Eleven instruments compared on the specifications that actually decide the purchase: pipe range, accuracy, transducer temperature, battery life, ingress protection, logging and price. Transit-time and Doppler are compared in separate tables, because their accuracy specifications are not measured the same way. Every figure is taken from the manufacturer's published datasheet and dated.
The portable clamp-on ultrasonic flow meters most often specified in North America split into two groups by measurement principle. The transit-time instruments are the Panametrics TransPort PT900, Badger Meter Dynasonics DXN-5P, Fuji Electric Portaflow-C FSC-4, Ultraflux UF801-P, Ultraflux Minisonic II P, Katronic KATflow 200, Micronics Portaflow 330, Greyline PTFM 6.1 and METRI Ultra ProLite. The Doppler instruments are the Compu-Flow C6 Portable and Greyline PDFM 6.1. The Dynasonics DXN-5P is a hybrid and appears in both groups.
These two groups are not interchangeable and their accuracy figures are not comparable. Transit-time needs a clean acoustic path and is specified on reading. Doppler needs suspended solids or bubbles to reflect from and is specified either on reading or on full scale depending on manufacturer. Choose the principle first, then the instrument.
| Meter | Measurement principle | Pipe size range | Accuracy | Transducer temperature | Battery life | Ingress protection | Price |
|---|---|---|---|---|---|---|---|
| Panametrics PT900 Panametrics (Baker Hughes) | Correlation transit-time, clamp-on | 0.5 to 24 in (15 to 600 mm) standard; to 300 in (7,500 mm) on request | ±1% of reading on pipe ≥ 2 in (50 mm); ±2% of reading on 0.5 to under 2 in | −40 to +150 °C standard; −200 to +400 °C optional | 18–20 h continuous; over 4 days in power-saver | Consult datasheet | Quote only — configurator, no published list price |
| Dynasonics DXN-5P Badger Meter | Hybrid — transit-time and Doppler, auto-selected; plus liquid thermal energy | 0.5 in and larger; to 120 in (3,050 mm) with DTTL large-pipe transducers | Transit-time ±1% of reading or ±0.01 ft/s, whichever greater. Doppler 2% of full scale. Repeatability ±0.1% of reading. | −40 to +90 °C (DTTSU/DTTL); −40 to +121 °C (DTTR); −40 to +176 °C (DTTH high-temp) | 6–9 h continuous on 11.1 V 75 Wh Li-ion | Water and dust resistant (no IP rating published) | Quote only — no published list price |
| Fuji Portaflow-C FSC-4 Fuji Electric | Ultrasonic transit-time, clamp-on, DSP | 13 to 6,000 mm (0.5 to 236 in) for flow rate; 40 to 1,000 mm for velocity profile | ±1.0%; response within 1 second | −40 to +200 °C | 12 h continuous, 3 h recharge | Consult datasheet | Quote only — no published list price |
| Ultraflux UF801-P we supply Ultraflux | Ultrasonic transit-time, clamp-on | 0.5 in to 390 in (13 mm to 9,900 mm) | Typically 1–2%; up to ±0.5% with field calibration | Per transducer selection; consult application data | Up to two months using sleep function | Field-rated case; consult datasheet | From $9,999 (published) |
| Ultraflux Minisonic II P we supply Ultraflux | Ultrasonic transit-time, clamp-on, bi-directional | DN10 to DN10,000 (0.5 in to 393 in) | Up to ±0.5% | Per transducer selection; consult application data | Consult datasheet | IP68 | From $8,999 (published) |
| Katronic KATflow 200 Katronic | Ultrasonic transit-time difference, clamp-on | 10 to 6,500 mm (DN10–DN6500) | Volume flow ±1 to 3% of measured value depending on application; ±0.5% with process calibration. Repeatability 0.15%. | −30 to +250 °C | Up to 24 h on standard NiMH AA cells | IP65 with rubber shock protector; IP67 transport case | Quote only — no published list price |
