M 21 Hotplate/Stirrer

Quantity: 1

The M 21 hotplate/stirrer in a cost effective design with built in advanced safety and user features. These hotplate stirrers all have superb performance such as soft-start for the stirring motor, PID control of the liquid and hotplate temperatures for fastest heat up time without overshoot and temperature stability, acid resistant epoxy-finished chassis and grade 304 stainless steel covers, combined with
a stainless steel shroud between hotplate and cover to avoid the entrance of spills into the interior. Features a direct display of the set and safety temperatures on the front panel of the instrument. Available with RS485-interface which enables easy setting and readout of all relevant parameters. Both the heating power and stirring speed are adjustable with easy to use knobs. 

Currently only available in 230V

  • 1 safety circuit
  • Safety temperature
  • External PT100 connection
  • Contact thermometer connection
  • Soft start
  • Timer function
  • RS485 interface (RS232 possible via adapter)
  • Resistant stainless steel cover
  • Control software available


Speed ​​range [1 / min] 60-1600
Temperature range [° C] RT (+5) - 350
Heating power [W] 500
Shape of the heating plate round
Heating plate type stainless steel
Suitable for round bottom flasks -
Suitable for oil or sand bath -
Dimensions of the heating plate [mm] Ø 130
Digital display type LED
Speed ​​display Yes
Temperature display Yes
Timer display Yes
Timer function Yes
Ramp function -
Stirring amount, max. (H2O) [l] 10
Accuracy of the temperature control [° C] -
Accuracy of temperature control [° C]
(with external sensor)
± 1
Interfaces for external sensors PT100, KTA
Programmable safety temperature Yes
interface RS485
Power supply [V] 230VAC 50Hz, 115VAC 60Hz
Weight [kg] 2.6
Width (mm] 145
Height [mm] 110
Depth [mm] 210
Degree of protection according to DIN EN 60529 IP32
Motor type DC
Motor rotation CCW
Operating mode Endurance run
Certification CE
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