SmartNanotubes Smell INSPECTOR Manual de usuario

Document Version: 1.3.0; for Software Version: >= Desktop 1.5.0, iOS: 1.4.0, Android: 1.4.0

Document release date: March 2023

Technical Manual

Smell Inspector

 
 
 
 
©Smart Nanotubes Technologies GmbH 2023. All right reserved. 2 
 
Technical Manual 
 
 
 
Table of Contents 
Overview .................................................................................................. 5 
1 Purpose of the Manual............................................................................................................................. 5 
2 Getting Started.........................................................................................................................................5 
2.1 Step 1: Unpacking Your Smell Inspector ................................................................................................ 5 
1.2 Step 2: Installing the Smell Annotator ................................................................................................... 5 
1.3 Step 3: Connecting the Smell Inspector ................................................................................................. 5 
1.4 Step 4: Recording Smells........................................................................................................................ 5 
1.5 Step 5: Recognizing Smells..................................................................................................................... 5 
3 Product Overview..................................................................................................................................... 6 
3.1 Smell Inspector....................................................................................................................................... 6 
3.2 Smell Annotator ..................................................................................................................................... 7 
4 Device Control..........................................................................................................................................9 
4.1 Button Operation ................................................................................................................................... 9 
4.2 LED Readings.......................................................................................................................................... 9 
5 Terminology and Meanings .................................................................................................................... 10 
5.1 Smell / Substance Information............................................................................................................. 10 
5.2 Events................................................................................................................................................... 10 
5.3 Local (Offline measurements).............................................................................................................. 11 
5.4 Cloud (Online measurements) ............................................................................................................. 11 
Smell Inspector ........................................................................................12 
1 Modes of Operation ............................................................................................................................... 12 
1.1 USB Operating Mode ........................................................................................................................... 12 
1.2 Bluetooth Operating Mode
 ............................................................................................................... 12 
1.3 Power Saving Mode
 ......................................................................................................................... 12 
2 Things to Keep in Mind........................................................................................................................... 12 
2.1 Smell Inspector Overview .................................................................................................................... 13 
2.2 Smell Inspector Operation ................................................................................................................... 13 
2.3 Detectable Gases and Smells ............................................................................................................... 13 
2.4 Gas Detector Sensitivity ....................................................................................................................... 13 
2.5 Detector Replacement ......................................................................................................................... 13 
2.6 Detector Cleaning ................................................................................................................................ 13 
2.7 Smell Inspector Training....................................................................................................................... 13 
Process Steps...........................................................................................14 
1 Setup an Account ................................................................................................................................... 14 
2 Connection to Smell Annotator App ....................................................................................................... 14 
3 Smell Measurement for Annotation ....................................................................................................... 15 
3.1 Step 1: Start New Smell Measurement ................................................................................................ 15 
3.2 Step 2: Add Measurement Information ............................................................................................... 17 
3.3 Step 3: Stop and Save Measurement ................................................................................................... 17 
3.4 Step 4: View saved measurement in the Measurement List................................................................ 18 
4 Recognize Smell Measurement............................................................................................................... 18 
4.1 Step1: Start Recognize Smell Measurement ........................................................................................ 19 

 
 
 
 
©Smart Nanotubes Technologies GmbH 2023. All right reserved. 3 
 
Technical Manual 
 
 
 
