2019-4-8 · PDA-S Photo Diode Amplifier with Switchable Gain The PDA-S is a universal, sensitive pre-amplifier for photo diodes. • Ready to use and easy to use • Low noise • Optional: integrated photo diode • Several mounting options and fiber connector styles Price (EU-countries): 8 % surcharge for non-European countries plus shipment and possible import duties/taxes in the destination country.