Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Pendidikan Fisika dan Teknologi
Juniarti, Rosita
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Computer Science & IT Education Physics Public Health

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Pengukuran Konsentrasi Coarse Particle di Ruangan dengan Sistem Kontrol Temperatur Udara Budianto, Arif; Juniarti, Rosita; Wirawan, Rahadi; Rahayu, Susi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 2 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i2.595

Abstract

Particulate matter is an air emission that is compossed of particle and liqud dropplet. This suspension is easily measured in several size distributions: ultrafine particle, fine particle, coarse particle, and total suspended particle. Coarse particle is commonly used as a parameter of air quality index. This research aims to measure coarse particle concentrations inside an air-conditioned room. The measurement was conducted using a particulate sensor and a microcontroller for an hour. All measurements were varied into: active and non active room conditions. The results show that human activities and movements in the first variation has higher concentration than the second one. The difference is about 12 µg/m3. human activities have a significant role in the submicron particulate distribution inside a room. Air-conditioned room has higher concentration than a common room.
A Development of a Coarse Particle Concentration Measurement System Using a Crystal-Based Sensor and a Dust Sensor for Air Quality Measurement Budianto, Arif; Rahayu, Susi; Mardiana, Laili; Ridho Illahi, Ramadian; Juniarti, Rosita
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 10 No 1 (2024): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v10i1.6692

Abstract

QCM or quartz crystal microbalance is a non static crystal that can be used as a mass sensor. As a piezoelectric crystal, a QCM generates an electrical signal with a specific frequency. The frequency change can be utilized as a frequency counter in a mass measurement system. This study aims to develop a coarse particle sensor system using a QCM and an oscillator circuit. In line with this, this study uses an oscillator circuit and a QCM for a sensor development. Thus, the frequency measurement of the QCM contains an oscillator and a signal conditioner connected to a microcontroller. For this purpose, an Arduino Nano was used as the signal processing, while a QCM was used as a coarse particle sensor and compared to a digital dust sensor (Winsen ZH03). The sensor system was evaluated using a fixed-type crystal connected to an oscillator: 2.5 MHz - 7.2 MHz. Arduino Nano processed the frequency signal generated by the developed oscillator. The results show that the sensor system has a stable output signal compared to the comparator. There is a linear correlation between the frequency measured by the system and the oscilloscope (99.73%). It can be concluded that the sensor system can measure coarse particle concentrations from 32-620 ug/cm3 (frequencies from 2 MHz to 7.2 MHz) with a response time of 1 second. The system has an accuracy of 99% and a resolution of 1 Hz.
Co-Authors Arif Budianto Mardiana, Laili Ramadian Ridho Illahi Susi Rahayu Wirawan, Rahadi