4.2 Step 2: Select ML Model ...................................................................................................................... 19 
4.4 Step 4: Measurement Started –Initial Stabilization ............................................................................ 21 
4.5 Step 5: Expose Device to Smell/ Substance.......................................................................................... 21 
4.6 Step 6: Expose Device to Smell/ Substance.......................................................................................... 22 
4.7 Step 7: End Exposure............................................................................................................................ 23 
4.8 Step 8: Correct Event name for better reference ................................................................................ 24 
4.9 Step 9: Stop Measurement .................................................................................................................. 24 
4.10 Step 10: Save Measurement .............................................................................................................. 25 
4.11 Step 11: Measurement saved Successfully!....................................................................................... 28 
5 Reset Base Level..................................................................................................................................... 29 
6 Export Measurement.............................................................................................................................. 29 
7 View the Feature Graph.......................................................................................................................... 30 
8 Measurement Analysis ........................................................................................................................... 30 
8.1 Step 1: In Home Screen, Select “Analysis” .......................................................................................... 30 
8.1 Step 1: Select Measurements to Analysis ............................................................................................ 31 
8.3 Step 3: Click on ‘Get Analysis’ .............................................................................................................. 32 
FAQs ........................................................................................................36 
1 Account .................................................................................................................................................. 36 
1.1 I lost my password. Need help resetting it. ......................................................................................... 36 
2 Smell Annotator ..................................................................................................................................... 36 
2.1 Can I Use Smell Annotator without SignIn? ......................................................................................... 36 
2.2 Is the Smell Annotator software compatible with all platforms? ........................................................ 36 
3 Smell Inspector....................................................................................................................................... 36 
3.1 Why is the USB connection not working?............................................................................................ 36 
3.2 How do I connect the Smell Inspector to the Smell Annotator?.......................................................... 36 
3.3 The Bluetooth connection is working, but only when the device is connected through USB. ............ 36 
3.4 Device cannot be turned on, what can be a problem?........................................................................ 36 
3.5 Can I use the Smell Inspector with Smell Annotator without a USB connection? ............................... 36 
3.6 Where can I update the Smell Inspector firmware? ............................................................................ 36 
3.7 Do the different devices react to the smell in the same way?............................................................. 36 
3.8 How should the Smell Inspector device be handled during the measurement? ................................. 37 
4 Measurement......................................................................................................................................... 37 
4.1 How to take Measurement? ................................................................................................................ 37 
4.2 What are the temperature and humidity values in the graph? ........................................................... 37 
4.3 Is it possible to see all the channels in visualization? .......................................................................... 37 
4.4 What are the three states of the measurement? ................................................................................ 37 
4.5 What is the event in the measurement? ............................................................................................. 38 
4.6 Can I measure multiple smell measurements one by one without having a delay? ........................... 38 
4.7 Is there any best practice to do the measurement?............................................................................ 38 
4.8 About measurement drifts in the measurement, Is it normal? ........................................................... 38 
4.9 What do I expect as a response in the measurement graph from the smell measurement?.............. 38 
4.10 What if the measurement environment changed during the measurement? .................................. 38 
4.11 Can other Smells or changing smell environment can affect the actual measurement? .................. 38 
4.12 Is it possible for two measurements of the same smell substance to have varied graph responses?
 ............................................................................................................................................................. 39 
5 Recognize Smell...................................................................................................................................... 39 
5.1 The 'Recognize Smell Line' is appearing in the plot panel with a delay. What could be the reason?.. 39 
5.2 Which smells can I recognize with Smell Inspector?............................................................................ 39 
6 Detectors................................................................................................................................................ 39 

Technical Manual

Note: data and description in this document are subject to change without notice. Product photo and pictures may differ

from real product appearance.

4.6.1 Is there a list of which sensors measure what, such as nitrogen dioxide? .......................................... 39

4.6.2 I have some Detector channels that always return 1126.2, are they broken or is the gas not present?

............................................................................................................................................................. 39

4.6.3 Does the sensor return a default value if it doesn't measure anything?............................................. 39

4.7 Other...................................................................................................................................................... 39

4.7.1 Where can I find the privacy policies and the terms of use?............................................................... 39

4.7.2 How can I get in touch with IT-Support?.............................................................................................. 39

4.7.3 Can we access raw measurements collected by other users or internal SNT measurements?........... 39

4.7.4 Can you tell me how you use AI and what approach you take, or is that a trade secret?................... 39

5. Operating the Smell Inspector without the Smell Annotator....................41

5.1 USB Measurements................................................................................................................................ 41

5.2 Bluetooth Measurements....................................................................................................................... 42

6. Insights of the Measurement ...................................................................43

Technical Manual

1. Overview

1.1 Purpose of the Manual

The purpose of this manual is to provide technical information about the Smell Inspector and to guide

users through the process of using it effectively. The manual is designed for individuals with different

backgrounds and levels of expertise, from developers and scientists to tinkerers. It covers everything

from an overview of the Smell Inspector's features to the specific steps for training it to detect and

distinguish specific smells. Additionally, the manual provides information about the sensitivity and

performance of the Smell Inspector's detectors, as well as details on replacing or maintaining them.

Overall, the manual aims to empower users to fully utilize the capabilities of the Smell Inspector and

make the most of their experience with this innovative and powerful tool.

1.2 Getting Started

Welcome to the world of electronic olfaction! The Smell Inspector is an advanced tool designed to

detect and distinguish specific smells. Whether you are a developer, scientist, or just a curious

tinkerer, the Smell Inspector is the perfect tool for anyone working on smart systems. In this manual,

you will learn how to get started with the Smell Inspector and start detecting different smells.

