In today’s precision-driven industries, accurate measurements are essential for maintaining operational excellence and regulatory compliance. Businesses across the UK, particularly in London, rely heavily on dependable calibration services to ensure their equipment is functioning within the required standards.
Whether you’re operating in manufacturing, pharmaceuticals, aviation, or energy, having your tools and instruments regularly calibrated is not just good practice. it’s a critical necessity. This guide explores the most reputable calibration companies in London, alongside key insights into the services offered and how to choose the right provider for your needs.
Why Is Equipment Calibration Crucial for UK Businesses?
Calibration is the process of fine-tuning instruments to ensure that their measurements remain accurate and traceable to recognised standards. For UK businesses, particularly those operating in regulated sectors, maintaining properly calibrated equipment is vital for quality control and meeting compliance requirements.
Even minor inaccuracies in measurements can lead to significant consequences, from production delays and safety risks to regulatory penalties. For example, a wrongly calibrated pressure gauge in a chemical plant could not only disrupt operations but also compromise safety. By working with a trusted calibration provider, businesses can reduce these risks and keep their operations running smoothly and safely.
What Services Do Calibration Companies Typically Provide?
Calibration companies in London generally offer a diverse range of services tailored to meet the specific needs of different industries. These include electrical, mechanical, temperature, pressure, and dimensional calibration, carried out either at the company’s own laboratory or on-site at the client’s premises.
Electrical calibration services are frequently requested by manufacturers and laboratories that rely on oscilloscopes, multimeters, and signal generators. Mechanical calibration is essential for tools like torque wrenches, micrometres, and callipers, ensuring precise performance over time. Temperature and pressure calibration services are commonly used in medical, food processing, and HVAC industries.
Some companies go beyond standard offerings by providing on-site or mobile calibration services. This is particularly beneficial for large-scale operations where equipment cannot be transported easily. Others may offer emergency calibration for situations where downtime must be minimised.
How Do You Identify a Trusted Calibration Company in London?
When it comes to selecting a reliable calibration partner, businesses should consider several important factors. Accreditation is the first and most critical element. In the UK, calibration laboratories that are UKAS accredited under ISO/IEC 17025 demonstrate technical competence and adherence to international quality standards.
Experience also plays a major role. A company that has been operating for a decade or more is likely to have refined its processes and built a reputation for consistent service delivery. In addition, it’s advisable to review client testimonials, particularly on independent platforms such as Google Reviews, which offer genuine feedback about customer satisfaction, turnaround times, and professionalism.
Service flexibility is another key consideration. Some calibration companies are known for offering tailored solutions that fit the client’s operational schedule, including weekend or after-hours service. Transparent pricing, detailed calibration certificates, and clear communication further indicate a company’s commitment to quality.
Which Are the Top 10 Calibration Companies in London?
1. Xpress Calibration – “Fast, Reliable, Certified”
Xpress Calibration is known for its speed-focused service delivery without compromising accuracy. Based in the UK and servicing London extensively, the company provides both laboratory and on-site calibration services. Their expertise spans electrical, mechanical, and environmental calibration.
Xpress Calibration is particularly popular among companies that require quick turnaround times due to operational pressures. Their customer support team is responsive, making scheduling and communication seamless. The company maintains strong compliance with recognised calibration standards. Their approach balances speed, technical accuracy, and cost-efficiency for clients across various sectors.
Primary Expertise
Rapid-response calibration services with consistent accuracy.
Ideal Use Case
Best for businesses needing urgent or short-notice calibration services.
Pricing: Competitive, quotation-based
- Website: https://www.xpresscal.co.uk
- Phone: 07 508 508 200
- Address: 7 Holland Road LONDON NW10 5AH
- Email: j@xpresscal.co.uk
Review: ★★★★☆
“Excellent service when we needed urgent calibration. Quick, efficient, and professional.”
2. Calibrate UK (PASS)– “Precision You Can Depend On”
Calibrate UK (PASS) offers comprehensive UKAS-accredited calibration services tailored to meet the stringent demands of industries throughout London. They serve sectors including aerospace companies, pharmaceutical companies, engineering companies, and manufacturing companies. Their team of experts ensures every instrument calibrated meets precise accuracy standards and traceability.
Calibrate UK provides both in-house and mobile calibration services, making it easier for clients to stay compliant with minimal disruption. Their documentation process is clear, audit-ready, and aligned with ISO requirements. Clients value the company’s commitment to technical excellence and customer communication. It’s a go-to choice for businesses seeking long-term calibration support.
