RF-TTI Technology An Efficient Tool for Online Temperature Monitoring Dr. Tal Gueta-Neyroud FreshPoint Quality Insurance Ltd.
Common Chilled/Frozen Products Pharma Chilled / Refrigerated Meat Dairy Ready Produce and Fish to Eat Frozen Vegetables Ice Cream Meat and Poultry Fish
Typical Chill Chain for Seafood Producer Transport Storage Wholesale Retail
Typical Chill Chain for Seafood The preservation of the chill chain integrity from "farm to fork" is indispensable to reduce costs, decrease product waste, lessen shrinkage problems, and insure the product's quality.
What is a Time Temperature Indicator? A TTI is a simple device that displays a summary of the aggregate time temperature history of the product to which it is attached TTIs work by producing a change in one property as a response to a predetermined stimulus. This property varies as a function of the time, at a rate which is temperature dependent. TTIs cannot provide information on the starting condition of the goods, i.e. proper manufacturing or presence of harmful substances.
Preservation of the ChillChain The preservation of the chill chain integrity from "farm to fork" is indispensable to reduce costs, decrease product waste, lessen shrinkage problems, and insure the product's quality. REAL TIME MONITORING
Typical Chill Chain for Seafood Producer Storage Retail Transport Wholesale Check Point
Real Time Monitoring Chill chain management: Isolate ruptures in chill chain Detect weakness in distribution network Allow early warning and decision Added value: Improve traceability Improve stock managing Increase safety for consumers Benefits for producers, retailers and food services : Total transparency in the supply chain. Product value maximization.
Some Benefits of RFID Technology RFID is a well established technology. Verifications without opening the container Checkout becomes a much faster process labor cost reduction Integration to control systems (HACCP)
Chill-On A European Commission-funded project A novel concept for tracking and tracing : TRACECHILL Smart Label: The echill ON smart label, an innovative, consumer and industry relevant product that will be developed through this project. The echill ON Smart Label will be a combination of RFID, TTI, GPS and other technologies. Temperature sensing technologies used today: Wireless temperature sensor based on RFID technology Battery based data logger
The Idea Behind the Electrical TTI The TTI works by chemically dissolving a metal layer in a time and temperature dependent manner Electrical signal 1 Electrical signal 2 Reactive layer (Medium + Etchant) Electrical signal 2 Electrical signal 1 Metal layer The conductive layer is suited for being part of an electric circuit (capacitor, resistor, inductance; antenna etc.)
RF-TTI within the supply chain TTI Antenna Inductance Capacitor Resistor Signal emitted to the chain information system Tagged pallets and cases Reader and Antenna
Effect of Temperature on the Rate 50 Prototype III - 5% Active Ingredient 40 R [kohm] 30 20 10 23 o C 8 o C 4 o C 0 0 24 48 72 96 120 144 168 192 Time [h]
Reproducibility of the Process 50 Prototype III - 3% active ingredient Temperature =4 C R [kohm] 40 30 20 Run #1 Run #2 Run #3 10 0 50 100 150 200 250 Time [h]
Effect of conductive material Conductivity of different materials 5 T = 23 o C Conductivity/Resistance (a.u.) 4 3 2 1 0 conductive material - type 1 conductive material - type 2 conductive material - type 3 0 48 96 144 192 240 288 336 384 time (hrs)
Effect of medium Resistance at various temperatures Conductivity/Resistance (a.u.) 5 4 3 2 1 0 0 500 1000 1500 2000 2500 time [min] Temp = 23 o C Temp = 14 o C Temp = 4 o C
Flexibility of the Parameters The following parameters can be changed to fit the demands from the supply chain: Nature of the viscous media from digital to continuous response. Nature of the etchant. Amount of etchant. Nature of the metal layer. Thickness of the metal layer. A TAILOR-MADE TTI
Summary Passive Device Suited for being part of an electric circuit Low cost Electronic TTI Transmission of data to any receiver station through RFID technology Tailor made TTI
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