| Micronics Portaflow 330 Micronics | Ultrasonic transit-time, DSP, 50 ps sampling resolution | 13 to 5,000 mm OD (A: 13–115 mm, B: 50–2,000 mm, D: 1,500–5,000 mm) | ±0.5 to ±2% of reading above 0.2 m/s on ID over 75 mm; ±3% on ID 13–75 mm; ±6% below 0.2 m/s. Repeatability ±0.5% or ±0.02 m/s. | −20 to +135 °C (A and B); −20 to +80 °C (D); −20 to +200 °C hi-temp option | Up to 20 h continuous, rechargeable | IP67 carry case; IP68 transducer option | PF333 energy variant listed at £4,562.76 ex-VAT by RS (approx. $5,800), July 2026 |
| Greyline PTFM 6.1 Pulsar Measurement (Greyline) | Ultrasonic transit-time, clamp-on | 15 to 1,200 mm (0.5 to 48 in) nominal across three transducer sets | ±1% of reading or ±0.0046 m/s (±0.015 ft/s), whichever greater. Repeatability and linearity ±0.25%. | −40 to +150 °C | Up to 15 h continuous on internal lithium polymer | IP67 with transducer cables connected (IP65 without); IP67 carry case | Quote only — no published list price |
| METRI Ultra ProLite we supply METRI | Ultrasonic transit-time, clamp-on | 10 mm to 2,000 mm (DN10–DN2000) | ±0.5% of measured value (system); ±1–3% on site depending on application | −30 to +80 °C | Up to 12 h on one 9V PP3 | IP54 (transducers IP50, IP68 optional) | From $3,999 (published) |
Every figure above is taken from the manufacturer's own published documentation on the revision noted. Specifications change without notice; confirm against the current datasheet before purchase.
Four questions separate a $4,000 portable from a $12,000 one. If you answer no to all four, the value tier will do the job and the premium instrument is a waste of budget.
Four noes means clean water or glycol, schedule-standard steel or plastic pipe, moderate size, occasional use, and ±2% is fine. That is most HVAC balancing, most pump verification and most municipal spot-checking, and it is well inside the value tier.
| Meter | Velocity range | Fluids | Wall thickness gauge | Data logging | Energy / BTU | Outputs | Origin |
|---|---|---|---|---|---|---|---|
| Panametrics PT900 Panametrics (Baker Hughes) | Consult transducer selection | Acoustically conductive liquids, including clean liquids and many with small amounts of entrained solids or gas | Yes — available as an accessory | On tablet; export by email | Yes — optional energy kit | 4–20 mA out, 2× 4–20 mA in, pulse/frequency/alarm, Modbus RS485, Bluetooth, micro-USB | United States |
| Dynasonics DXN-5P Badger Meter | To 40 ft/s (12 m/s) both modes; sensitivity 0.001 ft/s | Liquid-dominant, acoustically conductive — clean liquids in transit-time mode, solids or gas-bearing liquids in Doppler mode | Yes — compatible gauge, ±0.03 in | Over 300 sites in 1 GB, USB download | Yes — 2× PT1000 RTD inputs, −50 to +200 °C | 4–20 mA, 0–5/0–10 V in and out, open-collector pulse, Modbus TCP/IP, USB, Ethernet | United States |
| Fuji Portaflow-C FSC-4 Fuji Electric | 0 to ±0.3 … ±32 m/s | Uniform liquid propagating ultrasound, turbidity 10,000 mg/L or less, full pipe, developed turbulent or laminar flow | Sound velocity measuring function for unknown materials | SD memory card, USB to PC | Yes — heat quantity measurement function | USB, SD card | Japan |
