5. Introduction
Develop a touchless sanitizer dispenser for improved
hygiene in public and healthcare settings.
Key Features
Touchless Operation: Infrared sensor for automatic
dispensing.
Refill Alerts: Low-level sensor notifies when
sanitizer is running low.
Hygiene Boost: Reduces cross-contamination risks.
Significance
Enhances hygiene protocols in high-traffic areas,
addressing global health needs during pandemics.
Problem Client’s
Statement
Issues with Manual Dispensers:
High contamination risks.
No alerts for low sanitizer levels.
Solution: A smart, touch-free system with
refill notifications.
6. Literature Review: Key Findings
Touchless Dispensers: Eliminate contamination risks and promote higher usage in
public spaces.
Infrared Sensors: Ensure quick and accurate sanitizer dispensing in all conditions.
Refill Alerts: Low-level sensors and IoT systems improve maintenance and uptime.
User Preference: Touchless systems are more frequently used and encourage
better hygiene.
Technology Integration: Ultrasonic sensors and microcontrollers enable precise
operation and refill management.
7. Revised Problem Statement
Challenges with Manual Dispensers
Require physical contact, increasing the risk of cross-contamination.
Frequently run out of sanitizer unnoticed, disrupting hygiene protocols.
The Need for Touchless Sanitizer Dispensers in Public Spaces
Proposed Solution
Touchless Dispenser Features:
Equipped with infrared sensors for hands-free operation.
Includes a refill alert system for uninterrupted use.
Designed to be compact, durable, and user-friendly.
Benefits
Enhanced Hygiene: Reduces germ transmission in critical areas like
hospitals, offices, and schools.
Affordable and Reliable: Costs under 600 SR with high-quality materials
ensuring durability.
8. Initial Design Attribute
Key Design Features
Touchless Operation: Infrared
sensors enable automatic dispensing for
hygiene and ease of use.
Low-Level Refill Notification: Alerts
users when the sanitizer needs refilling
for uninterrupted operation.
Durability: Built with anti-corrosion
materials to withstand heavy public use.
Safety: Non-toxic materials and cross-
contamination prevention meet hygiene
standards.
Cost-Efficiency: Designed for low
manufacturing and operational costs.
Objectives
Marketable:
1. Cost-Effective: Affordable for mass
production.
2. Attractive Design: Compact, modern
appearance for diverse public spaces.
3. Durable: Built for long-term use.
4. User-Friendly: Accessible for all age groups
with an automatic interface.
Secure:
5. Touchless: Eliminates contact points to
reduce contamination risks.
6. Health-Friendly: Ensures safe materials
and operations.
Environmentally Conscious:
7. Recyclable Materials: Promotes
sustainability.
8. Energy Efficient: Minimizes power
9. Objective
Tree
NO. Objectives
1 Touchless Operation
1.1 Use infrared sensor technology for hand detection without physical
contact.
2 User-Friendly Design
2.1 Easy to use for all age groups.
2.2 Clear refill indicators (LED notifications).
3 Durability
3.1 Long-lasting components (e.g., high-quality pump and sensors).
3.2 Resistant to daily wear and tear in high-traffic environments.
4 Safety and Hygiene
4.1 Must meet hygiene standards (no direct contact).
4.2 Safe for frequent use (non-hazardous materials).
5 Compact and Portable Design
5.1 Small enough to be installed in various locations (compact dimensions).
6 Cost Effective
11. Realistic constrains
Cost: Total material and
assembly costs must not
exceed 600 SAR.
• Dimensions: 30cm x 30cm x 50cm.
≤
• Weight: 5 kilograms.
≤
• Ensures easy installation and maintenance in public areas.
Size: Compact and
Lightweight:
• Battery-operated or AC adapter compatible.
• Designed for long-term use in off-grid or low-power conditions.
Energy Efficiency: Operates on
low power:
• Withstands frequent disinfection.
• Suitable for high-use environments like hospitals and schools.
Materials: Non-Corrosive and
Durable:
• Bacteria-resistant.
• Prevent cross-contamination between users.
Hygiene Standards: Materials
and design:
Safety: Compliant with
hygienic requirements for
public use.
