When you're shopping for lab balances scales, the main challenge is matching precision to your workload and your tolerance for a project. This head-to-head compares two used Mettler analytical balances from opposite ends of the price spectrum: the Mettler AE 100 Analytical Balance Laboratory Scale with Draft Shield at USD 150.00 and the Mettler Toledo MS105 NewClassic MF Semi-Micro Analytical Balance Scale 120g at USD 789.00. The AE 100 is a functional used unit with cosmetic wear, while the MS105 is a semi-micro balance sold as-is because the draft shield housing is damaged.
Quick Verdict
If you need a working analytical balance without a repair project, the Mettler AE 100 is the lower-priced pick. It is a used physical laboratory balance with a draft shield, functional despite scuffs and blemishes, and it will need calibration before you trust its readings. If you need semi-micro readability and can handle a damaged draft shield housing, the Mettler Toledo MS105 is the more advanced balance, but it costs considerably more and is sold as-is for parts or repair.
Comparison at a Glance
| Product | Listed Price | Price Bar | Condition Detail | Best Match |
|---|---|---|---|---|
| Mettler AE 100 | USD 150.00 | Used, functional, scuffs and blemishes, needs calibration | Budget-conscious general analytical weighing | |
| Mettler Toledo MS105 | USD 789.00 | Used, sold as-is, electronics and internal mechanics function, draft shield housing damaged | Semi-micro precision work when repair is acceptable |
Where the AE 100 Stands Out
The AE 100's appeal is in its lower listed price and functional used state. It includes a draft shield, fits a physical laboratory setting, and the main caveat is calibration. For most general analytical weighing, this is the balance that is easier to put into service without extra repair work.
Where the MS105 Stands Out
The MS105 brings semi-micro analytical positioning to the table, with 120g capacity and 0.01mg readability. The catch is that the draft shield housing is damaged, and the unit is sold as-is. If you can repair or replace that housing, the balance has the finer resolution the AE 100 doesn't claim.
Mettler AE 100 Analytical Balance Laboratory Scale with Draft Shield
For a lab that mostly performs everyday analytical weighing, this balance keeps the initial investment low. It shows scuffs and blemishes from use, but the unit is functional and comes with a draft shield. It would need calibration and doesn't include calibration weights, so plan for that step before you rely on readings. This is the balance to choose when you want a usable lab scale without taking on a repair project. Its limitation is that it doesn't offer semi-micro resolution, and its physical condition is far from pristine.
Mettler Toledo MS105 NewClassic MF Semi-Micro Analytical Balance Scale 120g
This is a higher-priced, higher-classification balance, but it comes with a catch. The electronics and internal mechanics function, yet the draft shield housing has physical damage and the unit is sold as-is for parts or repair. That means you're buying a semi-micro analytical balance with the understanding that you may need to repair the housing before it is lab-ready. For someone who needs 0.01mg readability and is comfortable handling the repair, the MS105 gives you a path to finer measurements. The main limitation is the unknown cost and effort required to restore the draft shield housing.
Final Choice by Use Case
Choose the Mettler AE 100 if you need a used analytical balance for everyday lab weighing and want to keep the initial expense low. It is functional, includes a draft shield, and only needs calibration before use.
Choose the Mettler Toledo MS105 if your work genuinely requires semi-micro analytical readability and you are comfortable buying a unit sold as-is for repair. The damaged draft shield housing is the main obstacle, but the underlying balance is described as mechanically functional at a higher precision class.