| Ultraflux UF801-P we supply Ultraflux | Detects velocity as low as ±0.03 ft/s (0.009 m/s) | Clean liquids with minor aeration under 5% — water, wastewater, corrosive chemicals, fuels, oils | Optional | Built-in multi-parameter logger | Yes — optional energy kit (BTU, kW, thermal audit) | Logger download; energy kit I/O | France |
| Ultraflux Minisonic II P we supply Ultraflux | Consult datasheet for transducer-specific range | Water and all homogeneous liquids — fuel, oils, glycol, corrosive chemicals, DI and ultrapure water | Optional | Built-in logger with USB output | Consult configuration | USB logger download | France |
| Katronic KATflow 200 Katronic | 0.01 to 25 m/s, resolution 0.25 mm/s, 1:100 turndown | Acoustically conductive liquids in full pipes | Yes — optional WTG probe, auto-detected | 100,000 measurement points with KAT Data software | Not on the 200 — heat quantity is a KATflow 230 option | RS-232 with USB cable and software | United Kingdom / Germany |
| Micronics Portaflow 330 Micronics | 0.1 to 20 m/s bi-directional, Reynolds-corrected across the range | Sonic-conducting liquids in full pipes | Not integral | 200,000 point logger with software | On PF333 only — EN 1434 section 6 heat/energy | Isolated 0/4–20 mA, RS232/USB, programmable pulse 2–500 ms or frequency | United Kingdom |
| Greyline PTFM 6.1 Pulsar Measurement (Greyline) | ±0.03 to 12.2 m/s (±0.1 to 40 ft/s) | Clean fluids in full pipes, typically under 2% by volume solids or bubbles; also low-solids wastewater or sludge | Not integral | 12 million points, CSV or Logger Software format, intervals 10 s to 1 h | No | USB-C flash drive export; USB-C expansion port for future I/O | United Kingdom / Canada |
| METRI Ultra ProLite we supply METRI | 0.01 to 25 m/s, 100:1 turndown | Clean liquids, full pipe. Gas or solids below 10% by volume. | Yes — optional probe, 2 to 24 mm | 4 MB internal, USB transfer | Yes, with known inlet and outlet temperatures | USB | Designed and manufactured in the United Kingdom |
Transit-time and Doppler measure different things and their accuracy specifications are not written on the same basis. Comparing a Doppler meter's ±2% against a transit-time meter's ±1% and concluding the transit-time instrument is better is a category error — on raw sludge the transit-time meter reads nothing at all.
The Greyline PDFM 6.1 specifies ±2% of reading, the Compu-Flow C6 Portable specifies ±1% as a function of flow profile, and the Dynasonics DXN-5P in Doppler mode specifies 2% of full scale. That last one matters: 2% of full scale on a meter ranged to 12 m/s is ±0.24 m/s regardless of what you are reading, so at 1 m/s it is effectively 24% of reading. Full-scale and of-reading specifications cannot be put in the same column honestly.
The PDFM 6.1 states the threshold explicitly: solids or bubbles of at least 100 microns, at a minimum concentration of 75 ppm. Below that there is nothing to return an echo and the instrument has no reading to give. Point a Doppler meter at clean filtered water and it fails, which is the exact mirror image of pointing a transit-time meter at sludge.
This is the underrated advantage. A transit-time instrument needs pipe material, wall thickness, liner type and liner thickness entered correctly, and a 1 mm wall thickness error on a 50 mm pipe puts roughly 4% of area error into the result. The PDFM 6.1 needs none of that — clamp on the single head, enter the internal diameter, read flow. On a pipe with unknown provenance that is a meaningful accuracy advantage in practice, whatever the datasheets say.
