CLS a group of Contract Laboratories is the leading provider of sampling and analysis to the food, environmental, pharmaceutical and medical device industries. Founded in 1994, CLS has developed a reputation for delivering high-quality laboratory data with a customer focused service in a timely manner.

We are the only Irish providers of:

  • Solvent residue testing
  • Heavy metal testing as per Usp 232 / 233 (ICP-MS)
  • Biocompatibility testing

Clients & Quality: The CLS group of laboratories has the accreditations and approvals required to allow us to work in partnership with our clients.

Staff: We view our staff as our most valuable asset. We have a complimenting mix of highly qualified laboratory analysts, supported by CLS staff recruited from the environmental, food, medical device and pharmaceutical industries.

Sample collection: We have focused on being the best in the market in the areas of collection, the turnaround of results and responsiveness. To ensure this position, we have a fleet of refrigerated vehicles nationwide and CLS staff based in Galway, Dublin and Cork.

Reporting: At CLS we have developed a bespoke in-house Laboratory Information Management System (LIMS) and an Enterprise Resource Planning System (ERP). Results of tests are available online. Clients can securely download their results and trend their data and or apply limits for compliance. The system complies with GAMP guidelines and FDA 21 CFR part 11.

CLS analysts on client sites: We can provide clients with an option to outsource their testing requirements to CLS state of the art laboratories & technology or CLS‘s analysts can work from client sites on contract and conduct the sampling and testing there.


Our centres of excellence include the following:

Environmental Sampling & Testing Food/Beverage Pharmaceutical / Medical Devices
Water: wastewater, potable water, process water, groundwater & surface water Meats and fish Catheters, stents, drugs, orthopaedics, combined devices, medical scaffolds, capillaries & delivery systems, polymers and plastics
Soil and sludge Salads Microbiological testing
Analytical testing Ready-to-eat dishes Analytical testing
Microbiological testing Beverages Contract R&D
Sampling (land & water) Plant hygiene, air & water Supply analysts on contract
Supply analysts on contract Microbiology Biocompatibility testing, leachable & extractable, raw materials and finished goods testing
Validation and commissioning Food chemistry Environmental monitoring
Noise / vibration Tank & pipe network sterilisation Method development, validation & optimisation
Flow & load Cleanroom validation / environmental monitoring Cleaning validation, QP of water loops, compressed air testing