Micro Quartz Tuning Fork-Based PM 2.5 Sensor for Personal Exposure Monitoring

Xingcai Qin, Xiaojun Xian, Yue Deng, Di Wang, Francis Tsow, Erica Forzani, Nongjian Tao

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


A portable, wireless, and cost-effective PM 2.5 sensor based on micro quartz tuning fork (MQTF) has been developed. Coated with repositionable polymer glue for effective absorption of PM 2.5 and with the help of innovative nozzle inlet, the MQTF-based sensor is highly sensitive to PM 2.5 in the detection range of 2∼ 2000μgm 3 with high stability. The sensor response, change rate of the MQTF frequency, shows linear relationship with PM 2.5 concentration from 6 to 100μgm 3 at the flowrate of 1.7 L/min, which is a typical range of PM 2.5 concentration in ambient air. By integrating the repositionable adhesive coated MQTF, driving and detection circuit, PM 2.5 filter, sampling system, and a smartphone with Bluetooth and home-developed app, the MQTF-based sensor is assembled for personal PM 2.5 exposure monitoring. Furthermore, field tests show that the PM 2.5 concentration readings from MQTF-based sensor and commercial PM monitor correlate very well with each other, which indicates the high accuracy and reliability of the MQTF-based sensor.

Original languageEnglish (US)
Article number8576635
Pages (from-to)2482-2489
Number of pages8
JournalIEEE Sensors Journal
Issue number7
StatePublished - Apr 1 2019


  • Air quality
  • PM sensor
  • micro quartz tuning fork
  • particulate matter
  • personal exposure monitor

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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