The market for pre-owned laboratory instruments has grown substantially in recent years, driven by tighter R&D budgets, the growing availability of certified refurbished equipment, and the simple fact that many high-quality analysers last for decades with proper maintenance. But not all second-hand equipment is equal — and knowing what to look for can be the difference between a smart investment and an expensive headache.

1. Verify the Calibration Status

Before anything else, ask for the instrument’s calibration records. A well-maintained lab instrument should have documented calibration intervals. For grain analysers such as NIR units or Falling Number machines, recent calibration against certified reference materials is essential. If records are unavailable, budget for recalibration costs before committing.

2. Inspect Physical Condition and Wear Points

Look carefully at the specific wear points for each instrument type. On a Falling Number unit, check the viscometer tube and plunger for scratches or corrosion. On an alveograph, examine the kneading bowl and the inflation system. On moisture meters, inspect the sample chamber for contamination or residue build-up. Surface cosmetic issues rarely affect performance; mechanical wear does.

3. Request a Test Run with a Reference Sample

Any reputable seller should allow you to run a certified reference sample on the instrument before purchase. Compare the result against the known value. For Falling Number analysers, a discrepancy of more than ±10 seconds from the reference should prompt further investigation.

4. Check for Spare Parts Availability

Older models of some brands have discontinued spare parts. Before buying, confirm that consumables and replacement parts — such as viscometer tubes, thermal cups, or sensor modules — are still available. Fuhler Labor maintains a network of parts suppliers for brands including Perten, Bastak, Chopin, and Carbolite.

5. Ask About the Equipment’s History

Find out how intensively the instrument was used. A unit from a research laboratory running 20 samples per week is very different from one from a production mill running 200 samples per day. Usage intensity directly correlates with mechanical wear.

At Fuhler Labor, every instrument listed on our platform is physically inspected and tested before listing. We believe transparency is the foundation of trust in the pre-owned equipment market.