12. Black Box
Hand Presence
Monitor Sanitizer Levels
Automatic Hand
Sanitizer
Dispenser with
Infrared Sensor
Hand Removal
Dispense Premeasured
Amount of Sanitizer
No Access Sanitizer
Dispensed
Visual Notification for
Refilling
13. Glass Box
Hand Presence
Monitor Sanitizer Levels
Sanitizer
Activated
Sensor Detect
Low Level
Electrical Power
(AC or DC)
IR Sensors Detect
Hand
Sanitizer Reaches
Threshold
Signal to
Microcontroller
Trigger Refill
Notification
Alert (LED)
Hand Removal
Dispense Premeasured
Amount of Sanitizer
IR Sensor Detect No
Hand
Microcontroller
Stops Mechanism
No Access Sanitizer
Dispensed
Visual Notification for
Refilling
14. Function Means Tree
Provide Hygienic &
Efficient Hand
Sanitizing Solution
Infrared
Sensor
Functions Means
Microcontroller
Controlled Pump
Low Level
Sensor
Durable, Non-corrosive
Materials, Easy Cleaning &
Maintenance, Ergonomic
Design
Electrical
Power (AC
or DC)
LED
Indicator
Power
Supply to
Work the
Dispenser
Detect
Hand
Presence
Detect No
Hand
Presence
Dispense
Sanitizer
Stop
Sanitizer
Flow
Monitor
Sanitizer
Levels
Notification
system
Ensure Safe
Use and
Durability
15. Morph Chart and Design Alternatives
Alternative 1
Infrared Sensor, Infrared Temperature
Sensor, Washer Pump, IR Sensor Feedback,
Ultrasonic Sensor, LED Indicator, LCD
Display, Battery, Plastic, In a Box,
Lightweight
Alternative 2
Ultrasonic Sensor, Gravity-fed Mechanism,
Timer Mechanism, Weight-based
Measurement, Wireless Signal, LCD Display,
Direct Electrical Connection, ABS Plastic,
Cylindrical, Built-in Handles
Alternative 3
Camera-based Detection, Electric Pump,
Timer Mechanism, Float Sensor, Buzzer, LCD
Display, USB Power Bank, Metal, Compact
Rectangle, Foldable Components
Function Mean 1 Mean 2 Mean 3 Mean 4
Detect Hand
Presence & Body
Temperature
Infrared Sensor Ultrasonic
Sensor
Infrared
Temperature Sensor
Camera-
based
Detection
Dispense Sanitizer Electric Pump Gravity-fed
Mechanism
Washer Pump -
Stop Sanitizer Flow Ultrasonic Sensor Timer
Mechanism
- -
Monitor Sanitizer
Levels
IR Sensor
Feedback
Float Sensor Optical Sensor Weight-based
Measurement
Notify Low
Sanitizer Levels
LED Indicator Buzzer Wireless Signal Display
Panel
Show Users’ Body
Temperature
LCD Display - - -
Power Supply Battery
(Rechargeable)
Direct Electrical
Connection
Solar Panel USB Power
Bank
Feature Mean 1 Mean 2 Mean 3 Mean 4
Material Plastic Metal Aluminum ABS Plastic
Outer Design Compact
Rectangle
Cylindrical In a Box -
Portability Lightweight Built-in Handles Wheels Foldable
Components
16. Best Alternative
Alternative 1: Infrared Sensor, Electric
Pump, IR Sensor Feedback, Ultrasonic
Level Sensor, LED Indicator, LCD Display,
Battery, Plastic, In a Box, Lightweight
# Objective Weight
DATUM
Alt.1 Alt.2 Alt.3
1
Use infrared sensor technology for
hand detection without physical
contact.
10 + - -
2 Easy to use for all age groups. 7 + + S
3
Clear refill indicators (LED
notifications). 9
- - +
4
Long-lasting components (e.g., high-
quality pump and sensors). 9
+ + +
5
Resistant to daily wear and tear in
high-traffic environments. 8
+ + S
6
Must meet hygiene standards (no
direct contact). 10
+ S +
7
Safe for frequent use (non-hazardous
materials). 8
+ + +
8
Small enough to be installed in
various locations (compact
dimensions).
8
+ + +
9
Low-cost materials that maintain
quality. 7
S + -
10
Efficient use of sanitizer to minimize
waste. 8
+ + S
TOTAL POSITIVES (+) 68 55 44
TOTAL NEGATIVES (-) -9 -19 -17
Total score (sum products) 59 36 27
Pugh’s
Method
19. Testing Results
0 10 20 30 40 50 60
0%
20%
40%
60%
80%
100%
120%
Experimental Test and Result of
Sensors
Accuracy In detecting hand presence
Accuracy in detecting temperature
Accuracy in dispensing sanitizer
0 5 10 15 20 25
92%
94%
96%
98%
100%
102%
Accuracy in Showing Alert of Low
Level
20. Cost
Analysis
Components Price
Washer Pump 150 SAR
Infrared Temperature
Contactless Sensor
60 SAR
IR Sensor 20 SAR
Ultrasonic Sensor 25 SAR
Arduino
(Microcontroller)
60 SAR
Relay Module 25 SAR
Battery (12 V) 120 SAR
Battery (9 V) 40 SAR
LCD Display 40 SAR
LED 0.5 SAR
Breadboard 25 SAR
Breadboard Jumpers 20 SAR
21. How It Works?
Health Monitoring: Infrared
Temperature Sensor
Measures the user's body
temperature without contact.
Displays the temperature in real-
time on an LCD screen.
Key Function: Touchless Sanitizer
Dispensing
Ultrasonic Sensor: Detects the user's
hand.
Microcontroller: Activates the pump to
dispense a predetermined sanitizer
amount.
Auto Shutoff: Prevents waste by
stopping the pump when the hand is
removed.
Refill Notification: IR Sensor
Monitors sanitizer levels in the
container.
Alerts the microcontroller
when levels are low.
LED Indicator: Lights up as a
refill notification.
Power Source: Rechargeable
Battery
Ensures operation during power
outages.
Suitable for areas without electrical
access.
