Precision Weighing Balances
Your online source for balances, scales & calibration weights @ discount prices

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Need to see if your microbalance from Cahn, Sartorius or Mettler is weighing correctly? The 100 milligram leaf weight could be the simple solution.

Micro Balances should always be checked with reference weights so you know your laboratory balance is weighing accurately. Checking the accuracy of your microbalance can accomplished by carefully placing the weight on the balance's weighing platform and verifying the balance is weighing correctly. Always use coated tweezers to handle the milligram leaf weights. Do NOT handle weights with your fingers. If you touch the calibration weight with your fingers the oil in your skin would change the weight's tolerance. Using tweezers that are not coated can scratch the calibration mass changing the tolerance.

This Class 1 calibration leaf weight (PWB7029-1W) is made from flat 304 stainless steel, includes NVLAP Certificate. The single piece construction calibration weight contain no air cavity or foreign adjusting material, with one end turned up for easy handling, thus providing the maximum mass stability. In addition, it is an ASTM requirement that one-piece weights are used as standards where mass stability is required. The milligram leaf weight possesses low magnetic permeability, good stability and resistance to corrosion.

This 100mg Class 1 mass can be used to verify the calibration on microbalances from Cahn, Mettler XP26, Mettler Toledo XP56DR, Ohaus Discovery DV-215CD, Scientech SM124D, Sartorius Cubis, Scientech SM99, Sartorius CPA26P, Sartorius CPA225 or AND GR202 semi micro balance. You should always check your user manual to verify exactly what calibration weight(s) are recommended by the balance manufacturer to perform balance performance verification checks.

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. If you have questions please call 978-521-7095 before ordering.

Calibration Weights require a 7-10 business day lead time. If you can not work with this lead time please do not place the order since there is no rush service available. To perform proper calibration, weights need adequate time to establish and maintain a thermal equilibrium in the calibration laboratory room before any measurement can be made. All calibration weights are made to order and adjustments to the calibration weight are made on a polishing wheel that generates heat and requires time to reestablish thermal equilibrium before any calibration tolerance checks can be made on a balance. A quality calibration just can not be performed in a matter of a day. If someone tells you otherwise you should question their measurement practices and the quality of the calibration.

Choose from a comprehensive selection of weight sets or individually weights ranging from 30kg to 1mg. We offer Class 0 , Class 1, Class 2, Class 6, Class F. See many more calibration weights at www.calibrationweight.com.

Other Brands 100mg Class 1 Calibration Weight

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Brand Model Capacity Readability
Other Brands 100mg Class 1 Calibration Weight
Modes
Add. Features
  • Grams
Comparable Scales

Other Brands Milligram Weights 1mg-500mg Class 1 NVLAP - $999.00

Other Brands Precision Class 2 - 9 Pc Weight Set - $912.00

Other Brands Precision Class 1 Weights - $2763.00

Other Brands 21 pc Class 2 mass standard set - $1127.00

Other Brands Calibration 9 pc Class 1 Set - $1042.00

Other Brands Traceable 9 pc Weights Set - $688.00

Other Brands 1mg Leaf Weight - $103.00

Other Brands 2 Milligram Leaf Weight - $103.00

Other Brands 5mg Calibration Weight - $103.00

Other Brands Certified 50mg Calibration Weight - $103.00

Other Brands 200mg Standard Class 1 Calibration Weight - $103.00

Other Brands 500mg Calibration Weight - $103.00

Other Brands 20g Calibration Weight - $113.00

Other Brands 1 Gram Calibration Weight - $102.00
MSRP: $125.00
YOU PAY $103.00
Untitled Document
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. If you have questions please call 978-521-7095 before ordering.
Calibration Weights require a 7-10 business day lead time
calibration leaf weights
 
$103.00      Specifications
Size 100mg
Class ASTM Class 1
Tolerance 0.010 mg
Certification NVLAP Accredited Certificate (sample)
Material Flat 304 stainless steel
Construction 1 piece construction with no adjusting cavity with one end turned up for easy handling
Case Supplied with impact-resistant polypropylene case.
 
milligram weights, mass set


(7-10 days lead time for all calibration weights and mass sets)
 
