IWT Test Weights

Features:

• NVLAP-accredited metrology laboratory
• Corrosion-resistant stainless steel
• Single-piece construction
• Meet or exceed all ASTM and OIML standards
• 1 gram to 5 kilogram weights
• Custom weight sets available

Balance Calibration Weights.
Electronic balances must be calibrated with a mass standard upon installation and on a regular basis thereafter. Calibration values vary over time because of changing conditions within the balance or its environment, such as:

• Differing gravitational forces
• Temperature variations
• Aging electronic components
• Movement or relocation of the balance

Single-piece construction.
All weights are ASTM Type 1 single-piece weights. They contain no air cavity or foreign adjusting material, thus providing the maximum mass stability. A precise measurement of density can only be made using a single-piece weight and ASTM requires one-piece weights for use as standards and where mass stability is required.

Weight Sets.
Each set is packaged in a sturdy storage case and supplied with tweezers for handling to protect against dirt and body oils. Sets consist of flat weights ranging from 1mg to 500mg and knob-style weights ranging from 1g to 100g. Masses from 1mg through 5mg are aluminum; the remainder are of stainless-steel construction. Custom sets are available and quoted upon request.