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Troemner Class 1 Electronic Balance Weights 0.001 lb - 50 lb and 1/32oz - 8 oz
Can be used as a reference standard in calibrating other weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.1 mg to 0.01 mg. Troemner
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Troemner
Electronic Balance Weights
Class 1
0.001 lb - 50 lb, 01/32oz - 8 oz


Can be used as a reference standard in calibrating other weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.1 mg to 0.01 mg.More ...

Troemner Avoirdupois Stainless Steel, Electronic Balance Weights Class 1

Note: Troemner calibration weights may have up to a 7 day lead time
Weight Class 1 No Cert Class 1 w/ Traceable Cert. Class 1 W/NVLAP
Part# Price Part# Price Part# Price
0.001 lb 8556 $46.54
buy now 8556T $86.06
buy now 8556W $113.69
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0.002 lb 8554 $46.54
buy now 8554T $86.06
buy now 8554W $113.69
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0.005 lb 8552 $46.54
buy now 8552T $86.06
buy now 8552W $113.69
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0.01 lb 8550 $46.54
buy now 8550T $86.06
buy now 8550W $113.69
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0.02 lb 8548 $46.54
buy now 8548T $86.06
buy now 8548W $113.69
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0.05 lb 8546 $56.25
buy now 8546T $96.98
buy now 8546W $126.90
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0.1 lb 8544 $56.25
buy now 8544T $96.98
buy now 8544W $126.90
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0.2 lb 8542 $56.25
buy now 8542T $96.98
buy now 8542W $126.90
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0.5 lb 8540 $79.43
buy now 8540T $150.53
buy now 8540W $207.00
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1 lb 8520 $111.60
buy now 8520T $185.18
buy now 8520W $240.30
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2 lb 8518 $135.90
buy now 8518T $211.50
buy now 8518W $262.80
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3 lb 8516 $150.98
buy now 8516T $251.10
buy now 8516W $324.00
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4 lb 8514 $172.80
buy now 8514T $273.60
buy now 8514W $345.60
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5 lb 8512 $178.20
buy now 8512T $279.00
buy now 8512W $350.10
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10 lb 8510 $351.00
buy now 8510T $456.30
buy now 8510W $516.60
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10 lb Grip 8508 $661.50
buy now 8508T $729.00
buy now 8508W $772.20
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20 lb Grip 8506 $793.80
buy now 8506T $855.00
buy now 8506W $889.20
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25 lb Grip 8504 $834.30
buy now 8504T $894.60
buy now 8504W $924.30
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30 lb Grip 8502 $1,081.80
buy now 8502T $1,131.30
buy now 8502W $1,149.30
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50 lb Grip 8500 $1,338.30
buy now 8500T $1,338.30
buy now 8500W $1,377.90
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Weight Class 1 No Cert Class 1 w/ Traceable Cert. Class 1 W/NVLAP
Part# Price Part# Price Part# Price
1/32 oz 8538 $49.28
buy now 8538T $91.13
buy now 8538W $120.38
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1/16 oz 8536 $49.28
buy now 8536T $91.13
buy now 8536W $120.38
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1/8 oz 8534 $49.28
buy now 8534T $91.13
buy now 8534W $120.38
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1/4 oz 8532 $49.28
buy now 8532T $91.13
buy now 8532W $120.38
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1/2 oz 8530 $89.10
buy now 8530T $129.60
buy now 8530W $156.60
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1 oz 8528 $92.03
buy now 8528T $133.20
buy now 8528W $158.40
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2 oz 8526 $94.95
buy now 8526T $136.58
buy now 8526W $140.95
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4 oz 8524 $97.65
buy now 8524T $141.53
buy now 8524W $201.15
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8 oz 8522 $103.50
buy now 8522T $150.53
buy now 8522W $207.00
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General Information

Troemner Alloy 8 Stainless Steel Precision Metric Weights are available in Troemner UltraClass, and ANSI/ASTM E617 Classes 0, 1, 2, 3 and 4. Troemner Alloy 8 Stainless Steel Precision Avoirdupois Weights are available in ANSI/ASTM E617 Classes 1, 2, 3, and 4. ANSI/ASTM Class weights meet or exceed specifications as defined in the ANSI/ASTM E617 standard. The weights are manufactured of the finest stainless steels available including Troemner Alloy 8 Stainless Steel, which was developed by Troemner and is available exclusively through Troemner. This unique material possesses low magnetic susceptibility, uniform consistency and high resistance to corrosion. It is the finest grade of stainless steel available and is similar to material originally specified in the manufacture of state primary standards.

Weight specifications are designed so the specifications on surface finish, markings, construction, material density and magnetic properties get more restrictive as the weight tolerances get smaller in order to enable the weight to maintain its tolerance over time. These weights are designed for your most demanding weighing applications.

**Caution** Class 0 weights have extremely small tolerances and are intended to be used as primary reference standards with direct traceability to national reference standards. They should be used in extremely stable environments and handled with the highest level of care. Otherwise, due to their one-piece design, Class 0 weights will not maintain their measured value within the tolerance class. One may be tempted to purchase the weights with the tightest tolerances in order to reduce measurement uncertainty. However, frequency of use, care, handling and environmental conditions all play a major role in the long term stability of weights and these factors should be considered before purchasing Class 0 weights.

Why UltraClass?

Troemner UltraClass weights are the most precise two-piece weights available with weight tolerances 50% greater than ANSI/ASTM E617 Class 1 tolerances. Troemner UltraClass weights combine high precision with the advantage of two-piece construction (1g and larger) avoiding costly replacement issues associated with one-piece weights.

