CLAMP-ON FLOW METER by Seztec USA +1 (832) 899-4040
Portable · Transit-time · METRI

METRI Ultra ProLite Portable Flow Meter

A 230-gram transit-time clamp-on flow meter covering DN10 to DN2000, with a signal oscilloscope and an integral wall thickness gauge. Big-brand portables start above $10,000. This is $3,999.

SKU SZ00ICLUPL24 ·  FROM $3,999

  • From $3,999 — premium accuracy at a fraction of big-brand price
  • 230 g including battery, 185 × 85 × 25 mm. It fits in a jacket pocket.
  • ±0.5% system accuracy, 0.15% repeatability, 100:1 turndown
  • Signal oscilloscope — see the raw waveform, not just a signal-strength bar
  • Integral wall thickness gauge (2–24 mm) kills the biggest source of systematic error

Buy this one if…

You want serious capability without a five-figure line item — or you are equipping a whole team.

The instrument that changes who can carry one

The Ultra ProLite weighs 230 grams including the battery. That is a phone with a thick case. Not a briefcase, not a shoulder bag, not a cart.

Weight is not a vanity spec in this business. The reason flow surveys get skipped is that the instrument lives in a locked cabinet and getting it out is a whole exercise. An instrument light enough to live in a technician's bag is an instrument that actually gets used on the pipe he happened to be standing next to. And at $3,999 — against big-brand portables that start above $10,000 — you can put one in the hands of several technicians rather than rationing one across a department.

Read the accuracy spec properly

METRI publishes two numbers, and the honesty is the point:

  • System accuracy: better than ±0.5% of measured value. The instrument, on a good pipe, installed correctly.
  • On-site accuracy: ±1–3%, depending on application. The real world.

Most vendors publish the first and let you discover the second yourself. The gap is entirely installation: straight run, pipe wall condition, and the accuracy of the dimensions you typed in. Repeatability is 0.15%, which is what actually matters for trending and for comparing one reading against another on the same pipe.

The signal oscilloscope

The ProLite shows you the raw received waveform. Most instruments in this price class give you a signal-strength bar; the ProLite gives you the trace. When a reading misbehaves, the waveform tells you why — a weak direct signal, a reflection off a liner, or acoustic noise from a nearby valve. This is a diagnostic tool that normally appears three price tiers up.

The wall thickness gauge quietly fixes the biggest error

The meter computes volumetric flow from velocity and cross-sectional area, and it takes the area from the pipe dimensions you enter. Enter a wall thickness from a spec table when the pipe has thirty years of corrosion and scale on it, and every reading is systematically wrong — precisely, confidently, repeatably wrong.

With the optional probe the ProLite measures the wall it is actually sitting on. It is the highest-leverage sixty seconds in the whole procedure.

Made in Britain

Designed and manufactured in the UK by METRI, an iCenta Controls company. ISO 9001 certified.

TechnologyUltrasonic transit-time, clamp-on (non-invasive)
Pipe size10 mm to 2000 mm (DN10–DN2000)
ApplicationAny clean fluid, full pipe. Gas/solids <10% by volume.
Flow range0.01 to 25 m/s
Resolution0.25 mm/s
Measurement rate1 Hz standard
Repeatability0.15% of measured value
AccuracySystem accuracy better than ±0.5% of measured value. On-site accuracy ±1–3% depending on application.
Turndown ratio100:1
Data loggingBuilt-in 4 MB datalogger, USB transfer
Dimensions185 × 85 × 25 mm
Weight230 g including PP3 battery
ProtectionIP54 enclosure
Display128 × 68 pixel graphic display, backlit
Keypad17 keys with audio feedback
Battery lifeUp to 12 hours continuous on a single 9V PP3
Transducer materialStainless steel and PEEK
Transducer temperature−30 to +80 °C
Transducer ratingIP50 standard, IP68 optional
Transducer cable1.5 m
Wall thickness gauging2 to 24 mm using optional wall thickness gauge probe
Configurations storedUp to 12 measurement points
DiagnosticsSignal oscilloscope for sensor positioning; full instrument and measurement diagnostics
Heat / BTUHeat quantity measurement if inlet and outlet temperatures are known
Supplied withMain unit, sensors, cables, coupling gel, tape measure, clamping rail, USB external battery, micro-USB connector, 3× PP3 batteries, hard carry case
OriginDesigned and manufactured in the United Kingdom
PriceFrom $3,999 (big-brand portables typically start above $10,000)

Transducer options

SensorPipe sizeNotes
UPL-1MHz-IP5025 – 1200 mm1 MHz sensors, IP50 (no ingress protection)
UPL-1MHz-IP68 High Performance500 mm and greater1 MHz sensors, IP68 (waterproof to 5 m)
UPL-4MHz-IP5010 – 100 mm4 MHz sensors, IP50 (no ingress protection)
UPL-4MHz-IP6810 – 100 mm4 MHz sensors, IP68 (waterproof to 5 m)

Frequency must match pipe size — low frequency penetrates further, high frequency resolves better on small bores. Specify pipe size when ordering.

Specifications transcribed from the manufacturer datasheet and subject to change. Confirm against the controlling document before specifying — Seztec will send it to you on request.

This instrument is specified into the following industries. Each page covers the specific measurement problems, the fluids involved, and what usually goes wrong.

Is this the right instrument for your line?

Send us pipe size, pipe material, wall thickness, lining, fluid, and how much straight run you have. A Seztec application engineer will confirm the fit — or tell you it is the wrong instrument, which happens and which we would rather say before you buy.

Request a quote