ASTM Class 1 Calibration Weights

View more products from Ohaus
ASTM Class 1 Calibration Weights


ASTM Class 1 Calibration Weights

Features and specsAsk A QuestionUPS Shipping
Priced From: $63.00 

You Save $7.00 (10%)


ASTM Class 1 Calibration Weights

These weights do not include NIST NVLAP Certificates.
1mg
2mg
5mg
10mg
20mg
1mg
2mg
5mg
10mg
20mg
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
SKU:80781101
SKU:80781103
SKU:80781107
SKU:80781109
SKU:80781111
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Quantity:   
Quantity:   
Quantity:   
Quantity:   
Quantity:   
50mg
100mg
200mg
1g
2g
50mg
100mg
200mg
1g
2g
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
SKU:80781115
SKU:80781117
SKU:80781119
SKU:80781125
SKU:80781127
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Quantity:   
Quantity:   
Quantity:   
Quantity:   
Quantity:   
5g
10g
20g
50g
100g
5g
10g
20g
50g
100g
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
SKU:80781131
SKU:80781133
SKU:80781135
SKU:80781139
SKU:80781141
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Our Price:  $70.00
 Now: $63.00 
Our Price:  $80.00
 Now: $72.00 
Our Price:  $97.00
 Now: $87.30 
Quantity:   
Quantity:   
Quantity:   
Quantity:   
Quantity:   
200g
20g With Box
40g With Box
50g With Box
100g With Box
200g
20g With Box
40g With Box
50g With Box
100g With Box
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
SKU:80781143
SKU:49024-11
SKU:49044-11
SKU:49054-11
SKU:49015-11
Our Price:  $155.00
 Now: $139.50 
Our Price:  $66.00
 Now: $59.40 
Our Price:  $66.00
 Now: $59.40 
Our Price:  $66.00
 Now: $59.40 
Our Price:  $76.00
 Now: $68.40 
Quantity:   
Quantity:   
Quantity:   
Quantity:   
Quantity:   
200g With Box
400g With Box
500g With Box
1kg With Box
2kg With Box
200g With Box
400g With Box
500g With Box
1kg With Box
2kg With Box
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
In Stock: 
Yes
SKU:49025-11
SKU:49045-11
SKU:49055-11
SKU:49016-11
SKU:49026-11
Our Price:  $89.00
 Now: $80.10 
Our Price:  $119.00
 Now: $107.10 
Our Price:  $121.00
 Now: $108.90 
Our Price:  $149.00
 Now: $134.10 
Our Price:  $185.00
 Now: $166.50 
Quantity:   
Quantity:   
Quantity:   
Quantity:   
Quantity:   
4kg With Box
4kg With Box
In Stock: 
Yes
SKU:49046-11
Our Price:  $351.00
 Now: $315.90 
Quantity:   
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. 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    

Reviews of the ASTM Class 1 Calibration Weights

There are no reviews for this product. CLICK HERE to be the first one to share your opinion!
Scale Manufacturers
Subtotal: $0.00
D&B