• Catalogue Numbers: GR-1001, GR-1003, GR-1005 with corresponding packages GR-1001-P, GR-1003-P, GR-1005-P.
• Water Quality: Grade 1 water resistivity at 25°C is 18.2 MΩ x cm and conductivity is 0.055 µS/cm. Grade 2 water conductivity is ≤0.1 µS/cm.
• Contaminant Levels: TOC is <10 ppb for GR-1001 and <3 ppb for GR-1003 and GR-1005. Rnase and Dnase levels are specified only for GR-1005, with <1 pg/mL and <5 pg/mL respectively. Bacteria levels are <0.01 CFU/mL, and endotoxins are <0.15 EU/mL for GR-1001 and GR-1003, and <0.001 EU/mL for GR-1005.
• Particle Filtration: Particles >0.22 μm are <1 per mL for GR-1001 and GR-1003, and <0.05 per mL for GR-1005.
• Flow and Dispense: Nominal flow rate is 10 L/h. Volumetric dispense is adjustable with a 7" touchscreen display.
• Environmental Conditions: Operating temperature range is 15–30°C with relative humidity between 20–80%.
• Electrical Requirements: Mains voltage is 200–240 VAC with power consumption of 130 W and a fuse of 230 V, 3.15 A.
• Dimensions and Weight: Dimensions are 50(33)*45*63 cm. System weight ranges from 28 kg to 30 kg, and operating weight from 32 kg to 34 kg.

• Type: Potable tap water.
• Pressure: 0.4–6.0 bar.
• Conductivity: <2000 μS/cm.
• Temperature: 5–35°C.
• pH Range: 4–10.
• Fouling Index: <10.
• Contaminants: Iron <0.1 ppm, Aluminium <0.05 ppm, Manganese <0.05 ppm, Total chlorine <1 ppm.
• Langelier Saturation Index: <+0.2.
• TOC: <2000 ppb.
• Hardness: <160 ppm as CaCO3.

The Gradus system integrates ultrapure (Grade 1) and pure (Grade 2) water systems, offering a range from 0.01 to 100 L with dispensing capabilities from 2 L/min to drop-by-drop. A TOC monitor is included in GR-1003 and GR-1005 models.