| Meter | Measurement principle | Pipe size range | Accuracy | Transducer temperature | Battery life | Ingress protection | Price |
|---|---|---|---|---|---|---|---|
| Compu-Flow C6 Portable we supply Compu-Flow | Ultrasonic Doppler, clamp-on | 0.5 in to 500 in ID (12 mm to 12,000 mm) | ±1% (a function of flow profile); linearity ±0.5%, repeatability ±0.1% | −30 to +90 °C; to +250 °C with special fittings | AC or DC, solar or battery powered | Transducer IP68 submersible to 200 ft; display NEMA 4X / IP64 | From $6,990 (published) |
| Greyline PDFM 6.1 Pulsar Measurement (Greyline) | Ultrasonic Doppler, clamp-on, single-head | 12.7 mm to 4.6 m ID (0.5 in to 15 ft) | ±2% of reading or 0.03 m/s, whichever greater. Repeatability ±0.1%, linearity ±0.5%. | −40 to +150 °C | Up to 15 h continuous; sleep mode extends to weeks of interval logging | IP67 electronics with cables connected; transducer IP68 to 10 psi for 24 h; IP67 carry case | Quote only — no published list price |
| Dynasonics DXN-5P Badger Meter | Hybrid — transit-time and Doppler, auto-selected; plus liquid thermal energy | 0.5 in and larger; to 120 in (3,050 mm) with DTTL large-pipe transducers | Transit-time ±1% of reading or ±0.01 ft/s, whichever greater. Doppler 2% of full scale. Repeatability ±0.1% of reading. | −40 to +90 °C (DTTSU/DTTL); −40 to +121 °C (DTTR); −40 to +176 °C (DTTH high-temp) | 6–9 h continuous on 11.1 V 75 Wh Li-ion | Water and dust resistant (no IP rating published) | Quote only — no published list price |
Every figure above is taken from the manufacturer's own published documentation on the revision noted. Specifications change without notice; confirm against the current datasheet before purchase.
Each entry states what the instrument is genuinely good at and where it loses to something else on this page. Instruments Seztec supplies are marked; see the disclosure at the foot of the page.
Panametrics (Baker Hughes)
Tablet-driven portable with Bluetooth, correlation transit-time processing and the broadest transducer temperature range here.
Supersedes TransPort PT878 (retired).
Hydrocarbon and refinery work, and sites already standardised on Panametrics transducers.
Accuracy halves to ±2% below 2 in. pipe, and the Android tablet interface is one more device to charge and keep alive on site.
Badger Meter
The only true hybrid here — transit-time and Doppler in one instrument, auto-selected on signal quality, plus RTD energy inputs.
Supersedes Dynasonics TFXP (legacy portable).
Plants where the fluid changes from clean to dirty across the survey and you cannot carry two instruments.
Shortest battery life in this group at 6–9 hours, and Doppler mode is specified on full scale rather than on reading.
Fuji Electric
Widest fluid temperature range in the group at −40 to +200 °C, with a flow velocity profile measurement function most portables do not offer.
Supersedes Portaflow-C FSC-3.
Hot process lines, and any job where you need to see the velocity profile rather than trust that it is developed.
Turbidity ceiling of 10,000 mg/L means it stops at moderately dirty, and there is no Doppler fallback.
Ultraflux
A survey-grade portable with DSP processing, automatic Reynolds correction, built-in logger and an optional BTU energy kit.
Billable flow surveys and energy audits where the data record has to survive being questioned.
Costs roughly two and a half times the value tier, and you are paying for the data record as much as the reading.
Ultraflux
The widest pipe range in this comparison — 0.5 in to 393 in — with IP68 protection and on-screen echo visualisation.
Fleets that have to cover both half-inch lab lines and thirty-foot raw water mains with one instrument.
Transit-time only. It cannot read sludge, slurry or heavily aerated streams at any price.
Katronic
A 650-gram one-handed hand-held that runs 24 hours on AA cells you can buy at any hardware store.
Confined spaces, working at height, and remote sites where a proprietary battery pack going flat ends the day.
Single channel and a three-line LCD. There is no waveform display and no colour graphing to argue from.
Micronics
The most honest accuracy specification in this comparison — Micronics publishes exactly how much accuracy it loses on small pipe and at low velocity.
Water utility and building services survey work, and buyers who want a published price rather than a quote process.
Minimum velocity of 0.1 m/s, and accuracy degrades to ±3% under 75 mm ID and ±6% below 0.2 m/s.
