Portable Clamp-On Ultrasonic Flowmeter Type KATflow 230

KATflow 230 in operation
KATflow 230 in operation


The KATflow 230 is easily portable but incorporates an advanced specification for situations which require comprehensive measurement features coupled with easy operation. The flowmeter has two measurement channels, which allow it to monitor two pipes simul-taneously or to improve accuracy in non-ideal conditions. The  KATflow 230 can also be supplied with a vari- ety of options to meet the most diverse application requirements.

KATflow 230, Portable Clamp-On Ultrasonic Flowmeter
KATflow 230, Portable Clamp-On Ultrasonic Flowmeter


The KATflow non-invasive flowmeters work on the transit time ultrasonic principle. This involves sending and receiving ultrasonic pulses from a pair of sensors and examining the time difference in the signal. Katronic uses clamp-on transducers that are mounted externally on the surface of the pipe and which generate pulses that pass through the pipe wall. The flowing liquid within causes time differences in the ultrasonic signals, which are then evaluated by the flowmeter to produce an accurate flow measurement.

The key principle of the method applied is that sound waves travelling with the flow will move faster than those travelling against it. The difference in the transit time of these signals is proportional to the flow velocity of the liquid and consequently the flow rate.

Since elements such as flow profile, type of liquid and pipe material will have an effect on the measurement, the flowmeter compensates for and adapts to changes in the medium in order to provide reliable results. The instruments can be used in a variety of locations, from measurements on submarines to installations on systems destined for use in space, and on process flu ids as different as purified water in the pharmaceutical sector and toxic chemical effluent. The flowmeters will operate on various pipe materials and diameters over a range of 10 mm to 6,500 mm.


• Pipe diameter range 10 mm to 6,500 mm
• Temperature range for sensors : -30 °C to +250 °C (-22 °F to +482 °F)
• Robust IP 65 aluminium enclosure
• Selectable three-line LCD display and fu ll keypad
• Battery life up to 24 hours with easily replaceable battery cartridge
• Measurement of two flows simultaneously.


• Dual flow monitoring with sum, average, difference and maximum calculations
• PT100 inputs for heat quantity (thermal energy) measurement
• Process output options including current, open-collector, relay
• Large data logger and software for sampling and data transfer
• Stainless steel sensors, cable and connectors as standard.


• Available with crush-proof IP 67 transport case or lightweight soft case
• Expansion box for additional input or output configuration and special solutions
• Optional pipe wall thickness gauge
• Special waterproof solution available for harsh environmental conditions
• KATdata+ software for data evaluation.


• Heating, Ventilation and Air Conditioning (HVAC) measurements
• Large pipe measurement with two sensor pairs in ‘X’ configuration
• Temporary replacement of conventional in-line flowmeters
• Building surveys on large facilities
• Efficiency monitoring of heat exchangers.

KATflow 230, Portable Clamp-On Ultrasonic Flowmeter
KATflow 230, Portable Clamp-On Ultrasonic Flowmeter



Measurement principleUltrasonic transit-time difference
Flow velocity range0.01 … 25 m/s
Resolution0.25 mm/s
Repeatability0.15 % of measured value, ±0.015 m/s
AccuracyVolume flow:
±1 … 3 % of measured value depending on application
±0.5 % of measured value with process calibration Flow velocity (mean):
±0.5 % of measured value
Turn down ratio1/100 (equivalent to 0.25 … 25 m/s)
Measurement rate100 Hz (standard)
Response time1 s
Damping of displayed value0 … 99 s (selectable by user)
Gaseous and solid content of liquid media< 10 % of volume


Enclosure typePortable
Degree of protectionIP 65   according to EN 60529
Operating temperature-10   … +60 °C (+14 … +140 °F)
Housing materialExtruded   aluminium, AI MG Si 0.5, lids die-cast zinc alloy GD-Zn AL 4 CU 1
Measurement channels1 or 2
Calculation functionsAverage, difference, sum, maximum (dual-channel use   only)
Power supplyInternal rechargeable   batteries: 8 x NiMH AA 2850 mAh
Power adapter: 100 … 240 V AC input, 9 V DC output
External battery pack: 12 V 105 Ah, 25 kg (optional)
Operating timeUp to 24 h with fu   lly charged internal batteries
DisplayLCD   graphic display, 128 x 64 dots, backlit
Dimensions266   (h) x 168 (w) x 37 (d) mm
WeightApprox.   2.0 kg
Power consumption< 5 W
Operating languagesEnglish, French, German, Dutch, Spanish, I talian, Russian,   Czech, Turkish, Romanian (others on request)


TypeRS 232 , USB cable (optional)
Transmitted dataMeasured and totalised value,   parameter set and configuration, logged data

Internal Data Logger 

Storage capacityApprox. 30,000 measurements (each comprising up to   10 selectable measurement units), logger size 5 MB
Approx. 100,000 measurements   (each comprising up to 10 selectable measurement units), logger size 16 MB
Logged dataAll measured and   totalised values, parameter sets

KATdata software

FunctionalityDownload of measured values/parameter sets,   graphical presentation, list format, export to third party software, online   transfer of measured data
Operating systemsWindows   8, 7, Vista, XP, NT, 2000 Linux

Quantity and units of measurement

Volumetric flow ratem3/h, m3/min, m3/s, l/h, l/min, l/s
USgal/h   (US gallons per hour), USgal/min, USgal/s bbl/d (barrels per day), bbl/h,   bbl/min
Flow velocitym/s,   ft/s, inch/s
Mass flow rateg/s, t/h,   kg/h, kg/min
Volumem3, l, gal (US gallons),   bbl
Massg, kg, t
Heat flowW, kW, MW (with heat   quantity measurement option)
Heat quantityJ,   kJ, kW/h (with heat quantity measurement option)
Temperature°C (with heat   quantity measurement option)

Process inputs (galvanically isolated)

TemperaturePT100 (clamp-on sensors), three- or four-wire   circuit, measurement range: -30 … +250 °C (-22 … +482 °F), resolution:   0.1 K, accuracy: ±0.2 K (two or four inputs available)

Proceess outputs*(galvanically isolated)

Current0/4 … 20 mA active (RLoad < 500 Ω), 16 bit resolution, U = 30 V,   accuracy: 0.1 %
Digital open-collectorValue:   0.01 … 1000/unit, width: 1 … 990 ms, U = 24 V, I max = 4 mA
Digital relayForm   A SPST (NO), U = 48 V, I max =   250 mA


Pipe diameter range50 … 3,000 mm for type K1N/E
50 … 6,500 mm for type K1L
Dimensions of sensor heads60   (h) x 30 (w) x 34 (d) mm
Material of sensor headsStainless steel
Material of cable conduitsType   K1L : PVC
Type   K1N/E: Stainless steel
Temperature rangeType   K1L: -30 … +80 °C (-22 … +176 °F)
Type   K1N : -30 … +130 °C (-22 … +266 °F)
Type   K1E : -30 … +250 °C (-22 … +482 °F)
(for short periods up to +300 °C (+572°F))
Degree of protectionIP 66   according to EN 60529 (I P 67 and IP 68 on request)
Standard cable lengthsType   K1L: 5.0 m
Type K1N/E:    4.0 m





Read more : KATflow 200, Hand-Held Clamp-On Ultrasonic Flowmeter

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