Nominal
Value
Class Part Number Report of
Traceability
NVLAP
Certification
Tolerance Price
Flat Weights, ASTM Shape        
500 mg Class 1 PWB7026-1W NO YES ±0.010 mg
$ 103.00
200 mg Class 1 PWB7028-1W NO YES ±0.010 mg
  $ 103.00
100 mg Class 1 PWB7029-1W NO YES ±0.010 mg
  $ 103.00
50 mg Class 1 PWB7030-1W NO YES ±0.010 mg
  $ 103.00
20 mg Class 1 PWB7032-1W NO YES ±0.010 mg
  $ 103.00
10 mg Class 1 PWB7033-1W NO YES ±0.010 mg
  $ 103.00
5 mg Class 1 PWB7034-1W NO YES ±0.010 mg
  $ 103.00
3 mg Class 1 PWB7035-1W NO YES ±0.010 mg
  $ 103.00
2 mg Class 1 PWB7036-1W NO YES ±0.010 mg
  $ 103.00
1 mg Class 1 PWB7037-1W NO YES ±0.010 mg
  $ 103.00
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 leaf weights
12-piece Weight Set, ASTM shape
Weight Sets,
ASTM Shape
Class Part Number Report of
Traceability
NVLAP
Certificate
Price
Leaf weights.      
1mg-500mg Class 1 PWB7240-1W NO YES
$999.00
1mg-500mg Class 2 PWB7240-2W NO YES
$881.00
1mg-500mg Class 1 PWB7240-1T YES NO
$782.00
1mg-500mg Class 2 PWB7240-2T YES NO
$652.00
Weights Included: 1 mg, 2 x 2 mg, 5 mg, 10 mg, 2 x 20 mg, 50 mg, 100 mg, 2 x 200 mg, 500 mg
 
precision lab calibration weights

Construction and General Shape:

Troemner Calibration Weights 1 gram and larger consist of a body and a lifting knob. The lifting knob is specifically designed for use with forceps, tweezers or some other lifting device. Weight bottoms are slightly recessed to expose the smallest possible area to wear. Each weight is marked with its nominal value.

Weights 500 mg and lower are made of sheet metal and are one-piece construction with one side turned up to make them easy to handle with forceps. Depending on the class, these weights may or may not be marked with their nominal value.
precision calibration weights

Surface Finish:

All surfaces are polished to a perfect, mirror-like finish and conform to specifications in ANSI/ASTM E617
precision calibration weight storage case
 

Polycarbonate Cases for Individual Weights:

To safeguard your Troemner Alloy 8 Stainless Steel Precision Calibration Weights, attractive, durable, high quality, polycarbonate cases are provided with weights 1 mg through 2 kg. The polycarbonate cases feature a custom insert, bumper, and locking lid to assure weights are held securely within the case and avoid movement. Polycarbonate cases for weights greater than 2kg are available at an additional cost.

Selecting The Right Weight:

  • Check you scale's manual or specification sheet to find the weight value required to calibrate your scale.
  • It is recommended that the weight selected to calibrate a balance and/or scale have a tolerance small enough as not to be detected by the balance and/or scale. Troemner recommends the tolerance of a weight selected for calibrating a balance and/or scale is no more than 1/3 of the readability or precision of the balance and/or scale being calibrated. If this cannot be achieved, it is suggested that a Class 1 Electronic Balance Calibration Weight with a NVLAP certificate be ordered which provides the actual mass value for the weight which reduces measurement uncertainty.
  • Electronic Balance Calibration Weights can also be used to check or verify the accuracy of your balance and/or scale between calibrations. It is recommended that the user check a balance and/or scale prior to each use. Keeping the weight at or near the balance and/or scale keeps the weight at the same temperature as the equipment.

laboratory weights

(7-10 days lead time for all calibration weights and mass sets)
Nominal
Value
Class Part Number Report of
Traceability
NVLAP
Certification
Tolerance Price
Small Knob Style, ASTM Shape        
2000 g Class 1 PWB7012-1W NO YES ±5.00 mg
$820.00
1000 g Class 1 PWB7013-1W NO YES ±2.50 mg
$565.00
500 g Class 1 PWB7014-1W NO YES ±1.2 mg
$287.00
300 g Class 1 PWB7015-1W NO YES ±0.75 mg
$237.00
200 g Class 1 PWB7016-1W NO YES ±0.50 mg
$235.00
100 g Class 1 PWB7017-1W NO YES ±0.250 mg
$139.00
50 g Class 1 PWB7018-1W NO YES ±0.120 mg
$126.00
30 g Class 1 PWB7019-1W NO YES ±0.074 mg
$125.00
20 g Class 1 PWB7020-1W NO YES ±0.074 mg
$125.00
10 g Class 1 PWB7021-1W NO YES ±0.050 mg
$125.00
5 g Class 1 PWB7022-1W NO YES ±0.034 mg
$125.00
2 g Class 1 PWB7024-1W NO YES ±0.034 mg
$125.00
1 g Class 1 PWB7025-1W NO YES ±0.034 mg
$125.00
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.
 
What is the difference in tolerance between Class 1, Class 2 and other calibration specifications?
 