Pulsar Measurement (Greyline)
IP67 aluminium enclosure, 12-million-point logger and a USB-C expansion port, at the cost of the narrowest pipe range in this comparison.
North American water and wastewater survey work in the 2 to 48 in range, in weather.
Stops at 48 in (1,200 mm). If your plant has a 60 in raw water main, this instrument cannot measure it at any configuration.
Compu-Flow
A portable clamp-on Doppler meter for the fluids transit-time cannot see — sludge, slurry, raw wastewater and aerated streams.
Dirty-fluid work where every transit-time instrument on this page will simply fail to lock on.
Doppler needs solids or bubbles to reflect from. On clean water it is the wrong instrument.
Pulsar Measurement (Greyline)
A single-head clamp-on Doppler portable that needs no pipe material, wall thickness or liner data entered — clamp it on, enter the internal diameter, read flow.
Raw sewage, sludge, produced water, pulp stock and dense slurry, in weather, where pipe data is unknown or unreliable.
±2% of reading against the Compu-Flow C6's ±1%, and 15 hours of battery against the C6's mains, DC, solar or battery flexibility.
METRI
A 230-gram transit-time clamp-on flow meter covering DN10 to DN2000, with a signal oscilloscope and integral wall thickness gauge.
Equipping a whole team, or getting serious capability without a five-figure line item.
IP54 only, and the 80 °C transducer ceiling rules out steam condensate and hot thermal oil lines.
A published ±1% figure is a laboratory number measured on ideal pipe with a known wall thickness and fully developed flow. Real installed uncertainty on clamp-on ultrasonic is more often 2 to 5%, and every instrument on this page is subject to the same physics.
Micronics is the only manufacturer in this comparison that publishes the degradation openly: the Portaflow 330 is specified at ±0.5 to ±2% of reading above 0.2 m/s, but ±6% of reading below 0.2 m/s. That is not a Micronics weakness. It is what happens to every transit-time instrument at low flow, and most datasheets simply decline to state it. If your line runs at 0.15 m/s, no instrument on this page will give you 1%.
The Panametrics PT900 is specified at ±1% of reading on pipe of 2 in and above, and ±2% on 0.5 in to under 2 in. Micronics publishes ±3% for pipe ID between 13 and 75 mm. The transducer separation gets short relative to the wavelength, and the timing difference you are trying to resolve shrinks. Small-bore clamp-on is genuinely harder, and the premium instruments do not escape it either — they just document it.
Volumetric flow is velocity multiplied by cross-sectional area, and area is derived from the internal diameter you type in. Get wall thickness wrong by 1 mm on a 50 mm pipe and you have introduced roughly 4% of area error before the instrument has measured anything. This is why an integral or bundled wall thickness gauge matters more than the last half percent of quoted accuracy. The METRI Ultra ProLite, Katronic KATflow 200, Panametrics PT900 and Dynasonics DXN-5P all support one. Budget for it even where it is optional.
Generic imported handhelds sold on marketplaces for $300 to $900 use the same transit-time physics as the instruments above and will produce a plausible-looking number on clean water in standard steel pipe. What you lose is signal diagnostics, calibration traceability, transducer breadth and support.
The practical failure mode is not that they read wrong. It is that you cannot tell when they are reading wrong. The instruments in the table above give you signal strength, gain, quality index or a raw waveform, so a bad reading announces itself. A unit with no diagnostics returns the same confident three decimal places whether the transducers are coupled properly or not.
They are reasonable for a hobbyist, an irrigation check, or a rough indication where being 10% out costs nothing. They are not reasonable for anything you will bill for, defend, or make a capital decision on. And they are not reasonable on thick-wall, lined, or large-bore pipe, where they will typically fail to acquire at all.
Rent instead. A week's rental of a survey-grade portable costs less than a cheap instrument and gives you a number you can actually stand behind. Rental from Houston, shipped nationwide →
Published accuracy is effectively tied. The Panametrics PT900, Badger Dynasonics DXN-5P, Fuji Portaflow-C FSC-4 and Greyline PTFM 6.1 all specify ±1% of reading, while the Katronic KATflow 200, Micronics Portaflow 330, METRI Ultra ProLite and both Ultraflux instruments reach ±0.5% after process or field calibration.
