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Flexim Portable Ultrasonic Flow Meter: Field Liquid Testing Inspection Kits
Quick Answer: The Flexim portable ultrasonic flow meter kit lets you measure liquid flow in minutes without cutting pipes or stopping processes. It clamps onto the outside of DN15 to DN6000 lines and delivers readings accurate to ±0.3%. Engineers use these kits for pump audits, leak detection, and commissioning checks across water treatment, chemical dosing, and oil transfer systems.
Why You Need a Portable Inspection Kit on Site
We have seen this on customer sites many times. A fixed flow meter drifts out of spec, or a new pump installation needs flow verification, and there is no spare port. That is exactly where a clamp-on kit saves hours. Instead of welding flanges or tapping into a pressurised pipe, your team can strap the transducers onto the pipe and get live readings within one minute. This matters most in remote mining camps in Western Australia or desalination plants in the Middle East where downtime costs run into thousands of dollars per hour.
The Flexim kit comes in a rugged IP67 hard case with everything pre-wired. You get a pair of clamp-on transducers, mounting fixtures, coupling gel, and a handheld transmitter with a colour display. Some kits also include a wall charger and a car adapter for fieldwork in places with no mains power.
What Fits Inside a Typical Field Kit
A standard Silver Instruments Flexim portable kit includes these items, but we always ask for your pipe schedule before shipping, so we select the right transducer frequency.
The transmitter unit weighs less than 2 kg and runs on rechargeable batteries that last up to 14 hours. It logs data at 1 Hz and stores up to 100,000 readings. You can export CSV files via USB, which is handy for pump efficiency reports. The transducers use a stainless steel bracket secured with ratchet straps or chains. For large pipes above DN200, we supply the wider bracket and damping magnets to reduce ambient vibration.
Inside the case you will also find a PT100 clamp-on temperature sensor, because the meter calculates heat flow rate when you need thermal energy measurements. Output options include 4-20 mA HART, pulse, and Modbus RTU. Many chemical plants in Vietnam use the HART output to connect directly to their DCS during a 72-hour plant trial.
Where Engineers Use These Kits Most
Our customers in Southeast Asia, the Middle East, and Latin America use Flexim portable meters for five recurring jobs. The first is pump validation. One process engineer in a Saudi Arabian desalination plant told us he checks high-pressure RO feed pumps every quarter with the same kit, comparing real flow against the VFD speed reference. The second is balancing flow in chilled water loops. A building maintenance team in Singapore uses it on DN80 and DN100 pipes without draining the system. The third is spot-checking well injection rates in onshore oilfields. The fourth is verifying municipal water meters in small towns where the municipality suspects under-registration. The fifth is troubleshooting flow-related batch quality issues in food and beverage plants, like a dairy in Chile that found a 4% discrepancy in milk intake just by clamping the meter onto the CIP return line.
Pipe Compatibility and Liquid Types
The kit works on metal and plastic pipes, including carbon steel, stainless steel, copper, PVC, PE, and GRP. Lined pipes need a slightly different transducer configuration, so we ask for the liner material and thickness before quoting. The liquid can be clean water, wastewater, glycol, light oils, acids, alkalis, or de
Most field measurements happen on pipes from DN25 to DN300 because that is the range of process headers and pump suction lines. We have sold kits for DN600 cooling water mains, but those jobs require two people to mount the larger transducers safely.
Accuracy and On-Site Repeatability
Under straight-run conditions of 10D upstream and 5D downstream, the portable meter reaches ±0.3% of reading. In cramped pump rooms where you only have 3D straight run, the error can increase to ±1%. In practice, most engineers accept ±1% for a field spot check, because it still tells them if a meter has drifted by 5% or more. One contractor in Peru checks his own magnetometer against a Flexim kit before each custody transfer run, and his repeatability stays within 0.2% batch to batch.
Common Questions We Receive
Q: How long does it take to set up the kit on a 6-inch pipe?
A: About 3 minutes from case to first reading, once your technician has done it three or four times. The pre-programmed pipe database inside the transmitter already has common pipe materials and liners loaded, so you select the option and the meter calculates the transducer spacing automatically.
Q: Can I use the same kit for both portable spot checks and temporary 24/7 monitoring?
A: Yes. The Flexim portable will run for two weeks continuously on its own battery if you disable the backlight, or indefinitely with the supplied mains adapter. Many customers rent a kit from us for a two-week plant audit and return it after collecting the CSV data. Others buy the kit outright and keep it in their maintenance workshop.
Q: Does coupling gel dry out in high ambient temperatures?
A: In the Middle East during summer, the standard gel can dry after six hours at 45 °C. We supply a high-temperature coupling grease for applications above 80 °C pipe surface, which lasts 24 hours without reapplication. For permanent installations, we recommend coupling pads.
Q: Is the kit hazardous area approved?
A: Standard kits are not ATEX or IECEx rated, but Silver Instruments can supply a Zone 2 version with an intrinsically safe transmitter and certified transducers. If you need Zone 1, tell us before ordering so we configure the exact part number and certification paperwork.
Q: What flow range can the portable meter measure?
A: It depends on pipe size and liquid. On a DN50 water pipe, it can measure from 0.01 m/s to 25 m/s, which translates to roughly 0.1 m³/h to 230 m³/h. On large wastewater pipes, the low-end sensitivity is around 0.03 m/s. We recommend sending us your flow range, pipe DN, and liquid type for a specific feasibility check.
How to Request a Quote
Tell us your pipe size (DN), material, wall thickness, liquid type, temperature in °C, and the flow range you want to verify. We will reply with a complete kit part number, lead time, and shipping cost to your site. Reach our technical sales team directly:
Tel: +86-25-68650347
WhatsApp: +86-25-52155837
WeChat: +86 15365082610
We ship Flexim portable ultrasonic flow meter inspection kits to industrial end users and distributors in Australia, the UAE, Saudi Arabia, Vietnam, Indonesia, Chile, Peru, Nigeria, and across the broader Australasia, Middle East, Southeast Asia, Africa, and Latin America regions.
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