Clamp-On ATEX Ultrasonic Flowmeter KATflow 170 Katronic For Marine

Katronic Flowmeter Type KATflow 170
Katronic Flowmeter Type KATflow 170

Clamp-On ATEX, IECEx and EAC-Ex Ultrasonic Flowmeter


For applications where harsh environmental conditions demand a more rugged instrument, the KATflow 170 provides a corrosion-resistant option as part of a fully ex-certified package. The flowmeter is intended for permanent operation in Zone 1 and 2 hazardous areas and is an economical choice for a variety of metering applications. The KATflow 170 demonstrates that even the most complex technical requirements can be met with straightforward solutions.

The KATflow 170 flowmeter is designed around a choice of explosion-proof housings available in either offshore industry compliant epoxy-coated copper-free aluminium, or stainless steel. The instrument is extremely easy to use and is programmed with a magnetic pen and a glass-fronted keypad for increased safety. The robustness and reliability of the KATflow 170 is further enhanced by its encapsulated IP 68 transducers which are manufactured from stainless steel and have a sturdy cable conduit.

Katronic Flowmeter Type KATflow 170-1
Katronic Flowmeter Type KATflow 170-1


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.

ATEX PT100 transducer fixed to pipe with KATflow 170
ATEX PT100 transducer fixed to pipe with KATflow 170


  • Dual flow monitoring with sumaveragedifference and maximum calculations
  • IP 68 stainless steel sensors as standard
  • Optional current inputs for pressure, temperature and density compensation
  • Up to 100,000 measurement data logger and software for sampling and data transfer
  • Process output options current, open-collector, relay
  • Ex-certified Pt 100 probe for temperature compensation
KATflow 170 in operation and KATflow 170 with aluminium enclosure
KATflow 170 in operation and KATflow 170 with aluminium enclosure


  • Pipe diameter range 10 mm to 3,000 mm
  • Temperature range for sensors -50 °C to +115 °C (-58 °F to +239 °F), higher temperatures available on request
  • Robust IP 66 unit with LCD display and glass-fronted keypad
  • Epoxy-coated aluminium or stainless steel enclosure
  • Magnetic pen for safe and easy programming
  • Measurement of two flows simultaneously


  • Suitable for installation in hazardous areas
  • Dual flow monitoring with sum, average, difference and maximum calculations
  • IP 68 stainless steel sensors as standard
  • Process output options including current, open-collector, relay
  • Communication options RS 485, Modbus RTU, Profibus PA and HART* compatible output
  • ATEX-certified PT100 probe for temperature compensation


  • Optional sound velocity output function
  • Stainless steel bracket for either pipe or wall mounting
  •  KATdata+ software for data evaluation


  •  Produced water measurements
  • Methanol and water injection systems
  • Product and interface detection systems
  • Measurement of refined products
  • Tanker unloading systems
  • Oil blending skids


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 (standard), 90 ms   (optional)
Damping of displayed value0 … 99 s (selectable   by user)
Gaseous and solid content of liquid media< 10 % of volume


Enclosure typeExplosion-proof field housing, pipe mounted
Degree of protectionIP 66   according to EN 60529
Operating temperature-20 … +60 °C (-4 … +140 °F)
Housing materialCopper-free   aluminium, polyurethane and epoxy-coated, stainless steel (optional)
Protection conceptFlame-proof (d),   increased safety (e)
Ex-certification codeI I 2G Ex de I IB T6
Ex-certification numberEPS   11 ATEX 1355 X
Measurement channels1 or 2
Calculation functionsAverage, difference, sum, maximum (dual-channel use   only)
Power supply100   … 240 V, AC 50/60 Hz
9 … 36 V DC
Special solutions on request
DisplayLCD graphic display,   128 x 64 dots, backlit
Dimensions270   (h) x 140 (w) x 280 (d) mm
(without cable glands and mounting support)
Cable glandsPower   supply: M 20 x 1.5
Process inputs/outputs: 2 x M   20 x 1.5 Communication: M 20 x 1.5
Sensors: 2 x M 20 x 1.5
WeightApprox.   4.0 kg
Power consumption< 10 W
Operating languagesEnglish, French, German, Dutch, Spanish, I talian, Russian,   Czech, Turkish, Romanian (others on request)
TypeRS   485 (optional), Modbus RTU (optional), HART* compatible output, Profibus PA   (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: -50 …   +250 °C (-58 … +482 °F), resolution: 0.1 K, accuracy: ±0.2 K
Current0/4   … 20 mA active or 0/4 … 20 mA passive, U = 30 V, Ri = 50 Ω,   accuracy: 0.1 % of measured value
Process outputs (galvanically isolated)
Current0/4 …   20 mA active/passive (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 relay2 x Form A SPST (NO   and NC), U = 48 V, I max = 250   mA
Voltage0 … 10 V, RLoad = 1000 Ω
Frequency2 Hz … 10 kHz, 24   V/4 mA
HART* compatible0/4   … 20 mA, 24 V DC, RGND = 220   Ω





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