As part of the process of balloting the reapproval of the D323-08 method on the ASTM D02 (14-02) ballot, a negative vote had been received that was subsequently withdrawn on the condition that the subcommittee follow-up with a revision to the method to address the negative voters concerns. In short, the negative voter had stated that one of the goals of the ASTM Mercury Removal Initiative, administered by Committee E20 on Temperature Measurement, is to phase out the use of mercury thermometers. The D323-08 method version requires the use of Thermometer 18C, a mercury thermometer, in Section A1.5. A non-mercury glass thermometer approved by ASTM as an alternative to 18C is currently listed as Thermometer S18C in Specification E2251. In addition, alternative thermometers such as RTDs, thermistors and thermocouples are available as replacements that can provide equal or better accuracy. As such, the negative voter had recommended revising Section A1.5 to allow usage of alternative non-mercury thermometric devices, thereby encouraging the phase out of mercury thermometer usage. The proposed revision to A1.5 adds the additional statement that the negative voter provided to address the issue.
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