Product Description
Calibrating a microbalance or semi-micro balance demands a reference you never have to second-guess, and OHAUS UltraClass individual weights deliver exactly that. Each weight is adjusted to tolerances tighter than routine field standards, so it can anchor the traceability chain between national standards and ASTM Class 1 working weights.
This listing is for OHAUS item number 30390208: UltraClass ASTM Reference Weight, 10 mg, One-Piece Flat, with Non-Accredited Calibration Certificate. Weights from 1 g upward use a two-piece cylindrical design, while 500 mg and smaller values are flat one-piece wafers with a turned-up edge for tweezer handling. Depending on value, weights are machined from Alloy 8 stainless steel, 303, 304 or 316 stainless steel, or aluminum for the smallest denominations, and most ship in a protective case. Choose no certificate, a traceable non-accredited certificate, or an ISO/IEC 17025 accredited certificate with stated uncertainty. Order it from LIGHT LABS alongside the rest of your OHAUS balances, weights and lab equipment.
Key Features
- Primary-Reference Accuracy – UltraClass tolerances suit calibrating ASTM Class 1 and lower weights and balances that read to 0.01 mg
- Value-Matched Design – Two-piece cylinders from 1 g up, flat one-piece wafers at 500 mg and below for tweezer handling
- Certificate Choice – Order with no certificate, a traceable certificate, or an ISO/IEC 17025 accredited certificate with uncertainty
- Corrosion-Resistant Materials – Alloy 8, 303, 304 or 316 stainless steel, with aluminum for some milligram values
- Grip-Handle Options – EB grip-handle versions of heavy kilogram values allow safer lifting and placement
- Protective Storage – Most values ship in a protective case to limit handling damage and contamination
Specifications
| Item Number | 30390208 |
| Brand | OHAUS |
| Description | UltraClass ASTM Reference Weight, 10 mg, One-Piece Flat, with Non-Accredited Calibration Certificate |
| Calibration Certificate | Traceable Certificate |
| ASTM Class | UltraClass |
| Weight Value | 10 mg |
| Design | Flat |
| Protective Case | Included |
| Construction | One-piece |
| Density at 20°C | 7.95 g/cm3 |
| Dimensions | 0.15 in x 0.08 in x 0.18 in (0.39 cm x 0.203 cm x 0.47 cm) (LxHxW) |
| Dimensions in Case | 2.5 in x 2 in (6.35 cm x 5.08 cm) (HxØ) |
| Weight Material | 304 Stainless Steel |
| Weight Tolerance | 0.005 mg |
| Wgt Origin (USA) | USA |
| Weight Grade | UltraClass |
| Certificate Options | None, Traceable, ISO/IEC 17025 Accredited |
| Country of Origin | USA |
Related Models
- 30390184 – UltraClass ASTM Reference Weight, 1 g, Two-Piece Cylindrical, No Certificate
- 30390216 – UltraClass ASTM Reference Weight, 1 g, Two-Piece Cylindrical, with Non-Accredited Calibration Certificate
- 30390196 – UltraClass ASTM Reference Weight, 1 kg, Two-Piece Cylindrical, No Certificate
- 30390261 – UltraClass ASTM Reference Weight, 1 kg, Two-Piece Cylindrical, with Accredited Calibration Certificate
- 30390228 – UltraClass ASTM Reference Weight, 1 kg, Two-Piece Cylindrical, with Non-Accredited Calibration Certificate
- 30390172 – UltraClass ASTM Reference Weight, 1 mg, One-Piece Flat, No Certificate
- 30390237 – UltraClass ASTM Reference Weight, 1 mg, One-Piece Flat, with Accredited Calibration Certificate
- 30390270 – UltraClass ASTM Reference Weight, 1 mg, One-Piece Flat, with Non-Accredited Calibration Certificate
- 30390188 – UltraClass ASTM Reference Weight, 10 g, Two-Piece Cylindrical, No Certificate
- 30390271 – UltraClass EB Cylindrical Reference Weight, 10 g, Two-Piece, No Certificate
- 30390333 – UltraClass EB Cylindrical Reference Weight, 10 g, Two-Piece, with Accredited Calibration Certificate
- 30390253 – UltraClass ASTM Reference Weight, 10 g, Two-Piece Cylindrical, with Accredited Calibration Certificate
- 30390302 – UltraClass EB Cylindrical Reference Weight, 10 g, Two-Piece, with Non-Accredited Calibration Certificate
- 30390220 – UltraClass ASTM Reference Weight, 10 g, Two-Piece Cylindrical, with Non-Accredited Calibration Certificate
Applications
- Calibration of analytical and semi-micro balances
- Primary reference for ASTM Class 1 working weights
- Metrology and calibration laboratories
- ISO/IEC 17025 and GLP quality programs
- Routine balance performance checks
- Mass comparison and traceability chains
