Hydrocarbon condensate/water interfaces are typical applications for this user-friendly transmitter with no moving parts. The 707 utilises the technology of TDR (Time Domain Reflectometry), sending high frequency pulses down a waveguide antenna (GWR probe). When the pulse reaches a liquid surface, part of the signal is reflected and level is accurately determined by means of a high speed timing circuit.
The remaining energy continues travelling down the probe until it reaches a higher dielectric liquid.
This pulse will once more be reflected and measured by the timing circuit.
By measuring the time of both reflections and the compensation of the speed of travel through the upper liquid layer, both upper liquid level and the liquid-liquid interface level can be accurately determined.
The Eclipse 707 delivers a 4-20mA output (per NAMUR NE 43) for the liquid interface level and via HART digital signal for both levels.
Via a HART module interface the unit can deliver multiple 4-20mA and relays outputs.
The user will find the same menu structure as for the popular 705 series.
This turns the new 707 into a user-friendly device in spite of a much more complex measuring algorithm.
With interface capability on board, Eclipse is now able to service the widest range of application in the industry.
Applications may range from high viscosity, up to 10,000 cP, temperature up to 400C, saturated steam applications up to 110 bar in boilers, high pressure up to 345 bar, liquefied gases down to a permittivity of 1.4, extremely aggressive or ultra-clean applications.
