Transit Time Ultrasonic Flowmeter

EESIFLO Sonalok 7S

The EESIFLO Sonalok 7SZ range of non-invasive flowmeters utilises ultrasonic technology for the accurate flow measurement of liquids in full pipes. The field mounted flow transmitter can be configured via the keypad without any additional programming devices and is available as single channel unit. The measurement of flow is based on the principle that sound waves are influenced by a flowing medium.

Measurements are made by penetrating the pipe with ultrasound and subsequently time differences, frequency variations and phase shifts of the ultrasonic signals are evaluated. This measuring technique has no effect on the flowing liquid. There is no pressure loss in the pipe and no wear on components of the measuring device.

The ultrasonic sensors are clamped onto the outside of the pipe, thus eliminating the need to dismantle the pipework and interrupt the process. The EESIFLO Sonalok 7SZ can be applied to any type of standard pipe carrying clean or dirty liquids.

FEATURES

Ultrasonic flowmeter in IP 66 wall mounted enclosure
Easy to install clamp-on sensors with no process interruption
Non-invasive flow measurement of liquids, no pipeline disturbance, no pressure loss
Suitable for all commonly used pipe materials with pipe diameters from 10 mm to 2.5 m (1/2″ to 100″)

ADVANTAGES

Low installation effort and costs
Measurement is independent of fluid conductivity and pressure
No pressure loss, no possibility of leakage
Retrospective installation for existing plants possible
No cutting of pipes necessary, no interruption of process, no plant shut down
No additional fittings for maintenance required
Hygienic measurement, no risk of contamination, suitable for ultra clean liquids
No contact with medium, no risk of corrosion when used with aggressive media
Cost advantages when used with large diameter pipes, high pressure systems, etc.
Low stocking costs, nearly all pipe sizes are covered with only 2 types of sensors

SPECIFICATION

General

Measuring principle	Ultrasonic time difference correlation principle
Flow velocity range	0.01 … 25 m/s
Resolution	0.025 cm/s
Repeatibility	0.15 % of measured value ± 0.01 m/s
Accuracy	Volume flow ± 1 … 3 % of measured value depending on application, ± 0.5 % of measured value with process calibration Flow velocity ± 0.5 % of measured value
Turn down ratio	1/100
Gaseous and solid content of medium	< 10 % of volume

Flow transmitter

Enclosure	Wall mounted housing
Degree of protection	IP 66 according EN 60529
Operating temperature	-10 … 60 °C (14 … 140 °F)
Housing material	Aluminium, powder coated
Flow channels	1
Power supply	100 … 240 V AC or 18 … 36 V DC, specials upon request
Display	2 x 16 digit LCD, dot matrix, backlit
Dimensions	H 140 x W 190 x D 70 mm without cable glands
Weight	Approx. 1.5 kg
Power consumption	< 10 W
Signal damping	0 … 100 s, adjustable
Response time	1 s
Measuring cycle	100 … 1000 Hz, single channel
Operating languages	Selectable between Danish, English, German, French, Dutch, Norwegian, Polish, Czech, Turkish, Spanish

Quantity and units of measurement

Volumetric flow rate	m3/h, m3/min, m3/s, l/h, l/min, l/s, USgph (US gallons per hour), USgpm, USgps, bbl/d (barrels per day), bbl/min, bbl/s
Flow velocity	m/s, inch/s
Mass flow rate	g/s, t/h, kg/h, kg/min
Volume	m3, l, gal (US gallons), bbl
Mass	g, kg, t

Communication

Serial interface	RS 485 optional
Process outputs	Galvanically isolated from main electronics
Current	0/4 … 20 mA active (Rext < 500 ohm), 0.1 % of measued value ± 15 microAmp
Digital (pulse, status)	Totaliser value 0.01 … 1000 / unit, width 80 … 1000 ms, Open-Collector 24 V/4 mA

Large pipe transducers

Diameter range	50 … 2500 mm
Dimensions	60 x 30 x 34 mm
Material	Stainless steel
Temperature range	-30 … 80 °C (-22 … 176 °F) or -30 … 130 °C (-22 … 266 °F), higher temperatures upon request
Degree of protection	IP 65 acc. EN 60529, IP 67 or 68 optional
Cable lengths	10 m, 20 m, 50 m, special

Small pipe transducers

Diameter range	10 … 250 mm
Dimensions	43 x 18 x 22 mm
Material	Stainless steel
Temperature range	-30 … 80 °C (-22 … 176 °F) or -30 … 130 °C (-22 … 266 °F), higher temperatures upon request
Degree of protection	IP 65 acc. EN 60529, IP 67 or 68 optional
Cable lengths	10 m, 20 m, 50 m, special