A 230-gram transit-time clamp-on flow meter covering DN10 to DN2000, with a signal oscilloscope. Big-brand portables start above $10,000. This is $3,999.
SKU SZ00ICLUPL24 · FROM $3,999
You want serious capability without a five-figure line item — or you are equipping a whole team.
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.
METRI publishes two numbers, and the honesty is the point:
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 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 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.
Designed and manufactured in the UK by METRI, an iCenta Controls company. ISO 9001 certified.
| Measurement principle | Ultrasonic transit-time, clamp-on |
|---|---|
| Pipe size range | 10 mm to 2,000 mm (DN10–DN2000) |
| Accuracy | ±0.5% of measured value (system); ±1–3% on site depending on application |
| Velocity range | 0.01 to 25 m/s, 100:1 turndown |
| Fluids | Clean liquids, full pipe. Gas or solids below 10% by volume. |
| Transducer temperature | −30 to +80 °C |
| Wall thickness gauge | Yes — optional probe, 2 to 24 mm |
| Data logging | 4 MB internal, USB transfer |
| Energy / BTU | Yes, with known inlet and outlet temperatures |
| Battery life | Up to 12 h on one 9V PP3 |
| Ingress protection | IP54 (transducers IP50, IP68 optional) |
| Instrument weight | 230 g including battery |
| Outputs | USB |
| Origin | Designed and manufactured in the United Kingdom |
| Price | From $3,999 (published) |
| Sensor | Pipe size | Notes |
|---|---|---|
UPL-1MHz-IP50 | 25 – 1200 mm | 1 MHz sensors, IP50 (no ingress protection) |
UPL-1MHz-IP68 High Performance | 500 mm and greater | 1 MHz sensors, IP68 (waterproof to 5 m) |
UPL-4MHz-IP50 | 10 – 100 mm | 4 MHz sensors, IP50 (no ingress protection) |
UPL-4MHz-IP68 | 10 – 100 mm | 4 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.
The METRI Ultra ProLite covers 10 mm to 2,000 mm (DN10 to DN2000) with the standard transducer set. Below DN25 the transducer separation becomes short relative to wavelength, so expect the wider end of the ±1–3% on-site accuracy band on small-bore lines.
Above DN2000 you are outside the instrument's range and want the Ultraflux Minisonic II P, which reaches DN10,000. Below DN10, clamp-on transit-time is not the right technology at all.
The METRI Ultra ProLite transducers are rated −30 to +80 °C at the pipe wall. That covers chilled water, condenser water, potable water and most HVAC service, but rules out steam condensate, hot thermal oil and high-temperature process lines.
For pipe wall temperatures above 80 °C, the Panametrics PT900 with optional high-temperature transducers reaches +400 °C and the Katronic KATflow 200 reaches +250 °C. See the portable comparison for the full temperature ranking.
Three things: the +80 °C transducer ceiling, IP54 rather than IP67 or IP68 protection, and a 4 MB logger against the 12 million points offered by the Greyline PTFM 6.1. Accuracy is not one of them — the ProLite specifies ±0.5% system accuracy, matching the premium tier.
What you gain is a 230-gram instrument that fits in a jacket pocket, a signal oscilloscope that shows the raw waveform rather than a signal-strength bar, and a price that lets you equip a whole team rather than one technician.
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.
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