Two-Wire Capacitance Level Transmitter (TLC)

Operating Principle :

• TLC2 probe surface forms a capacitance with the walls of tank containing the liquid
• Level sensing probe gets divided into three parts - Stray capacitance Cstray Air part forming Cair Liquid part forming Cliq
• When level increases, Cliq increase, Cair falls while Cstray stays constant as probe/device is held at fixed location with respect to the tank.
• While, with level decreasing, Cair increaeses while Cliq falls, so in effect measuring capacitance provides information about liquid level in the tank. Software inside the device holds the higher and lower calibration values, and provides level information on the device output

Features :

• Fast Switching Response
• High temperature endurable probes
• Single sensor allows pump-control & multi-point switching
• Easy calibration with or without material
• Remote electronics with std 10 meters cable length
• External indication LED available
• Threaded , Flanged Mountings & TC
• Electronic Inserts support all requirements
• Ingress protection : IP 68/65 (as per IS-13947)
• Ex-proof (Ex d T6 IP-66 IIC)
  
  • Flameproof as per IS/IEC 60079-1:2007
  • Weatherproof (IP-66) as per IS/IEC 60529:2001
  • Suitable for Gas Group : IIC
  • Suitable for Zone 1 & 2 atmospheres

• Compact size
• Rigid rod / flexible rope versions
• No potentiometers - hassle free calibration compensation against material build-up

Applications :

• Free flowing homogeneous liquids like oil, raw water, WFI, DM/DI water etc
• Suitable for top mounting
• Process temperature max. 200°C
• Process pressure max. 20 bar