OIML Class E2 Calibration Weights With NIST Certificate

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OIML Class E2 Calibration Weights With NIST Certificate


OIML Class E2 Calibration Weights With NIST Certificate

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OIML Class E2 Calibration Weights With NIST Certificate

These weights include a certification certificate. NIST NVLAP.

Please allow one week for the certification process before shipping.
1mg
2mg
5mg
10mg
20mg
1mg
2mg
5mg
10mg
20mg
In Stock: 
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SKU:80780284
SKU:80780285
SKU:80780286
SKU:80780287
SKU:80780288
Our Price:  $107.00
 Now: $92.70 
Our Price:  $103.00
 Now: $92.70 
Our Price:  $103.00
 Now: $92.70 
Our Price:  $103.00
 Now: $92.70 
Our Price:  $103.00
 Now: $92.70 
 
 
 
 
 
50mg
100mg
200mg
500mg
1g
50mg
100mg
200mg
500mg
1g
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Yes
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Yes
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Yes
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Yes
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Yes
SKU:80780289
SKU:80780290
SKU:80780291
SKU:80780292
SKU:80780293
Our Price:  $103.00
 Now: $92.70 
Our Price:  $103.00
 Now: $92.70 
Our Price:  $103.00
 Now: $92.70 
Our Price:  $103.00
 Now: $92.70 
Our Price:  $120.00
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2g
5g
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2g
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10g
20g
50g
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Yes
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Yes
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Yes
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Yes
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Yes
SKU:80780294
SKU:80780295
SKU:80780296
SKU:80780297
SKU:80780298
Our Price:  $120.00
 Now: $108.00 
Our Price:  $120.00
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Our Price:  $131.00
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Our Price:  $131.00
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Our Price:  $144.00
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100g
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500g
1kg
2kg
100g
200g
500g
1kg
2kg
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Yes
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Yes
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Yes
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Yes
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Yes
SKU:80780299
SKU:80780300
SKU:80780301
SKU:80780302
SKU:80780303
Our Price:  $179.00
 Now: $161.10 
Our Price:  $215.00
 Now: $193.50 
Our Price:  $322.00
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Our Price:  $501.00
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Our Price:  $716.00
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5kg
10kg
20kg
5kg
10kg
20kg
In Stock: 
Yes
In Stock: 
Yes
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Yes
SKU:80780304
SKU:80780305
SKU:80780306
Our Price:  $1,008.00
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Our Price:  $1,731.00
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Our Price:  $2,623.00
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All sales on calibration weights are FINAL. Once you place an order for a calibration weight, it may not be canceled. Please be sure you have the correct item before you place your order. Calibration weights are custom manufactured and are certified on the date they are created there is a 4-6 week lead time prior to shipment. In addition, simply touching these weights with your hand can change the tolerance due to the oil in your skin. We will not accept any exchanges or refunds on calibration weights. No exceptions.

Which calibration weight should you choose?
A balance should be calibrated using a weight with a class tolerance factor greater than the readability of the balance.  For example if your balance has a readability of 1mg it should be calibrated with a weight having a known tolerance of .1mg or less.

What are the class differences?

OIML E2
provides the greatest precision we offer.  They are ideal for use as reference standards to calibrate other weights or for calibrating high-resolution analytical balances. The OIML E2 tolerance is approximately two times the precision of ANSI/ASTM Class 1.

ANSI/ASTM Class 1
can be used as reference standard in calibrating other weights and appropriate for calibrating high-precision analytical balances (from 0.01mg to 0.1mg).

ANSI/ASTM Class 2 Appropriate for calibrating high-precision toploading balances with readabilities ranging from 0.001g to 0.01g.

ANSI/ASTM Class 3
Appropriate for calibrating balances with moderate precision, ranging from 0.01g to 0.1g.

ANSI/ASTM Class 4
Appropriate for student use and semi-analytical weighing.

NIST Class F
Used to test commercial weighing devices by state and local weights and measures officials, device installers and service technicians. Class F weights may be used to test most accuracy class III scales, all scales of class III L or IIII, and scales not marked with a class designation.

Metric Weight Tolerances - all tolerances stated in milligram (mg)
  (ASTM) American Society of Testing & Measurement
Denomi-
nation
Metric
Class 1
mg
Class 2
mg
Class 3
mg
Class 4
mg
Class 5
mg
Class 6
mg
Class 7
mg
5 kg 12 25 50 100 250 500 1400
3 kg 7.5 15 30 60 150 300 1000
2 kg 5.0 10 20 40 100 200 750
1 kg 2.5 5.0 10 20 50 100 470
500 g 1.2 2.5 5.0 10 30 50 300
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
100 g 0.25 0.50 1.0 2.0 9 10 100
50 g 0.12 0.25 0.60 1.2 5.6 7  
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
10 g 0.050 0.074 0.25 0.50 2.0 2 21
5 g 0.034 0.054 0.18 0.36 1.3 2 13
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
1 g 0.034 0.054 0.10 0.20 0.50 2 4.5
500 mg 0.010 0.025 0.080 0.16 0.38 1 3.0
200 mg 0.010 0.025 0.060 0.12 0.26 1 1.8
100 mg 0.010 0.025 0.050 0.10 0.20 1 1.2
50 mg 0.010 0.014 0.042 0.085 0.16 0.5 0.88
20 mg 0.010 0.014 0.035 0.070 0.12 0.5 0.56
10 mg 0.010 0.014 0.030 0.060 0.10 0.5 0.4
5 mg 0.010 0.014 0.028 0.055 0.080 0.2  
2 mg 0.010 0.014 0.025 0.050 0.060 0.2  
1 mg 0.010 0.014 0.025 0.050 0.050 0.1  

(OIML) International Organization of Legal
Metrology Recommendation R111
E1
mg
E2
mg
F1
mg
F2
mg
M1
mg
M2
mg
M3
mg
2.5 7.5 25 75 250 750 2500
             
1.0 3.0 10 30 100 300 1000
0.5 1.5 5 15 50 150 500
0.25 0.75 2.5 7.5 25 75 250
             
0.1 0.30 1.0 3.0 10 30 100
0.05 0.15 0.5 1.5 5 15 50
0.030 0.10 0.30 1.0 3.0 10 30
             
0.025 0.080 0.25 0.8 2.5 8 25
0.020 0.060 0.20 0.6 2 6 20
0.015 0.050 0.15 0.5 1.5 5 15
             
0.012 0.040 0.12 0.4 1.2 4 12
0.010 0.030 0.10 0.3 1.0 3 10
0.008 0.025 0.08 0.25 0.80 2.5  
0.006 0.020 0.06 0.20 0.6 2  
0.005 0.015 0.05 0.15 0.5 1.5  
0.004 0.012 0.04 0.12 0.4    
0.003 0.010 0.03 0.10 0.30    
0.002 0.008 0.025 0.08 0.25    
0.002 0.006 0.020 0.06 0.20    
0.002 0.006 0.020 0.06 0.20    
0.002 0.006 0.020 0.06 0.20    

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