Controlled Constant Temperature Heater

Price: $29

The MicroLab Model 257 20-watt controlled temperature immersion heater works with a MicroLab FS-528 and Model 103 thermistor to monitor and control solution temperature for controlled-temperature experiments such as kinetics or cell growth.  Temperature range is ambient to 70oC.   Temperature may be maintained ± 0.02o C of a target temperature in a stirred solution.  Power is provided by the MicroLab FS-528 interface.



Quick Facts

Applications: Chemical Kinetics, Constant Temperature Experiments

Features: Easy to Clean, Rugged

Technical Description

This heater is slightly larger than a pH electrode.   The heater element is ceramic and chemically inert.   It operates under MicroLab program control to produce an adjustable output from 1.6 to 20 watts.  The target temperature may be set in one degree increments from ambient to 70 o C.  The heater operates under proportional control,  which reduces the power delivered to the solution as it approaches the target temperature. The heater may be mounted in a FS-528 spectrophotometer vial, or with a clamp in a beaker of water placed on a stir plate.   It can heat water samples up to about 200 mL, and control their temperature to ±  0.2oC.

Technical Specifications

Light Source:

20 W

Power Supply:

Power Supply:  Controlled 12 VDC from MicroLab FS-528.

Output power range:  1.6 to 20 watts


12.5 cm diameter, length 12 cm, cord 40 cm.


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