Introduction
NIMT is the national metrology institute established by National Metrology System Development Act., B.E. 2540 since June 1, 1998. NIMT is responsible for the establishment, maintenance and dissemination of the primary and national standards. The impedance laboratory is under the NIMT and it has the responsibility to maintain and disseminate the quantities of AC resistance, capacitance and inductance. The impedance laboratory supports calibrations and applications of impedance in electronics, communications, manufacturing, medical and other fields.
Calibration services
Staff
Dr. Monthol Homklintian
Metrologist , Senior Professional
Email : monthol@nimt.or.th
Tel. : 02-5775100 Ext.1224
Area of research/expertise
- Metrology and measurements of impedance measurement such as capacitance, inductance and ac resistance measurement
- Precision bridge such as transformer ratio bridge, auto balancing bridge, and Maxwell bridge
- Quantum impedance
- ISO/IEC 17025: General requirements for the competence of testing and calibration laboratories
- Technical assessor for ISO/IEC 17025 accreditation in area of electrical measurement.
- Quality control and measurement uncertainty
Dr. Chatchaval Kurupakorn
Metrologist , Senior Professional
Email : chatchaval@nimt.or.th
Tel. : 02-5775100 Ext.1253
Area of research/expertise
- Resistance Standard (Quantum Hall Resistance)
- High voltage, and high current metrology
- Partial Discharge
- Impedance measurement
Dr. Jutarat Tanarom
Metrologist , Professional
Email : jutarat@nimt.or.th
Tel. : 02-5775100 Ext.1234
Area of research/expertise
1. Quantum Metrology
- Single electron tunneling
- Josephson junction Voltage Standard
- DC&AC Quantum Hall Resistance Standard
- Quantum Impedance Standard
2. Electrical Measuring Instruments Calibration
- Voltage Measurement
- Current Measurement
- Resistance Measurement
- Impedance Measurement
Miss Jantarat Markchum
Research assistant
Email : jantaratm@nimt.or.th
Tel. : -
Area of research/expertise
- Impedance measurement
Related publications/articles
Selected publications
- Homklintian, M., H. Bothe, T. Funck, J. Melcher, and M.Schilling, “Refined model to calculate the frequency dependence of air capacitors for frequencies from 20 kHz to 1 MHz”, Conference on Precision Electromagnetic Measurements (CPEM 2010), Daejeon, Korea (South), IEEE, pp. 428 - 429, 2010.
- M. Homklintian, T. Funck, H. Bachmair, “Characterizing the impedance of the electrodes of a calculable cross capacitor by fourterminal measurement techniques”, Conference on Precision Electromagnetic Measurements (CPEM 2012), Washington DC, USA, pp. 390 – 391.
- M. Homklintian, Frequency Dependence of Primary Capacitance Standard in Audio Frequency Range, Mensch-und-Buch-Verlag, ISBN 386387207X, 2012.
- M. Homklintian, T. Funck, J. Melcher, H. Bachmair, “Calculated Frequency Behavior of the PTB Calculable Capacitor in Audio Frequency Range”, IEEE Trans. Instrumentation and Measurement 64(6), pp. 1600-1605, 2015.
- P. Moonmirat and M. Homklintian, “Characterizing the Impedance of the Parallel Plate Air Capacitors GR-1403 using Four-Terminal Measurement Technique”, EECON 38th, Thailand, pp. 333-336, 2015
- P. Moonmirat, M. Homklintian, C. Kumtawee, “Measurement of the Frequency Dependence of Standard Capacitors in the Frequency range 10 kHz to 1 MHz” Conference on Precision Electromagnetic Measurements (CPEM 2016), Ottawa, Canada,
- P. Gournay and M. Homklintian “Bilateral comparison of 10 pF and 100 pF standards (ongoing BIPM key comparisons BIPM.EM-K14.a and 14.b) between the NIMT (Thailand) and the BIPM” Metrologia, Volume 56, Number 1A
- M. Homklintian “Establishment of 4TP air capacitance standard for 1 pF, 10 pF, 100 pF and 1000 pF in the frequency range up to 30 MHz at NIMT” Conference on Precision Electromagnetic Measurements (CPEM 2020), Virtual conference, U.S.A,
- Chuttipong Tuma and Danai Phaoharuhansa, 2020, “Vibration Energy Harvest for Low Frequency using Double-piezoelectric Cantilever Beam”, MATEC Web of Conferences, Vol. 306, January 2020
- Chuttipong Tuma and Danai Phaoharuhansa, 2020, “Ocean Wave Energy Harvest Using Multipiezoelectric Cantilever Beams”, International Journal of Mechanical Engineering and Robotics Research, Vol. 9, No. 6, pp. 911-916, June 2020,