Choosing on the headline accuracy number is a mistake, because installed uncertainty is dominated by pipe data entry, transducer placement, flow profile development and signal quality — not by the electronics. A ±0.5% instrument on a pipe with an assumed wall thickness is less accurate than a ±2% instrument on a pipe that has been gauged.
The specification worth comparing is the calibrated figure and what it takes to get there. Field calibration against a reference gives roughly half a percent on most of these instruments. Without it, plan for 2 to 5% in real conditions.
The Ultraflux Minisonic II P covers DN10 to DN10,000, or 0.5 in to 393 in, which is the widest range in this comparison. The Katronic KATflow 200 reaches 6,500 mm, the Fuji Portaflow-C FSC-4 reaches 6,000 mm and the Micronics Portaflow 330 reaches 5,000 mm.
At the other end, the Greyline PTFM 6.1 stops at 1,200 mm (48 in) and the Badger Dynasonics DXN-5P stops at 3,050 mm (120 in) with large-pipe transducers. Neither is a defect — both are sized for the North American water and building services market where 48 in covers the great majority of lines.
Range is only real if you buy the transducers. Almost every wide-range figure on this page assumes a multi-transducer set. A single standard transducer pair typically covers something like 50 mm to 2,000 mm, and the extremes cost extra.
Doppler or hybrid instruments only. The Compu-Flow C6 Portable and Greyline PDFM 6.1 are both clamp-on Doppler and need suspended solids or entrained gas to reflect from. The Badger Dynasonics DXN-5P runs transit-time and Doppler in one instrument and switches automatically on signal quality.
Every other instrument in this comparison is transit-time only. Transit-time needs a clear acoustic path through the fluid; suspended solids and entrained gas scatter the beam and the instrument loses lock. Published tolerance is roughly 2% by volume for the Greyline PTFM 6.1, under 5% aeration for the Ultraflux UF801-P and under 10% for the METRI Ultra ProLite.
The Greyline PDFM 6.1 publishes the Doppler threshold from the other direction: it needs solids or bubbles of at least 100 microns at 75 ppm minimum concentration. Between those two limits — too dirty for transit-time, too clean for Doppler — there is a genuine gap, and a hybrid is the only single-instrument answer.
The Compu-Flow C6 Portable specifies ±1% against the Greyline PDFM 6.1's ±2% of reading, and covers pipe to 500 in against the PDFM's 15 ft. The PDFM 6.1 counters with an IP67 aluminium enclosure, a 12-million-point logger and sleep-mode logging that runs for weeks.
Power is the practical separator. The Compu-Flow C6 runs on AC, DC, solar or battery, which suits a permanent or semi-permanent deployment on a tailings or sludge line. The PDFM 6.1 runs 15 hours continuous on its internal pack and is built around being carried.
Both need the same thing from the fluid: reflectors. Neither will read clean filtered water.
The Panametrics PT900 leads with optional transducers rated to +400 °C, against a +150 °C standard set. The Katronic KATflow 200 reaches +250 °C, the Fuji Portaflow-C FSC-4 and Micronics Portaflow 330 both reach +200 °C, and the Badger Dynasonics DXN-5P reaches +176 °C with its DTTH high-temperature transducers.
The METRI Ultra ProLite stops at +80 °C, which rules it out on steam condensate, hot thermal oil and most high-temperature process lines. That is the clearest capability gap between the value tier and the premium tier on this page, and it is not something a firmware update or a better operator can work around.
Temperature ratings are per transducer, not per instrument. Check which transducer set is actually in the quote — the headline figure on a datasheet is usually the optional high-temperature option, priced separately.
