Comparison : Item # SMT-0540-S-R, 3 Volt (V) Rated Voltage (V0-p) for Square Wave Transducer
Item # SMT-0540-T-2-R, 3 Volt (V) Peak-to-Peak Rated Voltage (Vp-p) for Square Wave Transducer
Item # SMT-0540-T-7-R, 3 Volt (V) Peak-to-Peak Rated Voltage (Vp-p) Transducer
Item # SMT-0540-T-9-R, 3 Volt (V) Rated Voltage (V0-p) Transducer