Product Description
When a balance must read true to the hundredth of a milligram, the reference behind it has to be better still. These ASTM reference calibration weight sets from OHAUS are made to UltraClass tolerances, tighter than ASTM Class 1, so they can serve as primary standards for calibrating high-precision balances and lower-class weights. Ranges run from milligram sets for microbalance work to 50 kg sets for heavy-capacity reference work.
This listing is for OHAUS item number 30390093: UltraClass ASTM Reference Weight Set, 25 kg to 1 g, No Certificate. Weights 1 g through 1 kg are machined from Alloy 8 stainless steel, larger kilogram pieces are 316 stainless steel, and fractional milligram weights are 304 stainless steel or aluminum. Weights 1 g and above are two-piece cylindrical pieces with a handling knob, while 500 mg and below are one-piece flat weights with a turned-up end for forceps handling. Every set ships in a fitted protective case and is made in the USA, with no-certificate, non-accredited and ISO/IEC 17025 accredited options. LIGHT LABS supplies the OHAUS line with knowledgeable support from our Englewood, Colorado team.
Key Features
- UltraClass Tolerances – Reference-grade sets built to tighter-than-ASTM Class 1 tolerances for calibrating high-precision balances with readability down to 0.01 mg
- Alloy 8 Stainless Steel – Weights from 1 g upward are machined from non-magnetic Alloy 8 stainless steel with a density of about 8.03 g/cm³ for low air-buoyancy error
- Adjustable Two-Piece Design – Weights 1 g and above use a two-piece construction with a handling knob so the mass can be adjusted during recalibration
- Easy-Handling Fractional Weights – Milligram weights are one-piece flat pieces with one end turned up for pickup with forceps
- Fitted Protective Case – Each set ships in a fitted case that keeps every piece in its own cavity to prevent contact damage and contamination
- Certificate Options – Available with no certificate, a non-accredited traceable certificate, or an ISO/IEC 17025 accredited calibration certificate
Specifications
| Item Number | 30390093 |
| Brand | OHAUS |
| Description | UltraClass ASTM Reference Weight Set, 25 kg to 1 g, No Certificate |
| Calibration Certificate | No Certificate |
| ASTM Class | UltraClass |
| Weight Set Range | 25 kg - 1 g |
| Set Capacity | 85 kg |
| Set Total Pieces | 19 |
| Protective Case | Included |
| Construction | 1 g and above are two-piece; 500 mg and below are one-piece |
| Density at 20°C | Below 2 kg are 8.03 g/cm3;2 kg and above are 7.95 g/cm3 |
| Dimensions in Case | 11.7 in x 19.7 in x 24.6 in (29.718 cm x 50.038 cm x 62.484 cm) (LxHxW) |
| Set Contents | (2) 2 g;(2) 200 g;20 kg;10 g;(2) 20 g;100 g;10 kg;1 g;50 g;(2) 2 kg;5 g;1 kg;500 g;5 kg |
| Weight Material | ≥2 kg are 316 Stainless Steel;Below 2 kg are Alloy |
| Wgt Origin (USA) | USA |
Related Models
- 30390066 – UltraClass ASTM Reference Weight Set, 20 g to 100 mg, No Certificate
- 30390079 – UltraClass ASTM Reference Weight Set, 200 g to 1 g, No Certificate
- 30390009 – UltraClass ASTM Reference Weight Set, 2 x 200 g to 1 g, No Certificate
- 30390071 – UltraClass ASTM Reference Weight Set, 50 g to 100 mg, No Certificate
- 30390081 – UltraClass ASTM Reference Weight Set, 500 g to 1 g, No Certificate
- 30390061 – UltraClass ASTM Reference Weight Set, 500 mg to 1 mg, No Certificate
- 30390083 – UltraClass ASTM Reference Weight Set, 1 kg to 1 g, No Certificate
- 30390120 – UltraClass ASTM Reference Weight Set, 1 kg to 1 g, with Non-Accredited Calibration Certificate
- 30390076 – UltraClass ASTM Reference Weight Set, 100 g to 100 mg, No Certificate
- 30390085 – UltraClass ASTM Reference Weight Set, 2 kg to 1 g, No Certificate
- 30390122 – UltraClass ASTM Reference Weight Set, 2 kg to 1 g, with Non-Accredited Calibration Certificate
- 30390065 – UltraClass ASTM Reference Weight Set, 20 g to 10 mg, No Certificate
- 30390064 – UltraClass ASTM Reference Weight Set, 20 g to 5 mg, No Certificate
- 30390011 – UltraClass ASTM Reference Weight Set, 2 x 2 kg to 1 g, No Certificate
Applications
- Calibrating analytical and semi-micro balances
- Primary reference for calibrating working mass standards
- Maintaining traceability between national standards and ASTM Class 1 weights
- Metrology and calibration laboratories
- ISO 9001, GLP and GMP balance verification
- Pharmaceutical and research QA/QC programs
