Conveners
A8: Instrument I
- Chatchawal Wongchoosuk (Kasetsart University)
- Wiwat Wongkokua (Kasetsart University)
Nano fluids are engineered colloidal suspensions of nanoparticles in a base fluid. These nanoparticles are typically made of carbides or carbon nanotubes, metals, oxides and so on. Nanofluids are potential heat transfer fluids with enhanced thermo physical properties and heat transfer performance can be applied in many devices for better performances (i.e. energy, heat transfer and other...
The diameter measurement of sphere is very important in dimensional metrology. The measurement of diameter is generally carried out by a comparison method or direct method using 1D linear measuring system. The probes touch both sides of the workpiece and the diameter is determined from displacement of the probes. The contact force is generally operated at 1N which yield deformation due to...
The local gravity measurement using relative gravimeter was confirmed to the reference absolute gravity station by National Institute of Metrology (Thailand); NIMT. Five known absolute gravity value stations were used in this confirmation. By applying the A-B-A measurement pattern, the time dependent of the relative gravity value at the reference station was calculated. Then the short term...
The LVDT probe is a very important component used in gauge blocks calibration via a mechanical comparative method. The probe is used to determine the central length difference between a reference gauge block and gauge block under-tested (UTC). Typically, an UTC and a reference gauge block have the same nominal length. However, some gauge blocks UTC are specially made for specific purpose...
Surface finishing is an important process for manufacturing industries. Precise surface roughness measurement is crucial as it has a direct effect on surface quality. In Thailand, the National Institute of Metrology of Thailand (NIMT) provides reference roughness standards and roughness measuring instruments. NIMT also conduct Proficiency Testing (PT), which is an important process for...
The prototype of depth calibration standard machine was fabricated to calibrate the depth of indentation for elastomer hardness tester. According to ISO 18898, ASTM D2240 and ASTM D1415, the measurement of indentation depth by a measuring device comprising a length-measuring system shall be in reference with the pressure foot of the elastomer hardness tester. Nation Institute of Metrology...
Capacitively Coupled Contactless Conductivity Detection (C4D) technique for particle detection or flow cytometry has been increasingly interested. This detection technique in microfluidic system utilizes two electrodes, excitation and pick-up electrodes, which are not directly in contact with solution in microchannel. In this study, Particulate of different sizes suspended in DI water were...