1.2.1 Step 1: Unpacking Your Smell Inspector

Upon receiving your Smell Inspector, carefully unpack all the components from the box. Make sure

that you have received the following components:

•Smell Inspector

•Smell Annotator software platform

•USB cable for connecting to a computer

1.1.2 Step 2: Installing the Smell Annotator

The Smell Annotator is a software platform that allows you to control, annotate and store

measurements of the Smell Inspector, as well as recognize annotated smells. To install the Smell

Annotator, simply follow the instructions provided in the software platform.

1.1.3 Step 3: Connecting the Smell Inspector

Connect the Smell Inspector to your computer using the USB cable. Once connected, the Smell

Annotator will automatically recognize the Smell Inspector and you are ready to start using the Smell

Inspector.

1.1.4 Step 4: Recording Smells

The Smell Annotator software platform allows you to record smells and annotate them. To record a

smell, simply open the Smell Annotator and select the "Take a New Smell Measurement" option.

Then, point the Smell Inspector towards the source of the smell, and the Smell Annotator will start

recording the smell measurement. Once the measurement is complete, annotate the smell by

providing a name and description.

1.1.5 Step 5: Recognizing Smells

The Smell Annotator software platform comes with pre-trained machine learning models that you

can use to recognize annotated smells. To recognize a smell, simply select the "Recognize Smell"

option in the Smell Annotator, select a ML Model, point the Smell Inspector towards the source of

the smell, and the Smell Annotator will use the pre-trained models to recognize the smell.

Technical Manual

That's it! You are now ready to start detecting smells with the Smell Inspector. If you have any

questions or need further assistance, please consult the manual, or reach out to the support team.

Enjoy your journey to the world of electronic olfaction!

1.3 Product Overview

This section provides an overview of the Smell Inspector, including its features, capabilities, and the

ways it can be used. The Smell Inspector is a developer kit and ready-to-use device in one, designed

for anyone working on smart systems, including developers, scientists, and tinkerers. The device

generates digital scent fingerprints and be trained to detect and distinguish specific smells. The Smell

Inspector contains four Smell iX16 chips and humidity and temperature sensors and can detect a wide

range of gases and smells, depending on their concentration at the measurement spot.

1.3.1 Smell Inspector

The Smell Inspector is a developer kit. It is suitable for testing and

exploring different smell-related applications in the fields of product

quality, safety & security, life & care, air quality, and many others. It

can be connected to a PC, tablet, or smartphone, and can be operated

with Smell Annotator software.

WARNING

Usage limitations:

-not for person safety applications

-not water resistant, should not be used in water or other liquids

-not for harsh or explosive gas conditions

Installing the batteries: in order to use Smell Inspector without USB cable open the device housing, place

the new batteries (AAA, not included) into the battery compartment, notice the correct battery polarity

as depicted on the compartment when inserting. Never leave a weak or dead battery in Smell Inspector.

Even a leakproof battery can leak damaging chemicals. When you are not going to use Smell Inspector

for a week or more, remove the batteries. Please dispose of old batteries at a council collection point

or return them to a local shop at no cost. The disposal of domestic refuse is strictly forbidden according

to the Battery Regulations.

Figure 1. Smell Inspector device

Technical Manual

1.3.2 Smell Annotator

The Smell Annotator app is a part of the electronic nose developer kit Smell Inspector. The Smell

Annotator gives you access to the data from the temperature, humidity, and smell sensors of your Smell

Inspector device.

The Smell Annotator is an application to view, annotate, and store smell measurements from the Smell

Inspector. Software is supported in Mobile (Android and iOS) and Desktop (Windows) devices.

To download the Smell Annotator software please visit, http://smart-nanotubes.com/downloads/.

System Requirement

•For Desktop App

Please Make sure that your computer meets or exceeds the following system requirements before

installing the Smell Annotator application.

From the desktop app version >= 1.1.1, no need to perform driver installation manually.

For the desktop app version < 1.1.1.

Before you start the program, please first install the sensor drivers (see below).

Processer

Intel Core / AMD CPU

RAM

4 GB

Available Disk Space

800 MB

Windows 10 and 11 supported

Figure 2. Smell Annotator download QR Code

Scan Me

Technical Manual

Download the appropriate version from

the Download driver.

