Precision Test Weights

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Precision Test Weights with Calibration Certificate

Class 1

Class 4

Often used to calibrate precision scales, these highly accurate test weights come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They are marked with their weight.

Class 1 weights are highly accurate and used as a reference standard for calibrating other calibration weights. They are also good for calibration of microbalances and analytical balances.

Class 4 weights are good for calibrating precision balances, laboratory balances, and digital scales.

Class 1
Wt.	Tolerance	Dia.	Ht.	Material	Specifications Met	Includes		Each
30 g	-0.000074 g to 0.000074 g	3/4"	5/8"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	0000000
40 g	-0.000074 g to 0.000074 g	3/4"	13/16"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
50 g	-0.000097 g to 0.000097 g	3/4"	1"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
100 g	-0.00025 g to 0.00025 g	1"	1 1/16"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
150 g	-0.000375 g to 0.000375 g	1 1/8"	1 3/16"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
200 g	-0.0005 g to 0.0005 g	1 3/16"	1 9/16"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
300 g	-0.00075 g to 0.00075 g	1 1/2"	1 1/2"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
400 g	-0.000975 g to 0.000975 g	1 1/2"	1 7/8"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
500 g	-0.0012 g to 0.0012 g	1 1/2"	2 5/16"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
1,000 g	-0.0025 g to 0.0025 g	2"	2 9/16"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
2 kg	-0.000005 kg to 0.000005 kg	2 1/2"	3 5/16"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
4 kg	-0.000975 kg to 0.000975 kg	3"	4 9/16"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
5 kg	-0.000012 kg to 0.000012 kg	3 1/4"	4 7/8"	Stainless Steel	ASTM E617 Class 1	Glove, Plastic Case	00000000	000000
Class 4
30 g	-0.009 g to 0.009 g	3/4"	5/8"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
40 g	-0.00105 g to 0.00105 g	3/4"	13/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
50 g	-0.0012 g to 0.0012 g	3/4"	1"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
100 g	-0.002 g to 0.002 g	1"	1 1/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
150 g	-0.003 g to 0.003 g	1 1/8"	1 3/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
200 g	-0.004 g to 0.004 g	1 3/16"	1 9/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
300 g	-0.006 g to 0.006 g	1 7/16"	1 7/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
400 g	-0.008 g to 0.008 g	1 7/16"	1 15/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
500 g	-0.01 g to 0.01 g	1 1/2"	2 5/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
1,000 g	-0.02 g to 0.02 g	2"	2 9/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
2 kg	-0.00004 kg to 0.00004 kg	2 1/2"	3 5/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
4 kg	-0.00008 kg to 0.00008 kg	3"	4 9/16"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000
5 kg	-0.0001 kg to 0.0001 kg	3 3/16"	4 7/8"	Stainless Steel	ASTM E617 Class 4	Glove, Plastic Case	000000000	000000

Precision Test Weight Sets with Calibration Certificate

9-Piece Set

17-Piece Set

21-Piece Set

These highly accurate test weight sets for calibrating precision scales come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. Each test weight is marked with its weight.

Class 1 weights are highly accurate and used as a reference standard for calibrating other calibration weights. They are also good for calibration of microbalances and analytical balances.

Class 4 weights are good for calibrating precision balances, laboratory balances, and digital scales.

Class 1
Number of Pieces	Includes	Material	Specifications Met		Each
9	Test Weights (1 each): 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 2 g, 20 g Plastic Case	Stainless Steel	ASTM E617 Class 1	0000000	000000000
17	Test Weights (1 each): 10 mg, 50 mg, 100 mg, 500 mg, 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 20 mg, 200 mg, 2 g, 20 g Plastic Case	Stainless Steel	ASTM E617 Class 1	0000000	00000000
21	Test Weights (1 each): 1 mg, 5 mg, 10 mg, 50 mg, 100 mg, 500 mg, 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 2 mg, 20 mg, 200 mg, 2 g, 20 g Plastic Case	Aluminum, Stainless Steel	ASTM E617 Class 1	0000000	00000000
Class 4
9	Test Weights (1 each): 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 2 g, 20 g Plastic Case	Stainless Steel	ASTM E617 Class 4	0000000	000000
17	Test Weights (1 each): 10 mg, 50 mg, 100 mg, 500 mg, 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 20 mg, 200 mg, 2 g, 20 g Plastic Case	Stainless Steel	ASTM E617 Class 4	0000000	00000000
21	Test Weights (1 each): 1 mg, 5 mg, 10 mg, 50 mg, 100 mg, 500 mg, 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 2 mg, 20 mg, 200 mg, 2 g, 20 g Plastic Case	Aluminum, Stainless Steel	ASTM E617 Class 4	0000000	00000000

30 g to 500 g

1,000 g to 5 kg

Our most accurate test weights, these are often used to calibrate precision scales. They are marked with their weight.

For technical drawings and 3-D models, click on a part number.

Wt.	Tolerance	Dia.	Ht.	Material	Class	Specifications Met	Includes		Each
30 g	-0.000074 g to 0.000074 g	3/4"	5/8"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	0000000
50 g	-0.000097 g to 0.000097 g	3/4"	1"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
100 g	-0.00025 g to 0.00025 g	1"	1 1/16"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
150 g	-0.000375 g to 0.000375 g	1 1/8"	1 3/16"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
200 g	-0.0005 g to 0.0005 g	1 3/16"	1 9/16"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
300 g	-0.00075 g to 0.00075 g	1 1/2"	1 1/2"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
400 g	-0.000975 g to 0.000975 g	1 1/2"	1 7/8"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
500 g	-0.0012 g to 0.0012 g	1 1/2"	2 5/16"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
1,000 g	-0.0025 g to 0.0025 g	2"	2 9/16"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
2 kg	-0.000005 kg to 0.000005 kg	2 1/2"	3 5/16"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
4 kg	-0.000975 kg to 0.000975 kg	3"	4 9/16"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000
5 kg	-0.000012 kg to 0.000012 kg	3 1/4"	4 7/8"	Stainless Steel	1	ASTM E617 Class 1	Glove; Plastic Case	00000000	000000

Precision Test Weight Sets

9-Piece Set

17-Piece Set

21-Piece Set

Use these highly accurate test weight sets to calibrate precision scales. Each test weight is marked with its weight.

Number of Pieces	Includes	Material	Class	Specifications Met		Each
9	Test Weights (1 each): 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 2 g, 20 g Plastic Case	Stainless Steel	1	ASTM E617 Class 1	0000000	0000000
17	Test Weights (1 each): 10 mg, 50 mg, 100 mg, 500 mg, 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 20 mg, 200 mg, 2 g, 20 g Plastic Case	Stainless Steel	1	ASTM E617 Class 1	0000000	00000000
21	Test Weights (1 each): 1 mg, 5 mg, 10 mg, 50 mg, 100 mg, 500 mg, 1 g, 5 g, 10 g, 50 g, 100 g Test Weights (2 each): 2 mg, 20 mg, 200 mg, 2 g, 20 g Plastic Case	Aluminum, Stainless Steel	1	ASTM E617 Class 1	0000000	00000000