VEGAFLEX 81 – Guided Wave Radar Level Measurement In An Ammonia Receiving Tank

Published 14 Dec 2016

VEGA – World Leading Manufacturers Of Level & Pressure Sensors

VEGAFLEX81 level sensor provides a temperature operating range of -60 to 200°C and up to 75 metres measuring distance.

vega level sensors

VEGAFLEX 81

A large butchery requires the measurement of the level of ammonia in the storage room of its meat-packing facility. Level monitoring is required in the low-pressure receiving tank in the system.

The upper part of the tank contains ammonia vapour which is transformed into liquid form in the compressor before being pumped back into the tank.

When pumped back into the lower part of the tank the liquid ammonia passes through the cold storage room where it heats up and becomes ammonia vapour again. It rises to the top part of the tank and the cooling cycle begins again.

Monitoring the level of the liquid ammonia is particularly important for the operation of the system because if the liquid phase in the vessel gets too high, liquid ammonia would be sucked into the compressor, thereby causing serious damage.

The biggest challenges in this application arise from the special properties of ammonia, its relatively low dielectric constant and the process temperature of -30° C. In a gaseous state, ammonia can diffuse through standard industrial seals and destroy the electronics in the instrument housing within a very short time.

VEGAFLEX 81

The VEGAFLEX 81 level sensor is used to measure the ammonia effectively.

VEGA VEGAFLEX 81 is an intrinsically safe sensor which can be equipped with a borosilicate glass feedthrough (second line of defense) for ammonia applications. This feedthrough is gas tight and resistant to ammonia vapour.

The temperature range of the sensor, -60 … +150° C, matches the requirements perfectly. The coaxial measuring probe protects the borosilicate glass feedthrough and is ideal for liquids with a low dielectric constant.

The VEGAFLEX 81 guided radar level sensor can be used for all liquids including bitumen and liquefied gas. It can be used for storage containers, standpipes, in a metering tank or in tank farms. The VEGAFLEX 81 measures the level or interface (separation layers) of liquids with great reliability and accuracy.

VEGA Level Sensor – VEGAFLEX 81 Guided Wave Radar Level Sensor

VEGA VEGAFLEX 81 guided wave radar level transmitter is available in hazardous area options to meet ATEX & IECEx directives.

Approval C: ATEX II 1G, 1/2G, 2G Ex ia IIC T6
Approval D: ATEX II 1G, 1/2G, 2G Ex d ia IIC T6
Approval E: ATEX II 1G, 1/2G, 2G Ex d IIC T6
Approval R: ATEX II 1D, 1/2D, 2D, IP6x T
Approval C: IECEx ia IIC T6
Approval D: IECEx d ia IIC T6
Approval E: IECEx d IIC T6
Approval R: IEC IP6x T tD

For more information click: VEGA Guided Wave Radar Level Measurement

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