The Scientists of ICAR-Central Institute of Agricultural Engineering, Regional Centre, Coimbatore have developed a Touch-free Hand Wash System and Portable Touch-free Hand Sanitizer Unit. The Unit can be adopted for hospitals, offices, malls, crowded markets, railway stations and industries, etc., for preventing the spread of COVID-19. It can disinfect the hands of one person at a time.
Touch-free Hand Wash System
The developed Touch-free Hand Wash System consists of water tank, photo diffuser sensor, 12 V DC water pump, DC speed regulator, 12 V DC Battery, relay board, touch-free sanitizer dispensing unit and water disposing plastic hose.
As soon as the hands come in contact with the sensor, it produces output pulse relay that triggers (act as a switch) the pump to turn it “On”. The pump, in turn, ensures the flow of liquid soap / water from tank to liquid soap / water outlet. A single relay triggers up to 5 ml of hand wash from Touch-free Dispenser Unit and 100 ml of water from water tank. The discharge rate of liquid soap and water could be regulated based on necessity by using the DC regulator switch. The system can be powered by AC current along with a provision to use in DC battery for portable use also. The single full charge of the battery will make system to work up to one day. The provision is also given for charging the battery and operating by the solar panel. The cost of the system is about Rs.10,000/-.
Technical Specifications of the developed unit is:
|
S. No. |
Component |
Specification |
|---|---|---|
|
1. |
Water tank |
100 litre |
|
2. |
Liquid soap tank |
1 litre |
|
3. |
Photo diffuser sensor for liquid soap and water |
12 V DC 3 wire type Range: upto 125 mm |
|
4. |
Relay board for liquid soap and water with control box |
12 V DC to withstand upto 9 amp |
|
5. |
Battery |
12 V DC 9 AH |
|
6. |
DC Water pump |
12 V DC 1 AH |
|
7. |
DC Speed regulator |
Potentiometer to PWM Module type DC 3 V - 35 V; Power - 90 W |
|
8. |
Input & Output hose for hand wash |
Plastic 6 mm hose |
|
9. |
Input & Output hose of water pump |
Plastic 15 mm hose |
Portable Touch-free Hand Sanitizer Unit
The Touch-free Soap Hand Sanitizer Unit is a stand-alone wall mounted or placed on the table for dispensing the sanitizer without touching the unit. In this unit, a Photo diffuser sensor is located near the outlet in order to detect the users’ hands. As soon as the hand is detected, the relay (act as switch) triggers the AC / DC pump to operate and up to 5 ml of sanitizer can be dispensed at delivery end. The provision is given to use 12 V DC water pump with 12 V DC Battery. The cost of the Portable Touch-free Hand Sanitizer Unit is about Rs.1,000/- only.
Technical Specifications of the developed unit is:
|
S. No. |
Component |
Specification |
|---|---|---|
|
1. |
Sanitizer tank |
1.5 litre |
|
2. |
Photo diffuser sensor |
12 V DC 3 wire type Range: upto 125 mm |
|
3. |
Relay board |
12 V DC to withstand upto 9 amp |
|
4. |
AC pump DC pump (If DC pump available) |
220 - 230 V 12 V DC |
|
5. |
Input & Output hose |
Plastic 6 mm hose |
(Source: ICAR-Central Institute of Agricultural Engineering, Bhopal)
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