For continuous logging the Ultraflux UF801-P leads at up to two months using its sleep function. Among conventional handhelds the Katronic KATflow 200 runs 24 hours on standard NiMH AA cells, the Micronics Portaflow 330 runs 20 hours, the Panametrics PT900 runs 18 to 20 hours and the Badger Dynasonics DXN-5P runs 6 to 9 hours.
The KATflow 200's AA cells are worth more than the raw hours suggest. Every other instrument here uses a proprietary internal pack, so a flat battery on a remote site ends the day. AA cells can be bought at a filling station.
The DXN-5P's shorter runtime is the price of a 7-inch colour touchscreen and hybrid operation. On mains or vehicle power it runs indefinitely, so this matters for spot-checking on foot rather than for parked survey work.
Published prices in this comparison run from $3,999 for the METRI Ultra ProLite to $9,999 for the Ultraflux UF801-P. Most premium manufacturers do not publish list prices at all — the Panametrics PT900, Badger Dynasonics DXN-5P, Fuji Portaflow-C FSC-4, Katronic KATflow 200 and Greyline PTFM 6.1 are all quote-only, configured by transducer set.
One useful public data point: RS Components lists the Micronics Portaflow PF333 energy variant at £4,562.76 excluding VAT, roughly $5,800 as of July 2026. That sits about where the mid tier lands once a transducer set is included.
The number on the quote is rarely the number you pay. Transducer sets, high-temperature options, wall thickness gauges, energy or BTU kits, extended cables and calibration certificates are all separately priced, and a fully configured premium portable commonly lands well above the base instrument price.
The Dynasonics TFXP is the legacy Badger Meter portable, introduced in 2006, and has been superseded by the Dynasonics DXN-5P hybrid. Buyers searching for a TFXP replacement are generally routed to the DXN-5P, which adds Doppler operation, RTD energy inputs and a 1 GB logger.
The same generational shift happened at Panametrics: the TransPort PT878 was retired and replaced by the TransPort PT900. If you are comparing against an older quote or an existing instrument in your own toolroom, check which generation the specification refers to — accuracy and interface both changed.
Existing TFXP transducers are not interchangeable with DXN transducer sets. Budget for the full kit rather than assuming a transmitter-only upgrade.
Rent when the measurement is a one-off, when the job is a single survey with a defined end date, or when the pipe is outside the range of the instrument already owned. Buy when portable flow measurement is recurring work, typically more than three or four deployments a year, at which point purchase costs less than repeat rental.
Renting also solves the transducer problem. A rental kit arrives with the transducer set matched to the pipe, which is exactly the part buyers most often under-specify when purchasing.
Seztec rents survey-grade portable clamp-on flow meters from Houston and ships nationwide. If renting is the right answer for your job, we will say so rather than sell you an instrument you will use twice. Rental details →
Seztec USA supplies four of the eleven instruments compared on this page: the METRI Ultra ProLite, Ultraflux UF801-P, Ultraflux Minisonic II P and Compu-Flow C6 Portable. Those four are marked in the tables. The remaining seven — Panametrics, Badger Meter, Fuji Electric, Katronic, Micronics and Pulsar Measurement (Greyline) — are competing products we do not sell and have no commercial relationship with.
Every specification in the tables above is taken from the named manufacturer's own published datasheet or product page, at the revision listed under each table, and was verified on 25 July 2026. Where a manufacturer does not publish a figure, the cell reads “consult datasheet” rather than being filled with an estimate. Where a manufacturer does not publish a price, the price column says so; we have not estimated competitor pricing.
Product names and trademarks referenced on this page are the property of their respective owners and are used for identification and comparison only. No endorsement or affiliation is implied. Specifications change without notice — confirm against the current datasheet before purchase.
Found an error in a specification above? Tell us and we will correct it and re-date the page: sales@clamponflowmeter.com
Send the pipe sizes, materials, wall thicknesses and fluids you need to survey. We will tell you which instruments on this page can actually do the job — including the ones we do not sell — and whether renting makes more sense than buying.
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