When it comes to purchasing calibration test weights online, the weight section at 1800SCALES.com is an easy choice. They use only the finest weights from the best suppliers. Their suppliers have been supplying high-quality precision measurement products and services for over 25 years. The combination of world class manufacturing technology, an experienced staff of professionals, and a commitment to total quality enables us to assist industry in attaining a variety of quality certifications including ISO 9000 and ISO/IEC 17025. Precision calibration weights including ASTM and NBS classes for balances and scales are available. Weights, weight kits, and weight cases are available. Below are some questions to ask yourself before purchasing calibration test weight.
 
1. What is the maximum amount of weight you will need at any one time?
2. What is the minimum amount of weight you will need at any one time?
3. What tolerance are you looking for?
4. What “style” (ASTM, OIML, NIST) is required or preferred?
5. What configuration do you need (5-3-2-1 or 5-2-2-1)?
6. What is your budget for this project?
7. Tell us about the environment. Is it
  a. Indoor/outdoor?
  b. Wet/dry?
  c. Windy/still?
  d. Corrosive, hazardous, or explosive?
  e. A clean room?
   f. Are there biohazard, electrostatic, or magnetic conditions to consider?
  g. What else is noteworthy?
8. Are you replacing an existing weight or weight set?
9. Does this weight set need to be legal for trade?
10. Do you need ISO/IEC 17025 & ISO 9000 laboratory documentation?
11. If you do not need ISO/IEC 170285 and ISO 9000 laboratory documentation, do you need traceability to NIST?
12. If you do not need any documentation, you still have the option of a Certificate of Accuracy.

There is a great selection of calibration test weight kits, cast iron grip handle weights, slotted weights, stainless steel grip handle weights and stainless steel individual weights available for purchase online using any major credit card at 1800SCALES.com