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Clampon Flow Meter: Fixed Transit Array Hardware Procurement Options
Quick Answer: Clampon flow meter fixed transit array hardware procurement starts with pipe data. Buyers should specify pipe outside diameter, wall thickness, material, fluid temperature and hazardous area certification before requesting a price. A standard package covers two sensors, mounting rail, couplant, cables and transmitter.
Procurement teams in Indonesia, Saudi Arabia, Chile, Nigeria and Vietnam ask similar questions. The first thing we ask is not flow range. It is pipe schedule. Wall thickness changes the acoustic path and sensor frequency. A DN150 schedule 40 carbon steel pipe is different from a DN150 HDPE pipe. Most engineers skip this part. Here is the thing. If the wall thickness is wrong, the signal may not reach the second sensor.
What Fixed Transit Array Hardware Includes
A fixed transit array is not portable. The sensors stay installed on the pipe with a stainless steel rail or chain. A standard package from Silver Automation Instruments includes two ultrasonic sensors, a fixed mounting bracket, couplant, a wall mount transmitter and shielded cables. For DN300 and above we add a second sensor pair for dual path measurement. Dual path increases accuracy where flow profile distortion is common.
We supply sensor cables from 5 m to 50 m. For desert water pipelines in the Middle East, long cables are common because the transmitter sits in an air conditioned panel room. In marine and offshore jobs, buyers choose 316 stainless steel brackets and IP66 or IP67 sensor bodies. In chemical plants, PTFE lined pipes need a special couplant and a lower frequency sensor.
Procurement Options by Pipe Size and Material
Small pipes from DN15 to DN40 use W mode. DN50 to DN300 pipes use V mode. DN350 to DN1200 pipes use Z mode with higher power transducers. Above DN1200 we recommend a dual path high power clamp-on meter.
Carbon steel, 304 stainless steel, 316 stainless steel, PVC, HDPE and cast iron are supported. State the liner type if the pipe is lined with rubber, PTFE or cement. Lined pipes need lower frequency sensors. A 1 MHz sensor works for clean liquids on small metal pipes. A 0.5 MHz sensor is better for large HDPE or concrete pipes and liquids with small particles. This meter is not a good fit for sludge with more than 3 percent solids.
Temperature, Hazardous Area and Signal Output Choices
Standard clamp-on sensors handle fluid temperatures from -40 °C to 120 °C. For heat transfer oil or hot water above 120 °C choose high temperature sensors rated to 180 °C. In a palm oil refinery in Malaysia we supplied a DN80 fixed transit array on a thermal oil line running at 165 °C. The mounting rail and couplant were selected for continuous high temperature exposure.
For oil and gas projects in Saudi Arabia, UAE, Oman and Qatar specify ATEX Zone 1 or Zone 2 and IECEx at the quote stage. Certification is not retrofitted. For water plants in Australia and New Zealand most buyers ask for IP67, AS/NZS compliance and 4-20 mA HART output. For chemical distribution in Latin America Modbus RTU on RS485 is common because the meter connects to a PLC.
Signal output options include 4-20 mA HART, Modbus RTU, pulse and two relay outputs. Chilled water energy projects add PT1
Pricing, Lead Time and Freight Factors
Price depends on path count, sensor temperature rating, hazardous area certification, cable length and transmitter type. A DN100 standard kit with 10 m cables costs less than a DN800 dual path high temperature version with ATEX Zone 1 sensors and 50 m cables. We do not publish a single price list because the combinations are too wide.
Lead time for standard DN50 to DN300 fixed transit array hardware is 5 to 15 working days. High temperature sensors and Zone 1 versions add 7 to 10 working days. Freight to Jakarta, Dammam, Lagos, Valparaiso or Brisbane depends on DHL Express or sea freight. DHL is faster for one or two units. Sea freight works better for distributors ordering 10 or more sets.
Installation Hardware and Spare Parts
Fixed transit array hardware needs stable geometry. The sensor spacing must not shift after commissioning. We supply stainless steel straps, magnetic mounting rails or welded brackets. For permanent installations on stainless steel pipes welded pads are sometimes used. For temporary trials magnetic rails are faster. But a fixed procurement should not rely on temporary magnets in a production line.
We keep stock of silicone couplant, high temperature grease, solid couplant pads, cable glands and replacement sensors. A cement plant in Vietnam ordered spare couplant pads and stainless straps at the same time as the flow meter. That site runs 24 hours and cannot wait for a small consumable part.
FAQ: Fixed Transit Array Procurement Questions
Q1. What is a fixed transit array clamp-on flow meter?
A fixed transit array clamp-on flow meter uses ultrasonic sensors mounted outside the pipe. The sensors stay in a fixed position on a rail or bracket. The transmitter calculates flow from transit time difference.
Q2. Can a clamp-on meter handle dirty water or chemicals?
It works with liquids that have small amounts of suspended solids or bubbles. Too much aeration or thick sludge blocks the signal. Send us the fluid type and solids content before you order.
Q3. What pipe sizes does Silver Automation Instruments support?
We cover DN15 to DN3000. Small pipes use W mode. Large pipes use Z mode or dual path. We ask for outside diameter and wall thickness for every quote.
Q4. Do you supply replacement sensors for existing clamp-on meters?
Yes. We can match sensor frequency, cable length and connector type if you send the old sensor photo, transmitter nameplate and pipe data. We also supply couplant and mounting rails.
Q5. What information do you need for a fixed transit array quote?
Send us fluid type, pressure (bar), temperature (°C), pipe size (DN), pipe material, wall thickness and flow range. We will reply with a recommended sensor frequency, path configuration and price.
Send your pressure (bar), temperature (°C), pipe size (DN), pipe material, wall thickness and flow range to Silver Automation Instruments. Contact Tel: +86-25-68650347, WhatsApp: +86-25-52155837 or WeChat: +86 15365082610. Website: flow-meter.com.au
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