... acoustic properties NLEPF synthetic material, its shape delicate appearance, waterproof, dustproof, can be adapted to most site conditions. And ... 49mm or a M49 × 1.5's gong jack.Ultrasonic Sensor Main technical characteristics: 1, non-contact measurement, environmental protection ... Display resolution: d = 1mm/1cm calibrated settings Keyboard: 3 Waterproof touch keys Data Output: Current: 4 ~ 20mA or 0 ...