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Only available in The Netherlands



Heat-on Block system – a safer alternative to oil baths


Heat-On makes your chemistry safer, cleaner and faster

Replace messy oil baths, heating mantles and avoid spills.
Heat-On accepts vials, tubes and flasks from 10 ml to 5 litres. Fits on all leading hotplate brands with a 145mm Ø top plate; optional adapter plate for 135mm Ø top plates.


  • Unique well design eliminates cracking of flasks.
    Blocks feature two probe holes for added convenience. Optional and detachable lifting handles. Optional PTFE Safety Covers reduce risk of user touching hot blocks.
  • Solid aluminium blocks provide even heating.
    Lightweight design allows rapid heating. Use up to 260˚C. For vials, tubes and flasks from 10 ml to 5 litres, plus option for Florentine (pear-shaped) flasks.
  • Choice of block finishes.
    Fluoropolymer coating gives superb chemical resistance. Anodised finish is durable, lower cost option.
  • Heat-On heats hotter, faster
    Heat-up tests have shown Heat-On can boil a 250 ml flask of water in under 11 minutes, faster than an oil bath and faster than other blocks

The risk of oil fires and injury from hot oil spills, plus the mess and cost associated with the use of oil means that oil baths no longer represent safe working practice in labs.


Heat-On Heat-up Summary

The following data is a summary of time taken for Heat-On to boil various volumes of water. The data was compiled using a Carousel Stirring Hotplate set at its maximum operating temperature.

Volume (ml)
Volume (ml)
Temperature C
Contents time to reach boiling
10 6 310 4 min 48 sec
25 15 310 5 min 54 sec
50 30 310 7 min 12 sec
100 60 310 7 min 54 sec
150 100 310 10 min 36 sec
250 150 310 9 min 48 sec
500 300 310 13 min 30 sec
1000 600 310 17 min 06 sec
2000 1200 310 26 min 18 sec
3000 2000 310 39 min 36 sec
5000 3000 310 51 min 00 sec


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