Used Koehler Thermometers

Check the type (digital, glass, thermocouple), specified accuracy and range, calibration history and certificates, probe condition, any signs of damage or contamination, and compatibility with the chemicals or sterilization methods you use.

Pack probes and fragile glass in padded, rigid containers and secure moving parts. Declare any hazardous components (e.g., mercury), use a carrier experienced with lab equipment, insure the shipment, and include handling instructions to prevent shock or extreme temperature exposure.

Follow manufacturer guidance and your lab quality plan: calibrate before critical measurements, periodically (commonly annually or semi-annually depending on use), after any drop or damage, and replace batteries or sensors as needed. Keep calibration records and store devices properly.