Precision Weighing Balances
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1 milligram Ulti Mass Class U calibration leaf weight (WT1MGCLSUC), Flat Weight, ASTM Shape, includes Certificate of Calibration.  The leaf weight is traceable to National Institute of Standards and Technology (NIST) standards.  Individual weight is packed in a plastic vial and then in bubble envelope.  Typical lead time is 5 to 7 business days from the date order is placed to shipping from NVLAP metrology lab located Arvata, Colorado.

Single-piece construction: Because the precise measurement of density can only be achieved using a single piece weight, all Sartorius weights are ASTM Type 1 single-piece weights.  This weight contain no air cavity or foreign adjusting material, thus providing the maximum mass stability.  In addition, it is an ASTM requirement that one-piece weights are used as standards and where mass stability is required.

This Ultra Class U Mass Standard provide the greatest precision we offer.  Ideal for use as reference standards to calibrate other weights or verify the calibration on high-resolution microbalances including the Sartorius ME5 micro balance, Mettler-Toledo MX5, Mettler Toledo UMX2, Scientech SM50, or A&D GH-252 semi micro balance. 

The mass standards produced by Sartorius today are designed to meet or exceed the standards of the American Society of Testing Materials (ASTM E617)

We offer a choice of 21, 17, 16, 9, 8 and 5 piece weight sets or individually weights ranging from 5kg to 1mg.  See the complete offering of calibration weights here.

Sartorius 1mg Leaf Weight

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Brand Model Capacity Readability
Sartorius 1mg Leaf Weight
Modes
Add. Features
  • Grams
Comparable Scales

Sartorius 21 pc Class 2 Mass Set - $1229.00
Sartorius Ultra Class Traceable - $949.00

Sartorius 21 pc mass standard set - $849.00
Sartorius Ultra Calibration Mass Se - $599.00

Sartorius 2 Milligram Leaf Wgt - $89.00
Sartorius Traceable 5mg Cal Weight - $89.00

Sartorius Traceable 10mg Cal Weight - $94.00
Sartorius Certified 50mg Cal Weight - $94.00
MSRP: $90.00
YOU PAY $89.00
Untitled Document
calibration weights
Certified Calibration Weights from Sartorius
  • 1 mg to 5 kg weights.  Sold individually or as a 9-piece or 21-piece set.
  • All weights meet or exceed ASTM specifications
  • All mass measurements are made using procedures developed by NIST
  • All mass standards are milled from the finest corrosion-resistant stainless steel stock ensuring consistent density
  • Each weight is calibrated by a NVLAP-accredited metrology lab in a climate-controlled environment
  • One-piece construction provides the maximum mass stability
  • Each weight and weight set is supplied complete with a Certificate of Traceability
  • Certificate of Calibration

Individual Calibration Weights


milligram weights, mass set
Photo shown above for the flat weights are of OIML specification weights.
The ASTM weights are actually square in their shape.
 
Nominal
Value		 Class Part Number Report of
Traceability		 Certificate of
Calibration		 Tolerance Price
Flat Weights, ASTM Shape        
500 mg Ulti Mass WT500MGCLSUC NO YES ±0.005 mg $99.00
500 mg Class 1 WT500MGCLS1C NO YES ±0.010 mg
$74.00
500 mg Class 2 WT500MGCLS2C NO YES ±0.025 mg
$69.00
200 mg Ulti Mass WT200MGCLSUC NO YES ±0.005 mg
$99.00
200 mg Class 1 WT200MGCLS1C NO YES ±0.010 mg
$74.00
200 mg Class 2 WT200MGCLS2C NO YES ±0.025 mg
$69.00
100 mg Ulti Mass WT100MGCLSUC NO YES ±0.005 mg
$99.00
100 mg Class 1 WT100MGCLS1C NO YES ±0.010 mg
$74.00
100 mg Class 2 WT100MGCLS2C NO YES ±0.025 mg
$69.00
50 mg Ulti Mass WT50MGCLSUC NO YES ±0.005 mg
$94.00
50 mg Class 1 WT50MGCLS1C NO YES ±0.010 mg
$74.00
50 mg Class 2 WT50MGCLS2C NO YES ±0.014 mg
$69.00
20 mg Ulti Mass WT20MGCLSUC NO YES ±0.005 mg
$94.00
20 mg Class 1 WT20MGCLS1C NO YES ±0.010 mg
$69.00
20 mg Class 2 WT20MGCLS2C NO YES ±0.014 mg
$64.00
10 mg Ulti Mass WT10MGCLSUC NO YES ±0.005 mg
$94.00
10 mg Class 1 WT10MGCLS1C NO YES ±0.010 mg
$69.00
10 mg Class 2 WT10MGCLS2C NO YES ±0.014 mg
$64.00
5 mg Ulti Mass WT5MGCLSUC NO YES ±0.005 mg
$89.00
5 mg Class 1 WT5MGCLS1C NO YES ±0.010 mg
$74.00
5 mg Class 2 WT5MGCLS2C NO YES ±0.014 mg
$69.00
2 mg Ulti Mass WT2MGCLSUC NO YES ±0.005 mg
$89.00
2 mg Class 1 WT2MGCLS1C NO YES ±0.010 mg
$74.00
2 mg Class 2 WT2MGCLS2C NO YES ±0.014 mg
$69.00
1 mg Ulti Mass WT1MGCLSUC NO YES ±0.005 mg
$89.00
1 mg Class 1 WT1MGCLS1C NO YES ±0.010 mg
$74.00
1 mg Class 2 WT1MGCLS2C NO YES ±0.014 mg
$69.00
The weight value can deviate above or below the nominal value by the tolerance defined.  To determine the tolerance of a mass, look at the denomination or nominal value of the weight and the appropriate class you need.
Custom weight sets are available upon request by calling
Precision Weighing Balances at 978-521-7095
All calibration weights are not returnable.  Once your order has been placed it CAN NOT be cancelled.  Please carefully consider this prior to placing your order.  The reason for this is these weights are custom manufactured and are certified on the date they were made.  In addition, if you touch the calibration weight with your fingers the oil in your skin would change the tolerance and we can not take this chance if the weight was returned.
milligram certified weights
milligram calibration weight
micro balance leaf weights
1mg to 2g individual weights are packed in a plastic vial and then in bubble envelope
5g to 50g individual weights are shipped in a high quality, durable hard plastic weight case
100g to 5kg individual weights are shipped in a high quality, durable hard plastic weight case with one (1) lint free glove


Sartorius Calibration Weights

(select the calibration weight & any of the options below and then the "BUY HERE" image)