Specifications and price list model resonant frequency (KHz) 10dB frequency bandwidth (KHz) Sensitivity (dB) Appearance (mm) shell material Remarks SKMA50 500 300 ~ 1000> 60 Ф18 × 17 stainless steel SKMA 40 400 100 ~ 500> 65 Ф18 × 17 stainless steel SKMA 30A 300 280 ~ 320 -55dB * Ф20 × 20 aluminum air-coupled transducer SKMA 30 300 80 ~ 400> 60 Ф18 × 17 stainless steel SKMA 20A 200 180 ~ 220 -55dB * Ф24 × 20 aluminum air-coupled transducer SKMA 20 200 150 ~ 600> 60 Ф18 × 17 Stainless SKMA 15I 150 100 ~ 400> 65 Ф30 × 35 aluminum built 40dB amplifier SKMA 15 150 100 ~ 400> 65 Ф18 × 17 Stainless SKMA 07 70 40 ~ 100> 70 Ф18 × 20 Stainless SKMA 04AI 40 35 ~ 45 -44dB * Ф30 × 40 aluminum blank media, built-in amplifier SKMA 04A 40 35 ~ 45 -44dB * Ф20 × 20 aluminum air-coupled transducer SKMA 04I 40 30 ~ 140> 80 Ф30 × 35 aluminum built-in 40dB amplifier SKMA 04 40 30 ~ 140> 80 Ф22 × 20 stainless steel SKMA 03 30 20 ~ 110> 75 Ф22 × 24 stainless steel SKMA 02 20 10 ~ 70> 70 Ф22 × 33 stainless steel Note 1 * For conventional (contact) acoustic emission sensors: 0dB = 1V / m / s for air-coupled transducer: 0dB = 1V / Pa Note 2 * sensor prices are inclusive of one meter line, including low-noise signal. Other Length: 2 meters 120 yuan, 160 yuan 3 m, 4 m 200 yuan. Note 3 * coupling agent 80ml price is 100 yuan / bottle.