All researchCASE STUDY / 01 · Food safety · Microfluidics
PestiSafe 1.0 Microfluidic colorimetric pesticide sensing
A handheld pesticide screening platform integrating PDMS passive micromixing, a colorimetric assay, LED–photodiode detection, signal conditioning and IoT-ready instrumentation.
ColorimetryPDMSOptoelectronicsIoT
PestiSafe 1.0 · Research figure / project visual
0.20 ppmChlorpyrifos detection limit
100 µL/minMicrofluidic flow rate
IoTConnected analytical readout
01 / CHALLENGE
Why this work matters.
Field testing requires compact alternatives to centralized pesticide analysis and subjective visual color interpretation.
02 / APPROACH
How it works.
PDMS split-and-recombine and spiral mixers control fluid handling; an LED–photodiode reader and amplifier translate a colorimetric reaction into a digital signal.
03 / EXPERIMENTAL WORKFLOW
From concept to measurement
STEP 01
Sample and reagent preparation
STEP 02
Microfluidic delivery and passive mixing
STEP 03
Colorimetric reaction
STEP 04
Photodiode measurement
STEP 05
Embedded display and connected reporting
04 / RESEARCH CONTRIBUTION
Contribution & context.
Microfluidic design, optoelectronic integration, calibration and experimental evaluation.