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Buy 2 packs of sorbent tubes – get a third pack free

We are offering ‘buy two packs – get a third free’ on our sorbent tubes listed below.

When buying sorbent tubes from Markes, you can rest assured that you’re buying the best available:

  • Every tube undergoes stringent quality checks.

  • Tubes are manufactured to ISO 9001-accredited procedures.

  • Application-specific tubes are packed with an optimised sorbent combination.

All tubes are etched with a unique ID number and barcode so they are easy to use and track. Tubes available include our broad range of glass, stainless-steel and inert-coated tubes.

This is a time-limited offer, from 4 September to 15 October 2023, inclusive.

Please use promotion code ‘TUBESDEAL23’ when placing your order via phone, fax or email.  Email us at to arrange your quote. For online ordering the promotion discount will be automatically applied when you add 3 packs of the same tube to your basket.


Offer details

Valid for the following glass, stainless steel and inert-coated tubes; including unconditioned, conditioned, and SafeLok:

  • Tenax TA
  • Universal
  • Universal 1000 
  • Air toxics
  • Air toxics 1000
  • Bio-monitoring
  • Carbograph 5TD
  • Graphitised carbon
  • Graphitised carbon universal
  • Hydrophobic
  • Material emissions/Soil gas
  • PAH
  • SVOC
  • PFAS

Terms & Conditions:

  1. Buy two packs of tubes and receive a third pack for free.

  2. Offer is valid between 04 September and 15 October 2023 only.

  3. Offer applies to the tubes listed above only.

  4. Tubes are sold in packs of 10.

  5. Tubes must be all of the same type with no mixing or substitutions (same product number).

  6. Offer can only be applied to new orders.

  7. Use of the promotion code is required to receive the offer.

  8. The promotion code may be used multiple times (over multiple orders or within a single order) until the offer end date.

  9. Markes reserves the right to withdraw this offer without notice at any time.

  10. There is no cash alternative.

  11. The offer is applicable to orders placed directly with Markes International Ltd, Markes International Inc., Markes International GmbH, Schauenburg Analytics Solutions (Shanghai) or Markes Instruments Shanghai via phone, fax or email (excludes online ordering).For online orders, an equivalent offer will apply, giving 33% discount when 3 packs of the same tube type are added to the basket.

  12. The offer cannot be used in conjunction with any other offer.