Anti- Corrosion Compact Ultrasonic Liquid Level Meter Indicators Item ≤300~350mm（According to the different range and sensor） Output signal 4~20mA three wire system(default)，4~20mA four wire system，1~5V，RS485,1~10V， RS232，1~2 relays or others Beam angle Display Keyboard Multi information LCD display Operating temperature Working power quick connector Mounting mode screw, sifter clamping,Thread size：M49×1.5mm Application environment normal pressures，non-explosion-proof，non- corrosive environment Default：PDF BOOK，anti-explosion symbol ExiaⅡ AT3 Defend grade Three light touch buttons Xi 'an Gavin Electronic Technology Co., Ltd