What is E2 Class Weight Box?

In today’s rapidly evolving technological landscape, the precision of measurement tools, particularly weighing balances, has become more crucial than ever. With an array of weighing balances flood the market – from Micro Balances and Semi-Micro Balances to Analytical Balances, Precision Balances, and Ultra Micro Balances – each differing in technology, capacity, and readability. It raises a crucial question: how can the reliability and accuracy of these balances be ensured after being used multiple times? This is where the pivotal role of Standard Weights, such as the E2 Class Weight Box, comes into play, guaranteeing the accuracy, calibration, and optimal performance of weighing balances.


Understanding the Necessity of Standard Weights
Standard Weights serve an indispensable purpose in the realm of precise measurements by calibrating weighing balances, thus maintaining their accuracy and ensuring they are in optimal functional condition. Calibration with standard weights is a fundamental process that counters any discrepancies or drifts in readings that might occur over time or with frequent usage, thus ensuring reliability.


The Stratification of Standard Weights
Like the variety of weighing balances, there exists a spectrum of Standard Weight classes designed to calibrate balances with varying degrees of accuracy. These classes range from E1, E2, F1, F2, to M1. The selection of the appropriate class of standard weight hinges on the specific balance requiring calibration, dictating the requisite accuracy and precision level.

What is E2 Class Weight Box?
E2 Class Weight Box is used for Calibrating Weighing Balances with high readability values such as Micro and Semi Micro Balances.

E2 class weight boxes deliver absolute precision when it comes to weighing an unknown mass, offering high readability when compared to scales. E2 class weights are supplied in a robust and easy-to-clean plastic container, with protective materials, including foam inserts, making them a durable solution.


The E2 Class Weight Box comprises a meticulously curated set of weights, ranging from 1 mg to 200 g, encompassing a total of 23 individual weights. This assortment includes fractional weights (1 mg to 500 mg, totaling 12 pieces) and knob-type cylindrical weights (1 g to 200 g, accounting for 11 pieces). Moreover, these weights are distinctively shaped to denote different denominations:
  1. Triangle for 1 mg, 10 mg, 100 mg
  2. Square for 2 mg, 20 mg, 200 mg
  3. Pentagon for 5 mg, 50 mg, 500 mg
  4. Cylindrical Knob Type for 1 g to 200 g


Such distinctions facilitate ease of identification and contribute to the weight box's pragmatic utility and operational efficacy.

The Uniqueness of E2 Class Weight Box
Distinguished by its designated function as defined in OIML R111 - 1 (E) Edition 2004, the E2 Class Weight Box is primed for the verification or calibration of class F1 weights and for usage with high-precision weighing instruments of special accuracy class I.

This entails that E2 Class Weights are inherently master instruments for calibration purposes and necessitate an accompanying valid Calibration Certificate. Primarily, these weights are instrumental in calibrating Semi Micro Balances and Analytical Balances, which are generally categorized as Class-I Balances due to their extreme precision (0.01 mg and 0.1 mg readability, respectively).

Broader Implications for Calibration
Beyond the calibration of Semi-Micro and Analytical Balances, the E2 Class Weight Box is pivotal as a Reference Standard or Master Equipment. It facilitates the calibration of lower class weights, such as F2 and M1 classes. This versatility underscores the E2 Class Weight Box's critical importance in maintaining the measurement accuracy and reliability hierarchy across various classes of weights and balances.

In the meticulous world of measurements, the E2 Class Weight Box emerges as an indispensable tool for ensuring the precise calibration and optimal performance of high-accuracy weighing balances. It embodies the rigorous standards set forth by OIML R111 - 1 (E) Edition 2004, facilitating a standardized approach to calibration that underpins the reliability and accuracy of weight measurements across industries. Thus, the E2 Class Weight Box stands as a cornerstone in the quest for precision, accuracy, and reliability in weighing technologies.

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