Article No. (see product description) Piezo hydrophone PH-1.0-20, PH-2.0-20, PH-3.0-10 Back to list add to offer list PH-1.0-20PH-2.0-20PH-3.0-10 Piezo hydrophone PH 1 mm – 20 MHz Piezo hydrophone PH 2 mm – 20 MHz Piezo hydrophone PH 3 mm – 10 MHz