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Instrument Database:
PicoTrace - Safety Hot Plate SFH 2820 N
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| Year of introduction |
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| Status |
available |
| Company |
PicoTrace
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| Categories |
Clean Chemistry: General
Sample preparation: Hot Plates
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In ultra trace element and isotope analysis, hot plates usually come into play at the end of an expensive and time-consuming preparation process. If they are used in a corrosive atmosphere over a long period of time, they present a special risk for a laboratory. They provide a remarkable contribution to contamination and often they are the source of a fire. Since many laboratories are equipped with highly sophisticated instrumentation, even a small fire may cause tremendous contamination, damage and costs.
Concept for PicoTrace Safety Hot Plates
- The temperature controller is separated from the hot plate and positioned outside the aggressive atmosphere either in its own cabinet or integrated into the ventilator cabinet of the clean air laminar flow workstations.
- The hot plate is controlled by a microprocessor, operates with great precision and is highly resistant to wear and tear. The temperature and its regulation parameters are continuously displayed.
- The reliable control of the temperature guarantees reproducible conditions for chemical reactions.
- Both, controller and hot plate are supplied with independent temperature limitation switches.
- The controller is twice protected against overriding a set temperature.
- If its safety elements fail, three independent temperature limitations of the hot plate will react successively. Two of them will be reset, if the temperature of the hot plate has decreased 6 to 10°C. A third limitation (activated by the signal of an independent Pt-100 sensor) finally switches off the power supply of the heating circuit. This circuit has to be reactivated manually after a check of the system.
- The safety functions can be easily checked.
The price for this technical solutions appears to be high. However, in the face of the potential danger growing out of traditional hot plates, it is economical. This high safety standard is absolutely necessary if perchloric and hydrofluoric acid is involved in your preparations.
Construction:
The hot plate is made from a massive piece of AlMg-alloy. The metal surface is especially treated to create an extra hard Al2O3 surface of 50 micron thickness. All surfaces, which may come in contact with acids or acid fumes are made of PTFE or an AlMg-alloy coated with PFA. A sandwiched (PTFE-AlMg-alloy) cooling plate reduces heat transfer to the bench underneath. The hot plate is threefold protected against overheating. With PicoTrace controllers protection is fivefold. All cables are in a PTFE jacket.
The hot plates are especially suited for the evaporation of acids during ultra trace element and isotope analysis.
Advantages of the hot plate SFH 2820 N:
- PFA - protected surface on top of a strong corrosion resistant oxide layer: no corrosion, no source of contamination!
- All electrical elements are encapsulated to guard against contact with acid fumes.
- The threefold overheat protection guarantees safety.
- Combined with PicoTrace time-temperature controllers, precise control of the temperature and time is possible and the security of the system is considerably enhanced.
- Long lifetime predicted and proofed since three years.
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| Specifications |
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Dimensions: L: 400 mm W: 200 mm H: 80 mm (variable on request)
Heating area: W: 200 mm L: 280 mm
Weight: 7 kg
Current: 1000 W / 220-250 V (variable on request)
Maximum temperature: 240 °C
overheat limitations: 240 - 265°C (lower limits on request),
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