Used Cahn 29 Ultra-Microbalance

Cahn 29 Micro Balance
Very similar to the Cahn C-31 (this model preceeded the C-31)
Sample Position A B Capacity 1.5 grams 3.5 grams
Weight (range/ sensitivity)25 mg/ 0.1ug: 250 mg/ 1ug: 1250 mg/ 10ug
Tare (mechanical): 1.5 grams 3.5 grams
Tare (electrical): 250 mg 1250 mg
Accuracy (% wt range) 0.0012% 0.008%
Precision (ultimate) 0.1 ug 10 ug
Precision (fraction of load) 0.0001% 0.001%

With manual, 200mg calibration weight, SS forceps, two platform stirrups, aluminum weigh pans (6). Serviced and calibrated.