The Advanced® Model 3900 Multi-Sample Osmometer is designed to automate testing for laboratories processing moderate to high volumes of samples. Approximately 30 samples per hour at 73°F or 23°C; less at higher ambient temperature and in high range. Holds up to three continuously loadable 10-sample cassettes plus insertable single sample stat test. By using the industry-preferred method of freezing-point technology for an accurate determination of total concentration, combined with high, continuous throughput, the Advanced Instruments Model 3900 will provide your laboratory optimal efficiency, easily, accurately, and reliably. Drift is less than 1 unit per month plus 1 unit for every 9°F or 5°C ambient temperature change. One-year limited warranty on workmanship and all parts except glass, plastic and parts warranted by their makers. Specifications: Sample Size: 0.2 to 0.3-mL, Units: mOsm/kg H2O, Low: 0 to 1550 mOsm/kg H2O, High: 1450 to 4000 mOsm/kg H2O, Linearity: ±0.5% (0-1500), Repeatability: 0 to 400: ±2 mOsm/kg H2O (1 S.D.), Resolution: ±1 mOsm/kg H2O, Communications: DTE EIA-232/V.24 (RS-232), Storage Temperature: -40°F to +113°F (-40°C to +70°C), Low Range: 64°F to 95°F (18°C to 35°C), High Range: 64°F to 86°F (18°C to 30°C), Room Humidity: 5-80% (non-condensing), Start-up Time: 3 to 10 minutes., Dimensions Inches (cm) WxDxH: 21.5 x 20.0 x 21.5 (55 x 51 x 55), Voltage: 100 to 130 VAC or 200 to 250 VAC, Frequency: 50 or 60 VAC, Fuses (2): 5-Amp time delay for 100-130 VAC, Power: 350 watts, Memory Backup: Integral lithium cell; 10 years typical life, Net: 65 (29.5), Shipping: 103 (46.7).