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Service and Calibration

World-Class Calibration, Every Step of the Way

LWS Global Service & Calibration provides ISO 17025-accredited calibration and expert support, ensuring every measurement device and monitoring system operates at peak accuracy and compliance for regulated environments. Our fast, precise workflows—backed by world-class technical support and transparent Service Level Agreements—mean customers receive efficient, reliable results and proactive maintenance, minimizing downtime and risk.

Our dedicated professionals offer calibration and repair for a wide range of instruments both in-lab and on-site, complemented by global customer notification programs and consulting that keep clients ahead of regulatory changes and market needs.

With Lighthouse, partnership and excellence come standard: so your standards are always met.

Frequently Asked Questions

What is size calibration (Non-ISO), and what does it include?

Size Calibration (non-ISO) is a basic form of calibration for air particle counters. It includes testing and stating the following parameters as per the received data:

  1. Size Setting: The calibration of the device to accurately measure the size of particles.
  2. Sample Flow Rate: The rate at which air is sampled by the device.
  3. False Count: The measure of the device’s accuracy in differentiating between actual particles and false readings.
What is included in the ISO 21501-4 calibration?

The ISO 21501-4 Calibration is a more comprehensive calibration standard for air particle counters. It includes all elements of the Size Calibration (non-ISO), plus two additional parameters:

  1. Size Resolution: The ability of the device to distinguish between particles of different sizes.
  2. Counting Efficiency: The effectiveness of the device in counting particles within a specified size range.
How does ISO 17025 calibration different from the other types?

ISO 17025 Calibration represents the highest standard of calibration, combining the requirements of ISO/IEC 17025 and ISO 21501-4:2017. It includes the following five parameters:

  1. Size Setting
  2. Sample Flow Rate
  3. False Count
  4. Size Resolution
  5. Counting Efficiency

All these parameters are rigorously tested and stated in the calibration report, providing the most comprehensive evaluation of the air particle counter’s performance.

Why choose one type over another?

The choice of calibration depends on the required accuracy, industry standards, and regulatory compliance needs. Non-ISO Size Calibration is suitable for basic applications, ISO 21501-4 Calibration is preferred for more precision and compliance with certain industry standards, while ISO 17025 Calibration is essential for the highest level of accuracy and for meeting stringent regulatory requirements.

Is the 'as received' data included in all calibrations?

Yes, ‘as received’ data, which represent the initial state of the device before any calibration adjustments, are included in all three types of calibrations. This data is crucial for understanding the initial performance of the device and for comparing pre-calibration and post-calibration performance.