(1) Go to the Downloads tab and

download the Windows version

of the driver (CP210x Windows

Drivers).

(2) Unpack the zip file where you

want to use the program.

(3) Install the VC redistributable package

by running

"CP210xVCPInstaller_x64.exe" in the

extracted directory.

(4) Finally, double-click "Smell

Annotator.exe" in the directory to

run the program.

•For Android Device: V6.0 and above

•For iOS Device: V11.0 and above

Figure 3 Installation of window-driver

Technical Manual

1.4 Device Control

You can enable power saving mode anytime by

pressing the power button for a long period

(more than 4 seconds). Once the Smell

Inspector is in power saving mode, you need to

press the POWER button again for a long

duration of time to bring it back into normal

operating mode. To connect Smell Inspector to

your mobile device via Bluetooth press the Fn

button for a long period. To put a timestamp for

an event on the measurements shortly press

the POWER button (less than 2 seconds).

The Smell Inspector operating mode is

visualized with two LEDs. Both the blue and red

LED will be off in power-saving mode and the

connection of the Smell Inspector to the other

devices will be terminated.

Device control:

•Buttons: used for device operation

•LED: device status and button

functions

•

USB Port: USB Micro-B port for power and communication

1.4.1 Button Operation

1.4.2 LED Readings

Device Button

Press

Meaning

Power

long-press (>4 sec.)

Sleeping mode ON/OFF

short press (<2 sec. in-running measurement)

Add Event timestamp

Function

long-press (>4 sec.)

Bluetooth pairing mode enable /

Bluetooth turn-off

Reset

short press

Resetting the device

Table 1. Button Operation

LED

State

Meaning

OFF

Powered Off / Power Saving Mode

Continues RED

USB operating Mode

Blinking BLUE

Bluetooth pairing mode

Continues BLUE

Device Connected via Bluetooth

Table 2. LED Readings

Figure 3 Smell Inspector Overview

Function

Reset

Power

LED

USB-Port

Technical Manual

1.5 Terminology and Meanings

For the correct work of ML algorithms used for smell recognition, the new smell measurements should

be collected and properly annotated. To a proper annotation of new measurements belongs the

information about the measured smell or substance (it must be the same for the same substance/smell)

and the information on events (start and end of exposure) during the measurement. In general,

measurement is divided into three states: first stabilization in a usual condition before exposure, the

exposure with the target smell/gas, and recovery and stabilization after the end of exposure.

1.5.1 Smell / Substance Information

Information on the smell and the measurement conditions

Please always provide information on the smell or substance you measure. If the same smell is measured

in different conditions, this variability can be also included here. All this information will be used for ML

algorithms, so for the same smells and the same conditions, the same annotation must be used for all

repeating measurements.

1.5.2 Events

Event is the change of the measurement state.

A short smell/gas measurement is usually divided into three states. First, you begin the measurement

when the device is exposed to a normal environment free of smell or substances. Once the detectors

are stabilized in the current environment, the next measurement state will be when the detectors are

exposed to the target smell or substance. The moment when the previous state "stabilization" is

affected by exposing a smell or substance is referred to as an "Event", you may name it "Start of

exposure".

The third state is when exposing the device to the smell is terminated, i.e., the Smell Inspector device is

taken away from the smell or the substance, smell or gas source is removed from the Smell Inspector.

This moment is referred to as an "Event" as well and can be named as "End of exposure". When the

device is no longer exposed to a smell or substance and is in the same environment as before the

exposure, the detectors are in a recovery mode. Depending on the smell or substance being exposed to,

the recovery time may take from a minute to several minutes and in some cases up to an hour to return

Name

Meaning

Take a New Smell Measurement

measurement for smell/gas digitization and annotation

Recognize Smell

measurement for smell recognition with AI algorithms

Measurement

capturing and digitalization of a smell

Smell/Substance

It is the actual Smell or Substance (gas, vapor, or smelly

substance) that is being measured in the measurement

Use Case

It is the specific goal for which the measurement is being

taken (e.g., kitchen, production, WC, etc.)

Event

The event is a change in the measurement state (start of

exposure, end of exposure)

Measurement Setup

Short description of a setup or environment in which the

measurement is taken

Local (Measurements)

Incomplete offline measurements which must be saved

later adding all relevant Smell/Substance information

when connected to internet

Cloud (Measurements)

Complete measurements saved in the cloud

Table 3. Terminology

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