PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCHDESCRIPTIONThe H21A1, H21A2 and H21A3 consist of a gallium arsenide infrared emitting diode coupled with a silicon phototransistor in a plastic
RELATIVE HUMIDITY SENSORFEATURESFull interchangeability with no calibration required in standard conditionsInstantaneous desaturation after long periods in saturation phaseCompatible with automatized
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