCVG/APRT Group in field surveying actually use our equipment.

The DCVG, PIM, APRT Group is...

In United Kingdom.
Pipeline Integrity Management Ltd.
A Pipeline Surveying and Software Development Consultancy

Active Pipeline Refurbishment Technologies Ltd
A Pipeline Engineering, Surveying and Software Development Consultancy.

Integrity Management Software Ltd.
Software development.

DC Voltage Gradient Technology and Supply Ltd
A Pipeline Survey Equipment Manufacturer and Supplier.

The Group is dedicated to the provision of high quality services supported by continual research into the technologies and services it provides so that it can offer the most advanced pipeline integrity management activities to its many clients for use in the ECDA concept