Personnel, Vehicle & Area Sanitization Equipment

Automated Disinfectant System (ADS)

• A multi-purpose disinfection chamber has been developed that can be customized for vehicles and personnel sanitization. The system supports automated operation with limited manual intervention.
• The Twin Fluid injection produces fine mist that covers a large surface area while consuming less disinfectant. The system commence spraying of disinfection during vehicle drive-in with timer based operation as per WHO approved guidelines. System components include - Drive in Disinfection Chamber, 3-D printed twin fluid Nozzle, Solenoid Valve, Motion Sensor, Timer Unit, System Piping, Compressor (optional), Hydraulic Pump (optional) etc.
• This counter-COVID technology is a spin-off of the Mist based Infrared Suppression Technology (MIST) designed by NSTL for naval ships stealth requirements. In this technology, the Twin fluid system produces very fine droplets compared to single fluid system and so, less fluid is required to achieve the required cooling.
• Estimated cost less than Rs 1,50,000 (inclusive of compressor and pump)

Evaporating Fogger for Sanitization

• An evaporator type fogging device has been developed by DIPAS for sanitization of work spaces and associated accessories. The fogger can be used with any type of chemical suitable for particular disinfection purpose.
• The systems consist of a small chemical reservoir (CR), suction mechanism, evaporation mechanism and a blower. The size of the reservoir is so optimize to avoid the wastage of the chemical. The main stock of the disinfection fluid remains in a separate chemical chamber (CC) which is air tight and does not allow the reaction with air. From this chamber the fluid goes to the reservoir below the evaporator from where the suction mechanism picks it for evaporation. Electronic sensor and solenoid valve maintains the required level in the reservoir.
• As soon as the system stops, the supply is automatically cut off. The timer starts and stops the blower according to the pre-set values displayed on Digital timer provided on front side. Complete system and chemical chamber are made up of stainless steel to avoid any corrosion.
• The capacity of chemical reservoir is 500ml. Separate air-tight chemical chamber for the additional disinfection fluid has 4 liters capacity. The system can be easily handled/ transported.
• Enclosure of about 1000 cubic ft would require fogging time around 8 minutes with dwelling time of 60 minutes. The fogging time can be calculated depending upon the size of the room, dwelling time will remain same. The operation can be easily handled as per SOP.
• The system is being mass produced by identified industry partner(s).

FOGG SANITIZER – DISINFECTION OF ROOM/CHAMBER

• Disinfection with Hydrogen Peroxide (H2O2) is a low-pressure, low-temperature, nontoxic process that uses vaporized Hydrogen Peroxide to reduce the level of infectious agents. H2O2 is strong oxidant and can be used as potent broad-spectrum germicide. H2O2 belongs to the category of High-Level Disinfection (HLD). Disinfectants of this level kill all vegetative microorganisms, mycobacteria, lipid and nonlipid viruses, fungal spores, and some bacterial spores. It is safer than chlorine.
• The rooms/closed chambers may be disinfected as per the validated protocol.
• The specifications:
  • Volume of the chamber/room: -1500 cubic feet
  • Concentration of H2O2:-5.5% + 0.01% Silver nitrate
  • Volume: 600ml
  • Fogging time: 10-12min
  • Time of dwell: 60-70min
  • Temperature: 30º ± 3ºC

Germiklean- Dry Heat Sanitization System

• In the Covid-19 pandemic situation, prevention through sanitization is most effective way to remain safe. Keeping this in mind, Germiklean has been developed to sanitize the Uniforms, canes, polycarbonate shields, files, papers, metals, ceramic items etc. Germiklean is a dry heat based system which uses hot air at 70°C for 10 minute cycle to sanitize items placed inside.
• The systems consist of a mild steel powder coated box having a working chamber made up of stainless steel (Grade 304) and a heating chamber.
• The heating chamber consists of a heating element, timer, sensor cum controller and a blower to maintain the required temperature inside working chamber for the sanitization of items. Forced convection system is used for proper mixing of heat and maintains the uniform temperature inside the working chamber. Measures have been taken to ensure zero heat loss e.g. insulating material is filled in the gap between the inner chamber and outer body, double walled door filled with glass wool, and Synthetic gasket fitment on the door.
• The system has modular design and the dimensions can be changed depending upon the requirement. The Germiklean in picture depicts Poly urethane insulated MS chamber with 304 grade Stainless Steel internal chamber of dimensions (W x D x H) 1875mm x 850mm x 1600mm. It has got air handling unit (AHU) with heating system for maximum temperature of 100°C and working temperature of 70°C. It has provision of 24 Hangers in 3 fixtures inside the chamber with in-built door lights.
• A mini system has also been developed and system is being produced by identified industry partner(s).