Tolerance Classes

ANSI/ASTM E617 Classes with small numerical designations represent smaller tolerances. Troemner UltraClass weight tolerances are 50% better than ANSI/ASTM E617 Class 1. Please see the Tolerance Chart within the Mass Standards Handbook for the specific tolerances of each weight in any given class.

Construction and General Shape

  • 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.
  • Troemner Calibration Weights 1 g 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 (except Class 0 weights) is marked with its nominal value.
  • Troemner Calibration Weights are available in either one-piece or two-piece construction. One-piece construction indicates the weight is manufactured from a single uniform piece of raw material, the weight has no other material added to it, and it has no method of adjustment other than removing material by grinding or polishing. One-piece weights are difficult to manufacture as the only method of final adjustment is removing material by polishing. Two-piece construction means the weight is made of multiple pieces of raw material. Sheet metal weights 500 mg and below are always one-piece construction.
  • Class 0 weights 1 g and larger are of one-piece construction using Troemner Alloy 8 Stainless Steel, which has a consistent density. Class 0 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. There are no markings indicating nominal value on any Class 0 weights. Nominal value of weights 500 mg and below are determined by their shape as listed in the table below:


  • Shape Denomination
    Pentagon 500 mg 50 mg 5 mg
    Square 200 mg 20 mg 2 mg
    Triangle 100 mg 10 mg 1 mg


  • Troemner UltraClass and ANSI/ASTM Classes 1, 2, 3 and 4 weights 1 g and larger are produced from two pieces of material. The body of the weight is one piece and the knob of the weight is the second piece. The knob has a thread that screws into the body and is tightened. There is a cavity below the knob thread in the body which contains adjusting material, typically the same material from which the weight is made. Weights 500 mg and below are made of sheet metal and are one-piece construction with one side turned up to make them easy to handle with forceps. Corners and edges are smooth. The nominal value of each weight is etched or stamped on the top surface of the weight and their shape is square.
  • Milligram Wire Weights - Troemner Calibration Weights 500 mg and below are also available in wire construction as opposed to sheet metal with the shape denoting the nominal value as listed in the following table. These weights are constructed with one end turned up to allow for easy handling with forceps.
  • The Sheet Metal Weights come standard with the weight products. To order Milligram Wire Weights, specify the Troemner part number followed by "-WIRE".

    Surface Finish

    All surfaces are polished to a perfect, mirror-like finish and conform to specifications in ANSI/ASTM E617.

    Suggested Applications

  • Class 0 weights are intended to be used in metrology laboratories where the stability of the environment and careful handling are assured. Although very stable, one-piece construction Class 0 weights have no method of adjustment and are not suitable for general laboratory use.
  • Material Specifications for Class 0 weights

    BASE MATERIAL DENSITY WEIGHT RANGE
    Troemner Alloy 8 8.0 g/cm3 at 20°C 1 g and larger
    Stainless Steel 7.95 g/cm3 at 20°C 10 mg to 500 mg**
    Aluminum 2.7 g/cm3 at 20°C 5 mg and smaller
      **30 mg weights are aluminum

    Material Specifications for Troemner UltraClass, Classes 1, 2, 3 and 4

    BASE MATERIAL DENSITY WEIGHT RANGE
    Stainless Steel 7.95 g/cm3 at 20°C 2 kg and larger
    Troemner Alloy 8 8.0 g/cm3 at 20°C 1 g up to 1 kg
    Stainless Steel 7.95 g/cm3 at 20°C 5 mg to 500 mg**
    Aluminum 2.7 g/cm3 at 20°C 3 mg and smaller
      **30 mg weights are aluminum

  • Troemner UltraClass weights can be also be used as reference standards as well as calibrating Class I balances as specified in OIML R 76. Troemner UltraClass weights can also be used to calibrate Class 1 weights
  • Class 1 weights can be used to calibrate certain Class I and Class II balances and scales as specified in OIML R 76. Class 1 weights can also be used to calibrate Class 2 weights.
  • Class 2 weights can be used to calibrate weighing instruments for important commercial transactions like gold and precious stones. They can also be used to calibrate Class 3 weights.
  • Class 3 weights can be used for calibrating balances with moderate precision, with a readability as low as 0.1 g to 0.01 g.
  • Class 4 weights can be used for calibration of semi-analytical balances and for student use
  • Presentation

  • All Troemner weight sets are supplied in protective cases.
  • Troemner weight sets where the largest weight is 200 g and lower are supplied in attractive, durable polypropylene cases with a compartment for each weight within the case. There is also a compartment for forceps. The cases are designed so that each weight will stay in its compartment.
  • Troemner weight sets, where the largest weight is 500 g and larger are supplied in handcrafted wood cases. Within the interior of the wood case is contained a polypropylene case to hold weights 200 g and below with compartments for each weight. For weights larger than 200 g, a velvet lined compartment for each weight exists within the wood case. There are also compartments for lifters and forceps supplied with each weight set.
  • Troemner supplies appropriate lifting devices such as forceps, gloves, and other lifting forks sufficient to handle every weight in the set.
  • Troemner individual weights are not supplied in cases. However, protective cases in either wood or polypropylene are available for an extra charge. Wood cases for individual weights are available for weights 1 g and larger. These handcrafted cases feature a fine wood exterior with an interior compartment that is either fully lined with padded velvet or velour for the given weight or the case has a foam interior.
  • **Caution** Weight cases are not intended to be used as shipping containers. When you ship your weights to be calibrated, the weights and weight sets must be overpacked in larger containers and/or cartons to protect your weight cases.

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