Look for hotplates with two independent temperature control circuits, which switch off heating in case of an over temperature situation.water cooled reflux) do not use hotplates that have open housing designs. Where liquid spills can be anticipated (i.e. Your 1500 furnace may be wired either directly through a conduit system or by using a power Thermolyne Hp-A1915b Thermolyne Type 19ot Plate Corning Pc-351. Select hotplate housing designs that are less affected by spills and aggressive environments.Unplug inactive hotplates or heating mantles in close proximity to oil baths, combustible or flammable material.When only stirring is required, acquire and use a stirrer instead of a hotplate/stirrer combination.These models include the Corning PC-35 and PC-351 (pictured above) and the Thermolyne Model:SP46925. Hotplates purchased prior to 1984 do not have temperature feedback controls. Discard old hotplates through Emory Surplus.Similarity of heating/stirring control dials and left /right reversal of control dials on hotplates from different manufacturers can lead to user errors.Temperature sensors may be misplaced, fall out or malfunction.Hotplate/stirrer combinations generally stay plugged in even when inactive.Hotplate/stirrer combinations may be used when only stirring is required.Newer hotplates with TRIAC or microprocessor-controlled heater switches may spontaneously heat in the OFF position due to liquid exposure to the electronics. Pc-351 Hot Plate 120V Corning Pc-35 Digital Hotplate Stirrer Corning Pc-420. Liquids in contact with electronics may cause shorts. User manuals, IKA Laboratory Equipment Operating guides and Service manuals.Older hotplates with relay heater switches can spontaneously heat in the heater dial OFF position.
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Hotplates manufactured from 1960s – 1980s may still be in active use.In 2007, 2011, 2012, 2014 the University of California, University of Pennsylvania, MIT, and Oak Ridge National Lab issued similar safety advisories for Corning PC-35, PC-200, PC-220, PC- 351, Fisher IsoTemp and the Thermolyne Model:SP46925.
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The Corning PC-351 Hot Plate Stirrer has a sturdy ceramic top and independent heating and.