Fuzhou Canwell Import & Export Co Ltd

Model Number: 440 Key Specifications/Special Features: Advantages:External level measurement with safetyGlobal first two-wire systemEasily installation, trial run and maintenanceAuto-diagnosed and collationVideo display and remote on spotSonar technology

Work principle:

• External liquid lever indicator with sonar ranging principle, using thespecial probe gets the sonar signal, probe has been pasted in the outerwall of the tank
• Main system is special sonar wave processingtechnology, using the SK Method to calculate the level value and outputof remote signal. Instrument can through the (4-20) mA analog signal, HART, RS-485, Ethernet, transfers the measurements to control center, meanwhile can through the Wi-Fi, Bluetooth, HART, RS-485, infrared, Ethernet debug the controller online
• Like the picture, measure the liquid level, the sonar wave signal from theprobe to launch out, after liquid level reflected, the probe detects echosignal
• Echo signal by proprietary algorithm to calculate the time (t), system can calculate the liquid level value according to the formula

Performance index:

• Measuring range:(0.2-3)m, (0.3-5)m, (0.4-10)m,(0.5-15)m, (0.6-20)m, (0.7-30)m, (0.8-50)m
• Preview resolution:1mm
• Repeatability in shorttime:1mm
• Measuring error:±1%FS
• Transfer volume:±100m
• Environmenttemperature in usinglevergauge:-20 to+70°C, -40 to+70°C
• Environment:-50 to+100°C and60 to330°C
• Ambient humidity:(0-100%) RH
• Explosion-proof sign:Exd II CT6, intrinsic safety
• Enclosure protectiongrade:IP65 andIP67
• Liquid level indication:6 128*64 liquid crystal display
• Dead zone:will show deadwhen liquid level in deadzone, the output will be 4mA in signal
• Electrical interface:M20*1.5
• Cable length fromprobe to main engine:5m, 10m, 15m, 20m, 25m and30m
• Weight of mainframe:2.9kg
• Size ofmainframe:217mm (length) * 160mm (width) * 185mm (height)
• Diameter of thebase hole in mainframe:6mm