Technical Excellence
Multi-discipline calibration with full UKAS traceability.
Ideal Use Case
Ideal for businesses with strict regulatory and audit requirements.
Pricing: On request, based on service volume
- Website: https://www.calibrate.co.uk
- Phone: +44 1642 931329
- Address: 1 Wilson Street, Thornaby, United Kingdom
- Email: info@pass.co.uk
Review: ★★★★★
“Reliable, professional, and thorough. We’ve worked with them for years and they never disappoint.”
3. UK Calibration – “Supporting Accuracy Across Industries”
UK Calibration delivers dependable and cost-effective calibration services throughout London, with a strong focus on small and medium enterprises. The company supports electrical, mechanical, pressure, and temperature instruments, offering both lab-based and on-site options. Their processes are designed to be simple yet highly accurate, with full traceability and clear certificates.
With a practical approach, UK Calibration appeals to companies that need reliable calibration without unnecessary complexity. They maintain strong standards and a client-first attitude. Their team is known for being punctual, communicative, and professional in every engagement.
Key Strength
Industrial and laboratory calibration tailored for everyday operations.
Best Suited For
Perfect for SMEs seeking dependable and affordable calibration.
Pricing: Cost-effective; available upon enquiry
- Website: https://ukcalibration.co.uk
- Phone: 01924 456 538
- Address: 102-104 BMK Industrial Estate, Wakefield Road, Liversedge, WF15 6BS
- Email: enquiries@ukcsltd.com
Review: ★★★★☆
“Good value and very professional. Great for small companies like ours.”
4. Lambda Cal – “Specialists in Electrical Calibration”
Lambda Cal is a UKAS-accredited laboratory known for its specialism in electrical and electronic equipment calibration. With an experienced team and advanced lab facilities, the company is capable of handling a wide range of test and measurement instruments. Their clients include engineering firms, manufacturers, and electronics labs across London.
Lambda Cal also provides on-site services for businesses with time-sensitive equipment. Their approach is meticulous, and documentation is delivered to a high standard. Customers frequently praise their technical depth and ability to handle custom calibration needs.
Service Focus
High-precision calibration of electrical and electronic test instruments.
Best Suited For
Great for technical environments with specialised testing equipment.
Pricing: Custom quotes per equipment type
- Website: https://www.lambda-cal.co.uk
- Phone: 01257 244 670
- Address: 11-13 Chorley Central Business Park, Stump Lane, Chorley, Lancashire, PR6 0BL
- Email: mail@lambda-cal.co.uk
Review: ★★★★★
“Very detailed and technically sound. They handle all our electronic calibrations perfectly.”
5. Trescal UK – “Global Expertise, Local Precision”
Trescal is a global leader in calibration services with a strong UK presence, including London. They provide multi-parameter calibration, asset management, and repair services across all major industries. As one of the few global providers with local labs, Trescal combines international standards with London-based service accessibility.
Their client base includes aerospace, defence, and pharmaceutical firms requiring strict compliance. Trescal’s digital systems make it easier to track calibration cycles, equipment status, and certificates. Their scale allows them to handle large-volume calibrations efficiently without compromising quality.
Area of Expertise
Comprehensive enterprise calibration and metrology management.
Ideal Application
Perfect for large-scale companies managing complex calibration programs.
Pricing: Enterprise pricing based on service scope
- Website: https://www.trescal.uk
- Phone: +44 (0)1252 533 300
- Address: Saxony Way. Blackbushe Business Park. Yateley. Hampshire. GU46 6GT
- Email: Through website
Review: ★★★★★
“They manage our entire fleet of instruments and do it flawlessly. Highly organised and professional.”
6. Mitutoyo UK – “Metrology Excellence”
A global name in measurement, Mitutoyo offers world-class calibration services through its UK division. In London, the company provides certified dimensional and mechanical calibration services, particularly for manufacturing and engineering clients.
Their facilities are equipped with high-accuracy tools and systems, and their staff possess deep metrology expertise. Mitutoyo’s brand strength lies in precision and reliability. They also offer training and metrology consultation. Clients choose Mitutoyo not only for the calibration service but also for the overall support in improving measurement systems and compliance.
Technical Domain
Advanced dimensional metrology and tool calibration.
Best For
Excellent for engineering firms focused on ISO and QC compliance.
