Manufactured to international standards (ASTM and OIML), Ohaus loose calibrations weights and calibration mass sets are available in a variety of styles for a wide range of uses.

In addition to the conventional shapes, Ohaus also offers hooked and slotted masses for use in physics. Calibration weights for the continuous accuracy of your electronic balances are available from 1 mg to 50 kg.

• Class 1 (individual metric)
• Class 1 (mass sets)
• Class 4 (individual metric)
• Class 4 (mass sets)
• Class 6 (mass sets)
• Class 6 (individual metric)
• Class 6 (individual avoirdupois)

Also see Sartorius Calibration Masses

Calibration Weight Sets - ASTM Class 1 (Metric)

Item # without Certificate	80781021	80781023	80781025	80781027	80781029	80781031	80781033
Price withouth Cerfificate	$453.60	$774.90	$468.90	$808.20	$485.10	$933.30	$617.40
Item # with Certificate	80781022	80781024	80781026	80781028	80781030	80781032	80781034
Price with Traceable Certificate	$866.70	$1556.10	$848.70	$1664.90	$887.40	$1921.50	$1078.20
Set includes	(1) 1 mg, (2) 2 mg, (1) 5 mg, (1) 10 mg, (2) 20 mg, (1) 50 mg, (1) 100 mg, (2) 200 mg, (1) 500 mg, tweezers, case & foam packaging for each weight	(1) 1 mg, (2) 2 mg, (1) 5 mg, (1) 10 mg, (2) 20 mg, (1) 50 mg, (1) 100 mg, (2) 200 mg, (1) 500 mg, (1) 1 g, (1) 2 g, (1) 5 g, (1)10 g, (2) 20 g, (1) 50 g, tweezers, case & foam packaging for each weight	(1) 1 g, (2) 2 g, (1) 5 g, (1) 10 g, (2) 20 g, (1) 50 g, tweezers, case & foam packaging for each weight	(1) 1 mg, (2) 2 mg, (1) 5 mg, (1) 10 mg, (2) 20 mg, (1) 50 mg, (1) 100 mg, (2) 200 mg, (1) 500 mg, (1) 1 g, (2) 2 g, (1) 5 g, (1) 10 g, (2) 20 g, (1) 50 g, (1) 100 g, tweezers, case & foam packaging for each weight	(1) 1 g, (2) 2 g, (1) 5 g, (1) 10 g, (2) 20 g, (1) 50 g, (1) 100 g, tweezers, case & foam packaging for each weight	(1) 1 mg, (2) 2 mg, (1) 5 mg, (1) 10 mg, (2) 20 mg, (1) 50 mg, (1) 100 mg, (2) 200 mg, (1) 500 mg, (1) 1 g, (2) 2 g, (1) 5 g, (1) 10 g, (2) 20 g, (1) 50 g, (1) 100 g, (1) 200 g, tweezers, case & foam packaging for each weight	(1) 1 g, (2) 2 g, 1 x 5 g, (1) 10 g, (2) 20 g, (1) 50 g, (1) 100 g, (2) 200 g, tweezers, case & foam packaging for each weight
Adjusted to tolerance class	ASTM Class 1
Material	Stainless Steel

Individual Calibration Weights - ASTM Class 1 (Metric)

Calibration Weight Sets - ASTM Class 4 (Metric)

Item Number without Certificate	290-00	291-01	292-01
Photo
Price without Certificate	$233.10	$433.80	$408.60
Item Number with Certificate	290-00/C	291-01/C	292-01/C
Price with Traceable Certificate	$585.00	$1068.30	$1142.10
Set includes	(1) 500 mg, (2) 200 mg, (1) 100 mg, (1) 50 mg, (2) 20 mg, (1) 10 mg, (1) 5 mg, (2) 2 mg, (1) 1 mg, tweezers and carrying case	(1) 50 g, (1) 30 g, (1) 20 g, (1) 10 g, (1) 5 g, (1) 3 g, (1) 2 g, (1) 1 g, (1) 500 mg, (1) 200 mg, (1) 100 mg, (1) 50 mg, (2) 20 mg, (1) 10 mg, (1) 5 mg, (2) 2 mg, (1) 1 mg, tweezers and carrying case	(1) 100 g, (1) 50 g, (1) 30 g, (1) 20 g, (1) 10 g, (1) 5 g, (1) 3 g, (1) 2 g, (1) 1 g, (1) 500 mg, (2) 200 mg, (1) 100 mg, (1) 50 mg, (2) 20 mg, (1) 10 mg, (1) 5 mg, (2) 2 mg, (1) 1 mg, tweezers and carrying case
Adjusted to tolerance class	ASTM Class 4
Material	Stainless Steel

Individual Calibration Weights - ASTM Class 4 (Metric)

Individual Calibration Weights - Class F (Avoirdupois/Metric)

Attachment Weight Sets