TY - GEN
T1 - Ultra-Long-Life Miniature pH Sensor with a SMA Valve-Actuator Integrated Liquid Junction for Rumen Monitoring
AU - Higuchi, Shogo
AU - Takamatsu, Seiichi
AU - Itoh, Toshihiro
N1 - Publisher Copyright: © 2019 IEEE.
PY - 2019/6
Y1 - 2019/6
N2 - We successfully demonstrated an ultra-long-life miniature pH sensor that employed a newly-developed Ag/AgCl reference electrode (RE) with a valve-actuator-integrated liquid junction. Because previous studies reported that the short life span of REs is caused by an outflow of internal electrolyte, we introduced a valve actuator to reduce the outflow. The results of our study indicated that potential was measured for 24 h with a 0.47-mV drift and the life was estimated to be 2.3 years, which is significantly longer than that of conventional REs. By applying this technique to a miniature pH sensor, the innovative performance, in terms of accuracy (pH error ≤0.1) and life expectancy (more than two years), could be estimated.
AB - We successfully demonstrated an ultra-long-life miniature pH sensor that employed a newly-developed Ag/AgCl reference electrode (RE) with a valve-actuator-integrated liquid junction. Because previous studies reported that the short life span of REs is caused by an outflow of internal electrolyte, we introduced a valve actuator to reduce the outflow. The results of our study indicated that potential was measured for 24 h with a 0.47-mV drift and the life was estimated to be 2.3 years, which is significantly longer than that of conventional REs. By applying this technique to a miniature pH sensor, the innovative performance, in terms of accuracy (pH error ≤0.1) and life expectancy (more than two years), could be estimated.
KW - Liquid junction
KW - Reference electrode
KW - Shape memory alloy actuator
KW - pH sensor
UR - https://www.scopus.com/pages/publications/85071941451
U2 - 10.1109/TRANSDUCERS.2019.8808461
DO - 10.1109/TRANSDUCERS.2019.8808461
M3 - Conference contribution
T3 - 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems and Eurosensors XXXIII, TRANSDUCERS 2019 and EUROSENSORS XXXIII
SP - 1411
EP - 1414
BT - 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems and Eurosensors XXXIII, TRANSDUCERS 2019 and EUROSENSORS XXXIII
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 20th International Conference on Solid-State Sensors, Actuators and Microsystems and Eurosensors XXXIII, TRANSDUCERS 2019 and EUROSENSORS XXXIII
Y2 - 23 June 2019 through 27 June 2019
ER -