PEN AND POCKET SANITIZER ACCESSORIES

• A few small innovative accessories are developed to enable safe day to day work with respect to COVID-19 prevention
• A pocket sanitizer is developed so that it is easy to carry in pocket or purse. It has a protection cap that prevents its accidental usage and a press based control is provided for the dispensing of the sanitizer product. The device can be refilled by the user through the refilling site. This pocket spray device is cost effective, easy to handle and has leak-proof refillable mechanism.
• A touch sanitizer pen is developed to prevent the spread through touch of lift buttons, electric switches etc. This touch sanitizer pen is easy to carry in pocket or purse. This touch sanitizer pen is cost effective, easy to handle and has refillable mechanism.

PERSONNEL SANITIZATION ENCLOSURE (PSE)

• Full body disinfection chambers have been developed called as Personnel Sanitization Equipment. This walk through enclosure is designed for personnel decontamination, one person at a time. Approximate size is 9 X 7 x 9 feet (floor area 60 square feet)
• Decontamination action is started using a foot pedal or automatic at the entry. On entering the chamber, electrically operated pump creates a disinfectant mist.
• The mist spray is calibrated for an operation of approximately 25 secs and stops automatically indicating completion of operation.

PERSONNEL SANITIZATION ENABLER (PERSAN)

• A sanitization enclosure called PerSan comprising of a Chamber and a Fog generator is developed
• The chamber is made from skeleton of steel pipes coated with epoxy or acrylic paint/powder or of UPVC pipes. The structure is covered except the openings for entry and exit portions, using polythene film of 200 - 240μm, those normally used in poly-houses
• The two openings, for entry and exit, are closed with either strip curtains or shower curtains
• The assembly of the chamber is such that, the base of the chamber is 1m x 1m and the height is 7 ft
• The design enables assembly of the chamber in few hours. It is equipped with two fog generators of capacity of about 3L/ hr or single fog generator of capacity 5 – 6L/hr
• The fog generator is an ultrasonic transducer-based humidifier that generates fog of 1 to 5 μm aerosols
• The system has following features:
  • In-built reservoir tank for storage
  • Solenoid valve with liquid level sensor for replenishment of liquid in fog generation tank from the reservoir tank
  • IR (proximity) sensor in the power supply circuit of fog generator
  • The time selector for setting of time for fog generation from 15s to 1 minute
  • Optimised fog generation tank dimensions to produce maximum fog
  • Uses More than 95% indigenous components
  • Ease of maintenance and servicing.

PORTABLE BACKPACK AREA SANITIZATION EQUIPMENT

• A portable sanitization equipment has been developed for spraying decontamination solution consisting of 1% Hypochlorite (HYPO) solution for sanitization of open areas
• The portable system can be mounted as a backpack and carried by the operations personnel
• This system incorporates low pressure twin fluid (air & disinfectant liquid) technology to generate very fine mist. The system is capable of disinfecting an area of upto 300 m2.
• The application areas can include hospital reception, doctor chambers, office spaces dealing with general public, corridors, pathways, metro and railway stations, bus stations etc.

TROLLEY MOUNTED LARGE AREA SANITIZATION EQUIPMENT

• The DRDO Lab has also developed a larger area sanitization equipment for with higher capacity tank which is carried on a trolley.
• It has a tank capacity of 50 Litres and has a lancing (throw) distance of 12-15 m.
• This system incorporates low pressure single fluid (disinfectant liquid) technology generating very fine mist. The system is capable of disinfecting an area up to 3000 m2.
• This is useful for disinfecting hospitals, malls, airports, metro stations, isolation areas, quarantine centers and high-risk residential areas.

VEHICLE SANITIZATION ENCLOSURE

• Vehicle Sanitization Enclosure is conceptualized using locally available material based on the existing 4-men tent (Ordnance Supply). Since it is a very light weight system with portable canopy, it can be made operational in less than 3 hours.
• An electrically operated positive displacement pump is utilized to create a disinfectant mist inside the tent canopy through which the vehicles are passed. A separate tank of 500 Ltr capacity for storage of disinfectant is used which requires refilling after 200 number vehicles are disinfected. The system is noise free and needs 10 minutes break every 4 hours operation.
• The system can be utilized at any location including entry location for Sanitization of vehicles. Hospitals, army units and administrative offices having high ingress and egress can deploy this system.

