ASTM E126 Inspection, Calibration, and Verification of ASTM Hydrometers

The purpose of this ASTM E126-13a test method is to establish a common method by which manufacturers, calibration laboratories, and users of hydrometers are used to inspect, verify, or calibrate them. The objective is to provide a standard method that is simple, easily understood, and to produce reliable results.

  • Average 30% Cost
    Savings

  • 100% Confidentiality
    Guarantee

  • Free, No-obligation
    Consultation

  • 100% Customer
    Satisfaction

    TRUSTED BY ENGINEERS FROM

    Scope:

    ASTM E126 test method describes the principles, apparatus, and procedures for the inspection, calibration, and verification of ASTM glass hydrometers. This test method applies to ASTM hydrometers but can be used for other general hydrometers of the constant-mass, variable-displacement type.

    Test Procedure:

    In ASTM E126, the hydrometer (Figure 1) is carefully inspected for; cracks, fissures, deep scratches, rough areas, or other obvious damage to the glass. A hydrometer is rejected if any of these defects are present. The hydrometer is checked for strain in the glass, especially at the stem/body junction with the use of a polariscope. A hydrometer is rejected if any of these defects are present. It is particularly important for thermo hydrometers.

    The paper scale is inspected within the hydrometer stem. The paper scale is straight and without a twist. The linear dimensions and diameters are checked for compliance with specification requirements by comparing the hydrometer with the appropriate device.

    For ASTM E126, the hydrometer is calibrated at a minimum of three calibration points, spaced approximately equally across its range, nominally high, low, and mid-scale. For example, a hydrometer with a range of 9° to 21° API shall be calibrated at (approximately) 10, 15, and 20 API.

    Figure 1: A hydrometer

    Specimen size:

    Hydrometers

    Data

    The interval between graduations of density and relative density (specific gravity) hydrometers is smaller near the bottom of the scale. As per ASTM E126, the proper spacing shall be obtained from the following formula:

    l = L × d2/d× (d – d1)/ (d2 – d1)

    Where:

    l = distance from the top line to any line, d, between the top and the bottom,

    L = distance between the top and the bottom graduations of the scale,

    d2 = density value, or relative density (specific gravity), of the bottom line, and

    d1 = density value, or relative density (specific gravity), of the top line.

    Conclusion:

    ASTM E126 test method describes the principles, apparatus, and procedures for the inspection, calibration, and verification of ASTM glass hydrometers.

    OUR SERVICES

    Core Materials Testing Services

    Metrology

    A variety of microscopy and spectroscopy tools available for precise measurements from the nano to the meter scale.

    Metrology Testing Services POPULAR TESTS:

    TEM SIMS Profilometry

    Materials Testing

    ASTM and ISO standard and custom chemical, mechanical, thermal, corrosion tests, etc. for all materials metals, ceramic or polymers.

    Materials Testing Services POPULAR TESTS:

    Nondestructive Testing Electrical Testing Chemistry Analysis

    Product Testing

    Thousands of tests for product quality and reliability under heat, humidity, temperature shock, vibration, drop, electrostatic discharge.

    Product Testing Services POPULAR TESTS:

    Vibration Testing Humidity Testing Accelerated Aging

    Looking for Material Testing?

    We have already delivered 10000+ Material Test results to top companies

      Send us a request

        Process for testing
        •  
          STEP 01

          You share material and testing requirements with us

        •  
          STEP 02

          You ship your sample to us or arrange for us to pick it up.

        •  
          STEP 03

          We deliver the test report to your email.

          Let’s work together!

          Share your testing requirements with us and we will be happy to assist you.

          ddd Just share your testing requirements and leave the rest on us!
          • Free, no-obligation consultation
          • Guaranteed confidentiality
          • Quick turnaround time
          • Hassle-free process

            ddd

            Let us combine our capabilities to achieve success!!

              idea icon
              Want to connect with an expert before you leave?