Model Number: 439 Key Specifications/Special Features: Advantages:External level measurement with safetyOn point measuring and multi point measuringEasily installation, trial run and maintenanceVideo display and remote on the spotSonar technology

Work principle:

• Sonar pulse of the external liquid level switch can pass through thetank wall, pulse propagate in tank wall and liquid, then bereflected
• After detect and calculate about the reflective, it can showwhether there is the liquid or not
• Can send the signal to otherequipment to detect or control the liquid level

Performance index:

• Power: 24V DC
• Signal output:single point or two points measure is relay output, multiple point measure is (4-20)mA or relay output
• Relay capacity: (AC/DC 60V 0.5A) (220V AC 5A)
• Repeatabilityerror:±5mm
• Tank wallthickness:≤60mm (can be designed for the higher)
• Tank material: compact material like iron,stainless steel,glass,non-foamed plastic
• Materialmeasured:pure liquid,emulsionliquid and particulate suspension
• Environmenttemperature:-40 to80°C and-40 to150°C
• Environmenthumidity:0-100% RH
• Electricalinterfacespecification:M20x1.5
• Material:cast aluminum
• Protect grade:IP65,IP67
• Explosion-proofgrade:ExdII CT6
• Sensor (probe)
• Shell materials:stainless steel andcast aluminum
• Explosion-proofgrade:ExdII CT6