3 High Precision Thermal Demagnetizers (paleomagnetic furnaces) for Palaeomagnetic, Archaeomagnetic and Palaeointensity Research

 

 

MMTD80A

MMTD80A (80 sample thermal demagnetizer). This advanced microprocessor controlled thermal demagnetizer offers the following unique set of features:

  • Simple but sophisticated programmable Heat/Hold/Cool cycle, no need to manually move hot samples from a heating to a cooling chamber.
  • Sophisticated proportional temperature control with power indicator (not ON/OFF controller).
  • Internal calibrated solenoid for creating TRM s. Ideal for ‘double heating’ Thellier experiments.
  • 4 layer Mu-metal shields closed at ends with automatic degaussing and our special electronic activation to improve performance. Samples always in a very low magnetic field less than 10nT, typically 5nT.
  • The oven can be positioned in any orientation, because the shields are closed at one end the oven it can have a north/south or east west orientation, the field remains low.
  • Fast cycle, 80 samples to 500 deg C, 25 min hold at 500 deg C, cool to 40 deg C in less than 80 minutes, that’s an average processing speed of one sample every 60 seconds, fast enough to keep up with any magnetometer.
  • Non-magnetic and accurate thermocouples, we do not use K type thermocouples in any of our instruments as these can become inaccurate with age.
  • Ultra low thermal gradients, Maximum deviation 6 deg C at 500 deg C over full load of 80 samples, 4 deg C over central 40 samples.
  • Absolute temperature accuracy 1 deg C, resolution 0.1 deg C, maximum temperature 800 deg C.
  • Robust ceramic oven element and virtually unbreakable non-magnetic sample holder for long trouble free operation. Built in radiation shields for ultra low thermal gradients.
  • Controlled atmosphere sample holders supplied as standard (vacuum and inert gas).
  • Optional extra MMTDVP 2 stage vacuum pump and fittings.
  • Optional extra MMCCPSU constant current power supply for Thellier experiments, field on during both heating and cooling.
  • Power consumption 2.8 KVA.
  • Battery backup, If mains electricity fails the system remembers the programme sequence and the programme continues once power is restored.
  • Safety Features, no power to oven element when samples are inserted/removed, Software over temperature trip isolates oven and cools, mechanical over temperature trip cuts power to oven. Second ‘policeman’ controller monitors oven and cuts power if all other systems fail.
  • 3-year parts and labour warranty.

 

 

MMTD24, A 24 sample Thermal Demagnetizer with 2 cooling rates for palaeomagnetism and palaeointensity research

  • Robust ceramic oven element and virtually unbreakable non-magnetic sample holder for long trouble free operation.
  • Simple but sophisticated programmable Heat/Hold/Cool cycle, no need to manually move hot samples from a heating to a cooling chamber.
  • Sophisticated proportional temperature control with power indicator (not ON/OFF controller).
  • Internal calibrated solenoid for creating TRM s. Ideal for ‘double heating’ Thellier experiments.
  • 4 layer Mu-metal shields with our special electronic activation to improve degaussing and performance. Samples always in a near zero magnetic field less than 10nT.
  • Ultra low thermal gradients, Maximum deviation 8 deg C at 500 deg C over full load of samples.
  • Absolute temperature accuracy 1 deg C, resolution 0.1 deg C, maximum temperature 800 deg C. repeatability 0.1 deg C, ideal for Thellier experiments as well as conventional thermal demagnetisation.
  • Optional extra MMTDVP 2 stage vacuum pump and fittings, vacuum quartz sample holder.
  • Optional extra MMCCPSU constant current power supply for Thellier experiments, field on during both heating and cooling.
  • Power consumption 2.7 KVA.
  • Battery backup, If mains electricity fails the system remembers the programme sequence.
  • Safety Features, no power to oven element when samples are inserted/removed, Software over temperature trip isolates oven and cools, mechanical over temperature trip cuts power to oven.
  • 3-year parts and labour warranty.

 

MMTDSC

MMTDSC Super Cooled Thermal Demagnetizer with 3 cooling rates for speed and advanced paleointensity experiments

  • Cryocooler for super fast cooling, the MMTDSC is the only commercial thermal demagnetizer that can can cool samples from 700 deg C to below room temperature in 19 minutes. A thermal cycle heat to 500 deg C hold for 15 minutes and cool to 30 deg C takes just 40 minutes, ideal for Thellier experiments where speed and repeatability are important.
  • Three cooling rates for cooling rate experiments, super fast with cryocooled air, fast with normal temperature air and slow (24 hours) natural cooling.
  • Robust ceramic oven element and virtually unbreakable non-magnetic sample holder for long trouble free operation.
  • Simple but sophisticated programmable Heat/Hold/Cool cycle, no need to manually move hot samples from a heating to a cooling chamber.
  • Sophisticated proportional temperature control with power indicator (not ON/OFF controller).
  • Internal calibrated solenoid for creating TRM s. Ideal for ‘double heating’ Thellier experiments.
  • 4 layer Mu-metal shields with our special electronic activation to improve degaussing and performance. Samples always in a near zero magnetic field less than 10nT.
  • Ultra low thermal gradients, Maximum deviation 8 deg C at 500 deg C over full load of samples.
  • Absolute temperature accuracy 1 deg C, resolution 0.1 deg C, maximum temperature 800 deg C. repeatability 0.1 deg C
  • Optional extra MMTDVP 2 stage vacuum pump and fittings, vacuum quartz sample holder.
  • Optional extra MMCCPSU constant current power supply for Thellier experiments, field on during both heating and cooling.
  • Power consumption 2.7 KVA.
  • Battery backup, If mains electricity fails the system remembers the programme sequence.
  • Safety Features, no power to oven element when samples are inserted/removed, Software over temperature trip isolates oven and cools, mechanical over temperature trip cuts power to oven.
  • 3-year parts and labour warranty.