±1 mm accuracy National approvals (NMi, PTB) for custody transfer Applicable as standalone system or tied into tank gauging systems via the 4590 Tank Side Monitor Easy on-site operation via menu-driven alphanumeric display Easy commissioning, documentation and maintenance via operating software (ToF tool) Cost-effective installation via 4-wire cable with HART and 24 V DC power supply (intrinsically safe) on tank roof Gas-tight process connection (second line of defense) available for any antenna version