22th Oct 2017

## Device Prototype

• A open hardare has been developed using which will make real time monitoring of water quality possible

• This device uses drop-down kinetics of spions (iron nanoparticles) in presence and absence of magnetic field.

## The design objective :IOT based Universal Water Sensor

• We propose to develop a low-cost universal hardware for acquisition data from low level sensor/transducer that sends it to cloud
• Stand-alone memory for time series representation, data analytics, data visualization and final element control. will be also provided

## What the device would perform

• This device is ready to sense data from chemical , bio-chemical substance and the device can be connected with Wify, acquire data, decision making based on this data
• While water is the present target the application can be extrapolated to other fields.

## Code

fname<-"Bacteria_SPION.csv"
z<-read.csv(fname)
y<-z$magminus ym<- z$magplus
y<-y[!is.na(y)]
ym<-ym[!is.na(ym)]
x<-seq(1,length(y),1)
xm<-seq(1,length(ym),1)

ik<-which(x>200 & x<550)
ikm<-which(xm>200 & xm<550)
y<-y[ik]
x<-x[ik]
ym<-ym[ikm]
xm<-xm[ikm]
#y<-(y-min(y))/(max(y)-min(y))
#ym<-(ym-min(ym))/(max(ym)-min(ym))
par(mfrow=c(1,2))
plot(x,log(y/y[1]),col="green",type="l",xlab="",ylab="")
points(xm,log(ym/ym[1]),col="red",type="l",xlab="",ylab="")
title(main=" SPION Drop Down \nDynamics(+/-) Field\n RED +,GREEN -",xlab="sec",ylab="scattering AU")

## Implications of the result

• The data clearly shows that the field increases the scattering
• In this case spion is attacting the bacteria and more so in presence of field.

## Broader designs

The method can in principle make measurements - Electrical
- Capacitance (Voltage, Conductance)
- Optical (Optical Density,Color,Fluoresence,Raman Signals)
- Magnetic (Magnetic Field Intensity)

## Hardware

Specification of Device: - Power consumption ≈ Very Low (50 mW)
- Can be connected with Sensor/ FCE(Final Control Element)
- Interface with Device : Through USB Cable
- ADC resolution ( 10 bits – 16 bits)
- Mode of communication: wi-fi
- Data Sampling Rate: 1 samples/ seconds (Online) - Upto 100 samples/ seconds(Offline) - Fully Customizable - Can be delivered with a low cost and small in size - Power Option: From USB/ SMPS/ Non Conventional Energy (Solar)