Pricing: By quotation, based on equipment type
- Website: https://www.mitutoyo.co.uk
- Phone: 01264 353123
- Address: West Point Business Park Andover, Hampshire SP10 3UX
- Email: sales@mitutoyo.co.uk
Review: ★★★★★
“Precision and professionalism. They’re the go-to for any dimensional calibration.”
7. Micro Precision – “Accuracy Without Compromise”
Micro Precision Calibration offers highly specialised services with a global footprint and a strong presence in London. Their lab supports electrical, mechanical, RF, temperature, and pressure instruments. The company is known for its strict adherence to ISO/IEC 17025 standards and industry-specific compliance.
Their services are often used by companies in aerospace, medical, and research sectors. Micro Precision’s turnaround times are fast without sacrificing documentation quality. They offer both standard and custom calibration services based on customer requirements, including full traceability and certification.
Service Specialty
Multi-discipline calibration including RF and complex instruments.
Best For
Best for regulated industries and critical operations.
Pricing: Based on service level and instrument type
- Website: https://microprecision.com
- Phone: + 44 (0)1483 973821
- Address: Unit 2 Heyworth Business Park, Peasmarsh, Guildford, GU3 1AF, United Kingdom
- Email: bob.little@microprecision.com
Review: ★★★★★
“Super reliable, especially for our aerospace projects. Never a single issue.”
8. National Physical Laboratory (NPL) – “The UK’s Measurement Authority”
NPL stands at the very core of measurement science in the UK. As the national measurement institute, NPL delivers primary calibration services for clients who need unmatched precision and traceability. Located in Teddington, just outside central London, NPL’s facilities are world-class and set the standard for the entire industry.
Their services are frequently used by research institutions, national labs, and highly regulated industries. Calibration here is performed at the highest scientific level, with accuracy that influences national and international measurements.
Niche Focus
Primary standard calibration backed by scientific research.
Best For
Ideal for national labs, research institutes, and regulatory bodies.
Pricing: Premium; project-based quotation
- Website: https://www.npl.co.uk
- Phone: 020 8977 3222
- Address: Hampton Road, Teddington, Middlesex, TW11 0LW
- Email: Through enquiry form
Review: ★★★★★
“There’s simply no one better if precision is critical. This is the top tier.”
9. RS Calibration Services – “One Supplier, Total Confidence”
RS Calibration is part of RS Group, a globally respected brand in electronics and industrial supplies. Their calibration services are designed for convenience and integration, especially for companies already sourcing equipment from RS. They support a wide range of tools and instruments and offer digital access to certificates and service records.
RS Calibration ensures traceability and compliance, making it a practical choice for maintenance teams across London. Their strength lies in offering calibration as part of a broader technical support system.
Operational Strength
Integrated calibration with procurement and maintenance solutions.
Ideal Fit
Great for teams managing tools through RS and needing easy scheduling.
Pricing: Available on request
- Website: https://uk.rs-online.com
- Phone: +44 345 720 1201
- Address: Birchington Road, Corby, United Kingdom
- Email: social.media@rs-components.com
Review: ★★★★☆
“Easy to book, solid documentation, and convenient for our workflow.”
10. Acutest Calibration Services – “Complete Test Equipment Solutions”
Acutest is a UK-based company offering comprehensive calibration, repair, and test equipment hire services with a dedicated facility serving clients in London. With over 30 years in the industry, Acutest provides both in-house and on-site calibration solutions for electrical, pressure, and environmental testing instruments.
They are known for their fast service, transparent pricing, and high-quality standards. Their engineers are trained to handle a wide range of instruments, and they support clients across utilities, facilities management, and construction sectors. Acutest is a one-stop solution for companies looking to combine equipment hire with reliable calibration support.
Field Expertise
Professional calibration services paired with equipment hire and repair.
Perfect For
Ideal for contractors and engineers needing test tools and quick calibration turnarounds.
Pricing: Pricing based on service type and urgency
- Website: https://www.acutest.net
- Phone: 01782 563030
- Address: High Carr Business Park Newcastle-under-Lyme Staffordshire ST5 7UG
- Email: sales@acutest-ukti.co.uk
Review: ★★★★☆
“Very helpful staff and quick turnaround. We use them regularly for calibration and hire needs.”
How Does Calibration Support Regulatory Compliance in the UK?
