Hot Plate Digestion System - ToronHP™ 450
The ToronHP™-Series programmable hot plate digestion system pairs a coated aluminum alloy worktop with a 5-inch color touchscreen controller for acid digestion, acid removal, and sample drying. Two models cover heating areas of 600 x 400 mm and 380 x 290 mm. Both carry a maximum design temperature of 350°C and hold temperature to ±1°C. Food, agricultural, environmental, and soil testing labs use them for daily sample preparation. Universities and research institutes run them for method development and teaching work.
Cast aluminum alloy conducts heat quickly and reaches the setpoint faster than heavier plate materials. Precision finishing leaves a flat surface that keeps vessel bases in full contact with the plate. The worktop behaves as a single heating zone, so temperature stays even across a large effective heating area. A protective coating covers the exposed metal. The 600 x 400 mm model handles full batches, while the 380 x 290 mm model suits tighter benches and smaller fume hood openings.
Touchscreen control replaces dials and rotary switches with a table layout where operators type each heating step into a grid. Programs hold up to 40 steps, enough for staged ramp and hold profiles across a long digestion. Dual mode operation switches between single-point heating for routine work and temperature curve heating for programmed protocols. Self-tuning PID regulation matches its own control parameters to the plate. Solid-state relays, segmented power supply, and a power-failure restart function support long production runs.
Hot Plate Digestion System - ToronHP™ 450 Applications
Laboratories apply the ToronHP™-Series wherever samples need controlled heating in open vessels before instrumental analysis.
- Food and Feed Safety Testing: digests food, beverage, and animal feed matrices for heavy metal and mineral content determination
- Soil, Plant, and Fertilizer Analysis: prepares soil, plant tissue, and fertilizer samples for nutrient and trace element work
- Environmental Sample Preparation: processes wastewater, sludge, and sediment samples as part of routine monitoring programs
- Trace Metal Analysis: produces the clear acid solutions that ICP-OES, ICP-MS, and AAS instruments require for aspiration
- Acid Removal After Digestion: evaporates surplus acid so the final solution meets the acid tolerance of the analytical instrument
- Multi-Step Digestion Protocols: runs programmed temperature curves for methods that call for staged heating rather than one fixed setpoint
- Drying, Evaporation, and Reagent Heating: dries residues, concentrates extracts, and warms reagents on a broad, level heating surface
- Teaching and Research Laboratories: gives students and researchers a touchscreen platform that records each program step clearly
Hot Plate Digestion System - ToronHP™ 450 Key Features
Both ToronHP™ models combine a coated aluminum worktop with touchscreen program control for repeatable digestion and evaporation work.
- Precision-Finished Cast Aluminum Worktop: conducts heat quickly and heats evenly across a large effective working area
- 350°C Maximum Design Temperature: covers wet digestion, acid removal, drying, and evaporation across common sample preparation methods
- Protective Surface Coating: shields the aluminum worktop during acid work
- Two Worktop Sizes: 600 x 400 mm and 380 x 290 mm plates match batch size to available bench or fume hood space
- 5-Inch Color Touchscreen: shows program status and setpoints on one clear display, simplifying daily operation
- Table-Based Quick Program Entry: lays each step out in a grid, so operators enter programs faster and make fewer input errors
- Up to 40 Program Steps: stores detailed ramp and hold profiles for multi-stage digestion and acid-removal sequences
- Dual Heating Modes: switches between single-point heating and temperature curve heating without changing hardware
- Self-Tuning PID Control: sets its own control parameters and holds temperature accuracy within ±1°C
- Solid-State Relay Switching: runs quietly and resists electrical interference from surrounding laboratory equipment
- Segmented Power Supply: stages heater power delivery to lower electrical risk during operation
- Power-Failure Restart Function: manages how the system behaves when power returns after an outage, reducing operational risk
Theory and Method
Digestion breaks a solid or semi-solid sample down into a solution that an analytical instrument can handle. Concentrated acids attack the sample matrix while heat drives the reaction forward, oxidizing organic material and freeing bound metals. Open-vessel work keeps the process visible, so operators can watch progress and add reagents as the method directs. Heat reaches the sample by conduction through the base of the beaker or digestion tube. The plate temperature therefore sets the reaction rate for every vessel on the surface.
Aluminum alloy carries heat rapidly through the plate body, which shortens warm-up time and helps the surface recover after cold vessels are placed on it. Machining the cast surface to a flat, precise finish increases the contact area between plate and vessel base, improving heat transfer at every position. Even surface temperature keeps evaporation rates comparable across the worktop, which matters when a batch must finish together. The coating protects the aluminum against acid vapor within the 350°C design limit.
Programmed heating gives the operator control over how a sample reaches temperature. A temperature curve links up to 40 ramp and hold segments, letting acids react gently at moderate temperature before the plate climbs toward evaporation. Gradual approach reduces foaming, spattering, and the sample loss that follows. The PID controller compares the measured plate temperature against each program segment and adjusts heater output through solid-state relays, which switch silently and hold accuracy within ±1°C.
Hot Plate Digestion System - ToronHP™ 450 Technical Specifications
Parameter | ToronHP™-A600 | ToronHP™-A380 |
Worktop Size | 600 x 400 mm | 380 x 290 mm |
Worktop Material | Aluminum alloy with coating | Aluminum alloy with coating |
Maximum Design Temperature | 350°C | 350°C |
Temperature Accuracy | ±1°C | ±1°C |
Temperature Control System | 5-inch color touchscreen | 5-inch color touchscreen |
Heating Modes | Single-point heating and temperature curve heating | Single-point heating and temperature curve heating |
Programmable Steps | Up to 40 steps | Up to 40 steps |