Scitec OPTICAL CHOPPER
USD $97.00
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Bentham 218 Variable Frequency Chopper
Specs at a glance for the 218
Additional Information
The 218 optical chopper consists of a free-standing or modular control unit coupled by a 2m long lead to the chopping head. Four, easily interchangeable, chopping discs are provided as standard which allow chopping frequencies in the range of 0.5Hz to 4kHz (3kHz for the modular control unit). A variable aperture 2-slot disc and higher frequency discs are also available. The free-standing control unit includes LCD display of chopping frequency, while the modular unit uses a digital indicating dial. Both units provide a square wave reference output suitable for use with lock-in amplifiers.
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