In many industries, especially those governed by health, safety, and environmental regulations, compliance is non-negotiable. Calibration plays a fundamental role in helping companies meet legal and quality standards. It ensures that equipment used in measurement and testing performs consistently within specified tolerances.
UK businesses are often required to follow standards such as ISO 9001 and ISO/IEC 17025. A UKAS-accredited calibration certificate serves as documented proof that equipment complies with these standards. Such certificates typically include information like test results, environmental conditions, and traceability to national or international measurement standards.
This documentation is vital during audits and inspections, and it can also be a requirement for product certification or tender submissions. Therefore, using a reputable calibration company isn’t just about ensuring equipment accuracy it also supports your wider compliance framework.
How Often Should Calibration Be Performed for Industrial Equipment?
The frequency of calibration depends on the type of equipment, how often it’s used, the environment it operates in, and industry requirements. While some instruments may only need annual calibration, others that are used heavily or operate in harsh conditions might require more frequent checks.
Here’s a general guide to recommended calibration intervals:
| Type of Equipment | Recommended Calibration Frequency |
| Multimeters | Every 12 months |
| Pressure Gauges | Every 6–12 months |
| Temperature Sensors | Every 12 months or per use cycle |
| Torque Wrenches | Every 6 months or 5,000 cycles |
| Lab Balances | Every 3–6 months |
This table offers a starting point, but businesses should consult with their calibration provider to determine the ideal schedule based on their specific use case.
What Factors Affect the Cost of Calibration Services?
The cost of calibration in London can vary significantly depending on a few key elements. Firstly, the type of equipment being calibrated has a major impact on pricing. Instruments that require high precision or more complex procedures often cost more to calibrate. For example, calibrating a high-frequency signal analyser will typically cost more than a standard digital thermometer.
Secondly, the delivery method of the service matters. On-site calibration tends to be more expensive due to the travel and time required, but it can reduce downtime significantly. Emergency or expedited services usually carry a premium as well. Volume discounts are often available for companies that submit multiple instruments for calibration at once.
Here’s a breakdown of typical costs:
| Service Type | Estimated Cost (GBP) |
| Electrical Calibration | £40–£100 per unit |
| Temperature Calibration | £30–£70 per device |
| Pressure Calibration | £50–£120 per gauge |
| On-Site Calibration Visit | £150–£500 per session |
| Emergency Calibration | Varies; premium pricing |
To manage costs effectively, many businesses choose to work with a provider that offers tailored service plans or calibration management programs.
Is It Better to Choose a Local Calibration Company in London?
Working with a local calibration provider offers several practical benefits. For one, response times are significantly reduced. Whether it’s collecting instruments, performing on-site calibrations, or handling emergencies, a local company can deliver services faster and with more flexibility.
Furthermore, local providers are often more attuned to the specific compliance requirements and business practices common in London and the wider UK market. Their familiarity with local industries, combined with proximity, makes communication easier and builds long-term trust between service provider and client.
In many cases, choosing a local calibration company also reduces transportation costs and minimises the risk of damage during shipping, especially for delicate or high-value instruments.
Conclusion
Selecting a calibration company is a strategic decision that affects the accuracy of your operations and your ability to stay compliant with UK regulations. The best providers combine technical expertise with excellent customer service, offering both flexibility and rigorous quality standards.
Whether you’re a large industrial manufacturer or a small laboratory, the London market offers numerous capable and certified calibration companies. Take the time to assess your requirements, verify accreditations, and consider long-term service relationships that can support your growth.
FAQs About Calibration Companies
What is the difference between calibration and verification?
Calibration involves adjusting and documenting an instrument’s accuracy, while verification simply checks if it’s within specification without making any adjustments.
Are all calibration labs in London UKAS accredited?
Not all are. UKAS accreditation is a mark of excellence, and it’s wise to verify a lab’s credentials before proceeding with their services.
Can calibration services be done on-site in London?
Yes, many London-based companies offer on-site calibration services, especially for industrial clients who prefer minimal disruption.
How long does it take to calibrate industrial equipment?
Turnaround times vary but typically range from 1 to 5 days. Emergency services can reduce this to 24 hours or less.
What is traceable calibration?
This refers to calibration that can be linked through documented records to recognised national or international standards.
Are emergency calibration services available?
Yes, some providers offer rapid response or same-day calibration, which is ideal for equipment failure situations.
Can small businesses in London afford professional calibration?
Absolutely. Many calibration providers offer cost-effective packages suitable for startups and SMEs.