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Flexim Clamp On Flow Meter Sizing: Portable Ultrasonic Non-Invasive Energy Sizing Systems
Quick Answer: Portable clamp on energy flow meter sizing starts with pipe outer diameter, wall thickness, material, liner, fluid type, temperature range, and minimum to maximum flow. Silver Instruments supplies a non invasive clamp on ultrasonic energy meter for DN15 to DN1200 pipes. Send those values plus return temperature for a same day quote.
Many engineers search for Flexim clamp on flow meter sizing because they need a fast energy check without cutting the pipe. Silver Instruments offers a compatible portable ultrasonic clamp on energy meter. The kit measures flow from outside the pipe and uses two PT100 temperature sensors on the supply and return lines. The meter calculates energy in kW or kBTU.
What Portable Clamp On Energy Sizing Actually Means
Sizing a clamp on energy meter is not the same as sizing an inline flow meter. You do not need flange ratings or process connections. You need to match the transducer frequency and mounting mode to the pipe and fluid. So the first step is a clean set of pipe data.
Here is the thing. In practice, most engineers skip the liner check. A lined pipe can reduce signal strength. A rubber lined DN200 pipe in a chemical plant in Vietnam can still work but you may need a lower frequency transducer. Silver Instruments checks the liner type before recommending a portable energy meter.
Pipe Data You Need For Sizing
Pipe outer diameter in mm. Wall thickness in mm. Pipe material such as carbon steel, stainless steel 304, copper, or HDPE. Liner material if any. Fluid type and approximate solids loading. Minimum and maximum flow in m3/h or kg/h. Supply and return temperatures in °C.
Do not send only nominal pipe size. A DN100 pipe can have several outer diameters depending on schedule. The clamp on transducer spacing changes with wall thickness. A wrong wall thickness shifts the flow reading by 1 to 3 percent on many sites.
Fluid Conditions That Change Sizing
Clean water is the easiest fluid for ultrasonic clamp on meters. But many energy systems run with treated water, glycol mixes, or hot water with small amounts of scale. Silver Instruments selects the transducer frequency based on fluid type and pipe condition.
For a 25 mm copper line with 30 percent glycol at 70 °C, a 2 MHz transducer pair works well. For a DN400 carbon steel line with 80 °C water, a 1 MHz pair gives better signal penetration. The specific heat capacity changes with glycol concentration. So include the glycol percentage when you ask for sizing.
Temperature Sensors And Energy Calculation
A portable clamp on energy meter needs two matched temperature sensors. We use PT100 sensors with a typical accuracy of ±0.1 °C. The meter subtracts the two temperatures and multiplies the result by the flow and the fluid heat capacity. The output is thermal power in kW or kBTU/h.
Some customers ask if they can use their existing building management system temperature sensors. Yes, if the sensors have a 4-20 mA signal or Modbus output. But energy accuracy depends on the temperature sensor pair. A 1 °C error on a 15 °C delta gives a 6.7 percent energy error. Most engineers ignore temperature pair accuracy. We check the pair on every energy sizing project.
Portable Meter Outputs And Data Logging
The portable unit runs on battery or 24 V DC. The meter logs flow, supply temperature, return temperatu
A customer in Australia checked two chiller lines in a hospital over five days. The pipe sizes were DN200 and DN250. The Silver Instruments portable meter logged energy data every minute. The data showed one chiller ran at 71 percent efficiency during part load. The specific detail helped the building team adjust the setpoint. A portable clamp on system works well for that kind of site check.
Recommended Portable Ultrasonic Energy Meter Models
Silver Instruments offers the SUP-1158P portable clamp on ultrasonic energy meter. The meter covers pipe sizes from DN15 to DN1200. The standard kit works on carbon steel, stainless steel, copper, and some HDPE pipes. Flow accuracy is ±1.0 percent of reading for pipes above DN50 with a clean fluid. Below DN50 the typical accuracy is ±2.0 percent of reading.
The kit includes two clamp on flow transducers, two PT100 clamp on temperature sensors, a portable display, and a carrying case. You can log data for up to 30 days. The unit works at process temperatures from -20 °C to 160 °C with the standard transducers.
Installation Notes That Affect Sizing
Clamp on transducers need a straight pipe section. For most energy meter checks, 10 diameters upstream and 5 diameters downstream is enough. If you have a control valve or two elbows close to the sensor location, we recommend a two path setup. Silver Instruments can advise after you send a simple site sketch or photo.
Pipe insulation must be removed at the sensor mounting area. The pipe surface needs a small amount of coupling gel. For high temperature pipes above 120 °C, use the high temperature mounting kit. The transducer cables are 5 m as standard. Longer cables up to 50 m are available.
How To Request A Solid Quote
Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range. Include the pipe material, wall thickness, and fluid type. For energy measurement, send the return temperature and the required output such as 4-20 mA HART or Modbus RTU. You can reach the Silver Instruments team at Tel: +86-25-68650347, Whatsapp: +86-25-52155837, or WeChat: +86 15365082610.
FAQ: Portable Ultrasonic Clamp On Energy Sizing
1. Which pipe sizes can a clamp on energy meter handle?
Silver Instruments portable clamp on energy meters cover DN15 to DN1200. Larger sizes are possible with a site test.
2. Can the meter measure both heating and cooling energy?
Yes. The meter calculates energy for hot water, chilled water, and glycol systems. Select the heating or cooling mode in the menu.
3. What accuracy can we expect on a portable clamp on system?
Flow accuracy is typically ±1.0 percent of reading for DN50 and larger clean fluid pipes. Below DN50 the figure is about ±2.0 percent depending on pipe condition.
4. Does the clamp on meter work on carbon steel and copper pipes?
Yes. Carbon steel, stainless steel, copper, and some plastic pipes work. Some HDPE and lined pipes need a lower frequency transducer. Send the pipe material and wall thickness for a proper check.
5. What information do you need for a fast price quote?
Send the pipe size, wall thickness, material, fluid type, flow range, supply and return temperatures, and required output. A one page data sheet is enough for a first budget price.
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