Blog

Choosing the right product testing laboratory is an important step for manufacturers, importers, exporters and businesses that want to maintain product quality, evaluate performance and meet applicable requirements. Whether you manufacture food products, building materials, electrical equipment, chemicals or consumer goods, the right testing partner can help you obtain meaningful results and make informed quality decisions.

However, not every laboratory performs every type of test, and accreditation alone does not automatically establish that a laboratory is suitable for every testing requirement. Businesses should evaluate the laboratory’s relevant capabilities, applicable testing standards, accreditation scope and reporting practices before placing a testing request.

In this guide, we explain how to choose a product testing laboratory in India and what to consider before submitting your samples.

What Is a Product Testing Laboratory?

A product testing laboratory evaluates a product, material or sample using specified testing methods to determine particular characteristics or performance parameters.

Depending on the product and testing objective, laboratory testing may involve chemical analysis, microbiological examination, mechanical evaluation, electrical testing, physical property measurement or environmental assessment.

For example:

• Food businesses may require nutritional analysis, contaminant testing or pesticide residue analysis.
• Construction companies may need cement, concrete, steel or other building material testing.
• Automotive manufacturers may require material, corrosion, vibration or performance testing.
• Consumer product manufacturers may need product-specific safety or performance evaluations.
• Industrial facilities may require calibration of instruments used for measurement and quality control.

The appropriate tests depend on the product, intended application, applicable requirements and the question the business needs the results to answer.

Businesses can explore Sigma Test & Research Centre’s testing services to identify relevant testing categories.

1. Check the Laboratory’s NABL Accreditation and Scope

One of the first steps when selecting a testing laboratory is to examine its accreditation status and the scope covered by that accreditation.

The National Accreditation Board for Testing and Calibration Laboratories (NABL) accredits laboratories against applicable competence requirements, including ISO/IEC 17025 for testing and calibration laboratories.

However, it is important to understand that accreditation is scope-specific. A laboratory may be accredited for certain tests, products, methods or parameters without that accreditation covering every service it offers.

Before proceeding, verify:

• Whether the laboratory holds the relevant accreditation.
• Whether the required test or parameter is included in its current scope.
• Whether the scope covers the product or material you need tested.
• Whether the applicable testing method and measurement range are appropriate for your requirement.
• Whether the customer or regulatory authority requires a particular accreditation or approval.

You can consult the official NABL website for accreditation information and scope verification.

At Sigma Test & Research Centre, customers can also review the laboratory’s published accreditation and approval information before discussing a specific testing requirement.

Important: Do not assume that every test offered by an accredited laboratory is automatically covered by its accreditation. Confirm the exact requirement before submitting samples.

2. Select a Laboratory That Handles Your Product Category

Different products require different testing capabilities. A laboratory experienced in one category may not necessarily have the appropriate methods or facilities for another.

Start by identifying the category of your product and the properties you need to evaluate.

Examples include:

Food and agricultural products

Food businesses may need nutritional analysis, food safety testing, contaminant analysis or pesticide residue testing, depending on the product and objective.

Explore food testing services and food and agricultural testing.

Building and construction materials

Construction projects may require testing of cement, concrete, bricks, steel, aggregates or other materials to evaluate specified physical or mechanical properties.

Explore building material testing services.

Automotive components and industrial materials

Manufacturers may need corrosion testing, mechanical testing, vibration testing, material evaluation or other product-specific assessments.

Review the automotive and industrial testing categories to identify the appropriate service.

Water and environmental samples

Depending on the application, water testing may involve specified chemical, physical or microbiological parameters.

Businesses can review the available water testing services.

Choosing a laboratory with relevant capabilities helps ensure that the proposed test addresses the actual requirement rather than providing results that are not useful for the intended decision.

3. Confirm the Applicable Testing Standard or Method

Before sending a product for testing, identify the standard, specification or method against which it needs to be evaluated.

Depending on the product and purpose, the relevant requirement may refer to an applicable Indian Standard, an international standard, a customer specification or another recognised test method.

Do not choose a test solely because its name appears similar to the requirement in your purchase order, product specification or compliance document.

Instead, clarify:

• The exact product or material being tested.
• The parameter or property to be evaluated.
• The required standard and its applicable edition, where specified.
• The acceptance criteria, if the testing objective requires them.
• Any special sample preparation or conditioning requirements.

If you are unsure which method applies, discuss the intended use of the product and the requirement with the laboratory before confirming the test request.

This step is particularly important when test results will be used for supplier approval, product development, quality control or a regulatory submission.

4. Understand What the Test Report Will Contain

A test report is the documented output of the laboratory’s work. Before commissioning a test, understand what information the report will provide and whether that information is suitable for your intended use.

Depending on the test and reporting requirements, relevant information may include:

• Sample identification and description.
• The test method or applicable standard.
• The parameters examined.
• The reported results and units.
• Relevant conditions, limitations or observations.
• Any applicable statement of conformity, where agreed and supported by the relevant decision rules.

A test result and a compliance decision are not necessarily the same thing. A report containing measured values does not automatically establish that a product meets every applicable regulatory or customer requirement.

If you need to demonstrate conformity, communicate the applicable specification and acceptance criteria before testing begins. Also confirm whether the recipient requires an accredited report, a specific reporting format or other supporting documentation.

Clear expectations help businesses use laboratory results more effectively.