VEHICLE SANITIZATION SYSTEM (FOG BASED)

• Another vehicle sanitization enclosure is developed, comprising of a fog generator and a Flexible hose with adapter.
• The fog generator is basically an ultrasonic transducer-based humidifier that generates fog of 1 to 5 μm aerosols.
• The fog generator is operated for 30s to 60s depending on the volume inside the vehicle.
• The fog generator is operated using a foot switch. It takes 3 – 4s for fog to start accumulating in the vehicle and within 30s the vehicle gets filled with the fog.
• The fog generators has the following features:
  • In-built reservoir tank for storage of disinfectant
  • Solenoid valve with liquid level sensor in fog generation tank from the reservoir tank
  • IR (proximity) sensor in the power supply circuit of fog generator
  • The time selector for setting of time for fog generation from 15s to 1 minute
  • Optimised fog generation tank dimensions to produce maximum fog
  • Uses More than 95% of the components are indigenously available.
  • Ease of maintenance and servicing.

MOBILE AREA SANITIZATION SYSTEM

• Based on the experience of dust suppression systems for use in deserts, another version of ‘Mobile Area Sanitization System’ is developed by a DRDO Lab. It uses Sodium Hypochlorite solution to sanitize larger areas.
• Two variants have been developed, one for outdoor use mounted on a ‘B’ class vehicle and another for indoor use mounted on a battery operated cart. The former can spray to a distance of 6-7 m distance and the later to 2-3 m distance.

SANITIZING MATS FOR SHOES AND CAR

• Shoes have high potential of spreading virus from one place to another. In COVID wards 65% of shoes are found to be infected by Corona Virus. Similarly car tyres are also be potentially highly infective.
• To prevent the spread of corona virus through shoes and car tyres a threading based PVC Mat based solution is made. Artificial grass is the second choice. Rubber & Coir mats are not suitable.
• 150ppm sodium hypochlorite gel used as the disinfectant has advantages of enhanced stability, better moisture retention and non-chlorine composition. This leaves minimum footprint which can be wiped off easily. For cars 200ppm solution can be used.
• Continuing bacteriology tests has shown 2-log scale kill effect and is safer to handle compared to alternative solutions.
• Operating precaution - It is recommended that gel should be stored in glass/HDPE grade plastic bottles. 50ml gel is to be applied per sqft using gloves and hands to be washed immediately after handling the gel. One application is applicable for 15 cars/two hours. The mats may require running water wash every 2 hours.
• No damage is observed to shoes or tyres for 20 hrs dip
• Sunlight may decrease the efficacy
• These can be deployed at the entrance of main office buildings, door of office rooms, rooms frequented by crowds like cafeteria and meeting Rooms, home entrances.

SANITIZING MATS FOR SHOES AND CAR – BENZALKONIUM CHLORIDE BASED

• An alternative to the gel based design is developed, in which the product comprises ofa trough made of stainless steel and a mat. The chemical used for disinfection is Benzalkonium chloride which has been recommended for disinfection against SARS-COV-2.
• The detailed specifications for Driveway Sanitizer are:
  • Dimensions of trough and mat: 20’(L) X 21” (W) X 1.4” (D)
  • Material of Trough: Stainless steel (304), 1.5 mm thick
  • L Angle: 40 mm X 40 mm X 4 mm
  • Thickness of mat: 16 mm
  • Material of mat: PVC
  • Chemical: 2% Benzalkonium chloride
  • Volume: 6 lts for each trough (120ml diluted to 6000ml) 
  • Standard Operating Procedure: Trays should be leveled properly before fixing on the surface so that the liquid spreads equally in the whole tray. Pour the 6 ltmixture over the mat in the tray so that it spreads properly. Thus a total of 12 lts solution is required for both the trays.
• The detailed specifications for Shoe Sanitizer are as follows:
  • Dimensions of the trough: 4’ X4’ X1”
  • Material of Trough: Stainless steel (Grade 304)
  • Material of the mat: PVC 
  • Thickness of the mat: 16 mm
  • Area to be covered with mat after shoe sanitization tray:  6 X 4 ft
  • Sanitizer absorbing foot mat: Cotton mat (30 inches X 20 inches). To be placed just after the long mat (6ft X 4 ft).
  • Volume: 2.5 L (50ml diluted to 2500ml)
  • Standard Operating Procedure: Pour the mixture over the mat in the tray so that it spreads properly.
• The mats should be washed thoroughly fortnightly or depending upon the usage.
• An appropriate concentration of this compound needs to be replenished on daily basis.