Welcome to De’Osa Engineering Services

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Certified Experts

At De’Osa Engineering Services (DOES), we specialize in accurate, reliable, and fully traceable calibration for electrical test equipment. With our mobile laboratories and expert engineers, we deliver on-site services across London and the Home Counties—minimizing downtime and keeping your equipment audit-ready.

Affradable price

100% Gurantee

Award winning

24/7 Availabilty

Delivering Precision, Compliance, and Trust in Calibration

At De’Osa Engineering Services (DOES), we provide expert on-site calibration of electrical test equipment with full traceability to national standards. Our certified engineers use state-of-the-art instruments to deliver accurate results, minimal downtime, and complete customer satisfaction. With a commitment to professionalism and reliability, we ensure your equipment remains safe, compliant, and audit-ready.

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Years Experience
Trusted Clients

Reliable, safe, and efficient electrical solutions you trust.

Comprehensive Calibration Solutions You Can Rely On

De’Osa Engineering Services offers professional on-site and pick-up calibration for all major electrical test equipment. From multifunction testers to PATs, our certified engineers ensure accuracy, compliance, and minimal downtime—backed by traceable certification to national standards.

On-site calibration service that reduces downtime

De’Osa Engineering Services uses leading industries Hardware and Software to make sure our work meets the highest standards including

We provide calibration certificates traceable to National Standards, complying with BS EN ISO 10012:2003, ensuring the highest quality.

Get in Touch

Expert Calibration with Accuracy, Reliability, and Value

At De’Osa Engineering Services, we go beyond standard calibration—we provide peace of mind. With certified engineers, state-of-the-art equipment, and a customer-first approach, we ensure your testers remain accurate, compliant, and always ready for use.

Certified Expertise

Convenience

Value for Money

Full Traceability

Minimal Downtime

Hassle-free process

Proven Calibration Excellence Across Industries

We deliver reliable calibration projects across London and the Home Counties, ensuring accuracy, compliance, and minimal downtime for every client.

Our Simple Calibration Process

1

Book Your Service

Schedule your calibration with our team at a time that suits you.

2

On-Site or Collection

We arrive with our Mobile Lab or collect your testers for service.

3

Calibrate & Certify

Your equipment is calibrated, certified, and returned with full traceability.

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Project Completed

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What Our Clients Say

What Clients Say on Google – De’Osa Engineering

5.0

Flexible Plans to Fit Your Needs

Basic Plan

Consultation, Licensed Electricians, Basic Warranty

£ 100

/Month

Standard Plan

+ Priority Scheduling, Discount on Future Services

£ 150

/Month

Premium Plan

+ 24/7 Support, Environmentally-Friendly Solutions

£ 200

/Month

We're here to help—fast, friendly, and professional.

Whether you need a quote, technical support, or advice, our expert team at De’Osa Engineering Services is just a message or call away. Let us make calibration hassle-free for you.

Stay informed with our latest news and expertise.

Explore expert tips, industry updates, and in-depth guides from De’Osa Engineering Services. Our blogs are designed to keep you updated on calibration best practices, compliance standards, and innovations that matter to your business.

Why Regular Calibration of Test Equipment is Essential

Why Regular Calibration of Test Equipment is Essential

Electrical test equipment plays a critical role in ensuring both accuracy and safety on every…