5. Ask About Sample Requirements and Turnaround Time

Sample requirements can differ considerably between products and testing methods. Incorrect packaging, insufficient quantity, unsuitable containers or poor sample identification may affect whether a sample can be accepted or tested appropriately.

Before dispatching your sample, ask the laboratory about:

1. The required sample quantity and condition.
2. Suitable packaging and transportation arrangements.
3. Labelling and sample identification.
4. Storage or temperature requirements, if applicable.
5. Any supporting documents or specifications needed.
6. The estimated turnaround time for the requested tests.

Turnaround time should be confirmed for the specific testing request rather than assumed from a general service description. The time required can depend on the test method, number of parameters, sample condition and laboratory workload.

Planning these details in advance can help reduce avoidable delays in your quality assurance process.

6. Evaluate the Laboratory’s Technical Capabilities and Communication

A professional testing relationship requires more than sample collection and the delivery of a report. Clear communication is also important when defining the scope of work, clarifying test requirements and interpreting the results.

When evaluating a laboratory, consider whether it can explain:

• Which tests are suitable for your product.
• Which methods and standards can be applied.
• Whether the requested test is within its accredited scope, if accreditation is required.
• What documentation must accompany the sample.
• What the final report will cover.
• Which limitations or additional evaluations may be relevant.

Also check the laboratory’s published service information, contact details and enquiry process. A clear process helps both parties establish the scope of work before testing starts.

7. Compare the Full Testing Requirement, Not Just the Price

Testing quotations should be compared on a like-for-like basis. Two quotations may appear similar while covering different parameters, methods, sample quantities or reporting requirements.

Before making a decision, compare:

• The number and type of tests included.
• The specified standards and methods.
• Accreditation coverage where required.
• Sample preparation and handling requirements.
• Reporting scope and format.
• Estimated completion time.
• Any additional charges or conditions stated in the quotation.

The lowest quotation is not necessarily the most suitable option if it excludes a required parameter or does not meet the intended reporting requirements.

A well-defined testing request allows businesses to compare quotations more accurately and make decisions based on technical suitability as well as cost.

Why Consider Sigma Test & Research Centre for Product Testing?

Sigma Test & Research Centre provides testing services across a range of product and material categories. Its published service portfolio includes food and agricultural testing, building material testing, automotive testing, chemical testing, water testing and other specialised testing services.

The organisation also lists calibration services for instruments and equipment, including analytical instruments, thermocouples, thermal parameters, mechanical parameters, electrical parameters and fluid flow.

Businesses can use the following pages to explore relevant services:

• Explore all testing services
• Food testing laboratory services
• Food and agricultural testing
• Calibration services
• Frequently asked questions
• Contact Sigma Test & Research Centre

Sigma states on its website that it has experience across multiple testing disciplines and provides testing and calibration services. For a specific requirement, customers should confirm the applicable method, current accreditation scope, sample requirements, pricing and expected turnaround time directly with the organisation.

The objective is to identify the right service for your product and testing purpose, with clear expectations established before the work begins.

Checklist Before Sending Your Product for Testing

Use this checklist to prepare your testing request:

• Identify the product, material or sample.

• Define the purpose of the test.

• Identify the required parameters and applicable standard.

• Verify the laboratory’s relevant accreditation scope, where required.

• Confirm sample quantity, packaging and handling instructions.

• Share any relevant specifications or documentation.

• Confirm the quotation and estimated turnaround time.

• Check whether the report will satisfy the recipient’s requirements.

Completing these steps can make the testing process more organised and help avoid misunderstandings about the scope of work.

Frequently Asked Questions

How do I choose the best product testing laboratory in India?

Start by identifying the tests your product requires. Then check the laboratory’s relevant technical capabilities, accreditation scope, applicable methods, reporting requirements, sample instructions and quotation. The most suitable laboratory is the one that can address your specific requirement.

Is NABL accreditation important when selecting a testing laboratory?

NABL accreditation can provide formal recognition of a laboratory’s technical competence within its accredited scope. Whether accreditation is necessary for your particular test depends on the applicable regulation, customer specification or intended use of the report.

Does NABL accreditation cover every test performed by a laboratory?

No. Accreditation applies to the activities included in the laboratory’s approved scope. Always verify the relevant test, parameter and method rather than relying only on the laboratory’s general accreditation status.

What information should I provide when requesting product testing?

Provide the product name, sample description, intended purpose, required parameters, applicable standard and any relevant customer or regulatory specification. Also explain whether the report must meet particular documentation or accreditation requirements.

Can a laboratory help identify the tests required for a product?

You can discuss your product and testing objective with the laboratory to clarify the available methods and relevant service options. The final test selection should be based on the applicable requirements and the laboratory’s confirmed capabilities.

Conclusion

Selecting a product testing laboratory is an important part of a business’s quality assurance process. By checking accreditation scope, choosing the appropriate test method, confirming sample requirements and understanding the final report, businesses can make more informed decisions about product quality and compliance.

Sigma Test & Research Centre offers a range of testing and calibration services that businesses can explore when identifying a suitable testing partner. Before proceeding, share your product details and requirements so the relevant service, scope and reporting expectations can be confirmed.

Looking for a suitable testing service for your product? Visit Sigma Test & Research Centre to explore the available services or contact the team to discuss your requirement.