Metric Weight Tolerances - all tolerances stated in milligram (mg)
  American Society of Testing & Measurement ASTM E617 International Organization of Legal
Metrology Recommendation R111
Denomi-
nation
Metric
Class 1
mg
Class 2
mg
Class 3
mg
Class 4
mg
Class 5
mg
Class 6
mg
Class 7
mg
  E1
mg
E2
mg
F1
mg
F2
mg
M1
mg
M2
mg
5 kg 12 25 50 100 250 500 1400   2.5 7.5 25 75 250 750
3 kg 7.5 15 30 60 150 300 1000              
2 kg 5.0 10 20 40 100 200 750   1.0 3.0 10 30 100 300
1 kg 2.5 5.0 10 20 50 100 470   0.5 1.5 5 15 50 150
500 g 1.2 2.5 5.0 10 30 50 300   0.25 0.75 2.5 7.5 25 75
300 g 0.75 1.5 3.0 6.0 20 30 210              
200 g 0.50 1.0 2.0 4.0 15 20 160   0.1 0.30 1.0 3.0 10 30
100 g 0.25 0.50 1.0 2.0 9 10 100   0.05 0.15 0.5 1.5 5 15
50 g 0.12 0.25 0.60 1.2 5.6 7     0.030 0.10 0.30 1.0 3.0 10
30 g 0.074 0.15 0.45 0.90 4.0 5 44              
20 g 0.074 0.10 0.35 0.70 3.0 3 33   0.025 0.080 0.25 0.8 2.5 8
10 g 0.050 0.074 0.25 0.50 2.0 2 21   0.020 0.060 0.20 0.6 2 6
5 g 0.034 0.054 0.18 0.36 1.3 2 13   0.015 0.050 0.15 0.5 1.5 5
3g 0.034 0.054 0.15 0.30 0.95 2 9.4              
2 g 0.034 0.054 0.13 0.26 0.75 2 7.0   0.012 0.040 0.12 0.4 1.2 4
1 g 0.034 0.054 0.10 0.20 0.50 2 4.5   0.010 0.030 0.10 0.3 1.0 3
500 mg 0.010 0.025 0.080 0.16 0.38 1 3.0   0.008 0.025 0.08 0.25 0.80 2.5
200 mg 0.010 0.025 0.060 0.12 0.26 1 1.8   0.006 0.020 0.06 0.20 0.6 2
100 mg 0.010 0.025 0.050 0.10 0.20 1 1.2   0.005 0.015 0.05 0.15 0.5 1.5
50 mg 0.010 0.014 0.042 0.085 0.16 0.5 0.88   0.004 0.012 0.04 0.12 0.4  
20 mg 0.010 0.014 0.035 0.070 0.12 0.5 0.56   0.003 0.010 0.03 0.10 0.30  
10 mg 0.010 0.014 0.030 0.060 0.10 0.5 0.4   0.002 0.008 0.025 0.08 0.25  
5 mg 0.010 0.014 0.028 0.055 0.080 0.2     0.002 0.006 0.020 0.06 0.20  
2 mg 0.010 0.014 0.025 0.050 0.060 0.2     0.002 0.006 0.020 0.06 0.20  
1 mg 0.010 0.014 0.025 0.050 0.050 0.1     0.002 0.006 0.020 0.06 0.20  
The table above is a listing of the tolerances of various classes of masses.  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.
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.
 
Certificate Options
Traceable Certificate
The Traceable Certificate is designed for those laboratories and companies that require traceability, but do not need to meet any stringent regulatory requirements. The Traceable Certificate measurement process is based on a single standard and utilizes one series of comparisons The Traceable Certificate includes nominal value, mass correction, uncertainty and tolerance for each weight in addition to the basic customer information such as name, address, purchase order number, date of calibration, accuracy class, density and statement of traceability to NIST.

Traceable Certificate Example Traceable Certificate (click)
NVLAP Weight Calibration Certificate

The NVLAP Accredited Certificate provides compliance in both measurement process and data reported to the customer to meet a variety of standards including NVLAP Handbook 150-2, ISO/IEC 9000, ISO/IEC 17025, FDA, GMP, GLP, DOD, ANSI/NCSL Z540-1, and nuclear requirements. The NIST administered National Voluntary Laboratory Accreditation Program (NVLAP) approves, through periodic audits, all processing and weighing procedures, as well as certificate format and content. Calibration procedures vary by tolerance class requested. For example, for higher accuracy classes such as Troemner Class 0 and 1. Troemner performs a multiple weighing procedure utilizing their secondary working standards to determine the mass of a customer's weight. Procedures and processes used to generate this multi-page certificate, as well as its format and content, are prescribed by NVLAP. Users held absolutely accountable for their weights should order weights with NVLAP certification.

  • Customer name & address
  • Date of calibration
  • Equipment and standards used in the calibration
  • Accuracy class
  • True mass value (mass in a vacuum)
  • "As found" mass correction (for recalibration) and "as left" mass corrections for each weight
  • Uncertainty of measurement process for each weight. Uncertainty to tolerance ratios are guaranteed.
  • Environmental conditions during test
  • Construction and density of the weight(s)
  • Calibration procedure used
  • A statement of traceability to NIST
  • Helpful list of terms and definitions

NVLAP Calibration Certificate Example NVLAP Calibration Certificate (click)

 

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