e-1 e wall mount ultrasonic flowmeter for clean liquids fdt-21w u accuracy 1% u repeatability 0.2% u positive, negative and net totalizer u 4-line lcd display u clamp on transducers u rs232 output fdt-21w ultrasonic fowmeter is designed to measure the fuid velocity of liquid in a full/closed pipe. it is a measurement system which is both easy to install and use. the fdt-21w operates according to the difference in the transit time of fight measured, and determines the fow velocity by measuring the travel time of a pulse from one transducer to the next. flow in the same direction takes less time to travel to the second transducer than does fow in the opposite direction. electroacoustic transducers receive and emit brief ultrasonic pulses through the liquid of the pipe. transducers are vertically placed at both sides of the measured pipe. sensors are placed on the pipe and fastened by means of a clamp. the display will quickly show the fow velocity. the fdt-21w can be used for metallic, plastic and rubber tubes. specifi cations accuracy: 1% of reading >(0.2 m/s) 0.6 ft/s repeatability: 0.2% linearity: 0.5% response time: 0 to 999 seconds (user confgured) velocity: (0.01 to 30 m/s) 0.03 to 105 ft/s bi-directional temperature range: standard: 0 to 70oc (32 to 158of) with high temp transducers: 0 to 160oc (32 to 320of) pipe size: dn 20 to 100 mm (0.75 to 4") standard [up to dn 6000 mm (236") with optional transducers] transducer frequency: 1 mhz rate units (user confgured): meter, feet, cubic meter, cubic feet, usa gallon, oil barrel, usa liquid barrel, imperial liquid barrel, million usa gallons totalizer: 7-digit totals for positive, negative and net fow liquid types: most liquids including clean water, sea water, waste water, chemical liquids, oil, crude oil, alcohol, beer, and more suspension concentration: 20,000 ppm (may contain very small amounts of air bubbles) pipe material: all metals, most plastics and fberglass security: programmable lock-out code display: 4 x 16 english letters power: 85 to 264 vac communications: rs232c (baud rate from 75 to 115,200 bps) transducer cable length: 5 m (15') data logger: built-in, stores over 2000 lines of data totalizer/calibration: 7-digit press-to-go for calibration housing: abs plastic with aluminum alloy protective carrying case case: nema 4 (ip65) dimensions: 100 h x 66 w x 20 mm d (3.9 x 2.6 x 0.8") weight: 514 g (1.2 lb) e fdt-21w shown smaller than actual size. fdt-21w inside view.
e-2 model no. description weight g (oz) pipe size mm (inch ) fdt-21-s1 replacement small pipe standard transducer 75 (2.6) 20 to 100 (0.75 to 4) fdt-21-s1h replacement small pipe high temperature transducer 94 (3.3) 20 to 100 (0.75 to 4) fdt-21-hs small pipe aluminum transducer 250 (8.8) 20 to 100 (0.75 to 4) fdt-21-hm medium pipe aluminum transducer 1080 (38) 50 to 700 (2 to 28) fdt-21-m1 medium pipe standard transducer 250 (8.8) 50 to 700 (2 to 28) fdt-21-m1h medium pipe high temperature transducer 150 (5.3) 50 to 700 (2 to 28) fdt-21-l1 large pipe standard transducer 650 (23) 300 to 6000 (12 to 236) FDT-21-GREASE-S1 replacement acoustic gel for standard transducers FDT-21-GREASE-S1h replacement acoustic gel for high-temperature transducers to order visit omega.com/fdt21w for pricing and details model no. description fdt-21w wall mount transit-time ultrasonic flowmeter (includes s1 and s1h transducers) accessories ordering example: fdt-21w, wall mount transit-time ultrasonic flowmeter. parameters hs-type hm-type s1-type m1-type l1-type s1h-type m1h-type pipe size (mm) 20 to 100dn 50 to 100dn 20 to 100dn 50 to 700dn 300 to 6000dn 20 to 100dn 50 to 700dn pipe size (inch ) 3?? to 4 2 to 28 3?? to 4 2 to 28 12 to 240 3?? to 4 2 to 28 material aluminum alloy abs special high-temperature materials frequency 1 mhz calibration calibrate with the main unit magnetism magnetic non-magnetic temperature 0 to 70c (32 to 158f) 0 to 160c (32 to 320f) protection class nema 4 ( ip65) dimensions (mm) 200 x 25 x 25 280 x 40 x 40 45 x 30 x 30 60 x 45 x 45 80 x 70 x 55 90 x 85 x 24 90 x 82 x 29 weight g (oz) 250 (8.8) 1080 (38) 75 (2.6) 250 (8.8) 650 (23) 94 (3.3) 150 (5.3) liquid types fresh water, salt water, chemical liquids, oil, crude oil, alcohol, beer, etc. suspension concentration 20,000 ppm, may contain very small amount of air bubbles pipe material all metals, most plastics, fiberglass, etc. dedicated shielded standard length 5 meter x 2, can be extended to 10 meter x 2 or 15 meter x 2 transducer cable comes complete with small pipe standard and high temperature transducers (s1 and s1h), acoustic gel, tape measure, rs232 cable, transducer cable, tranducer clamps, alan wrench, terminal lugs, shrink tubing and operators manual. FDT-21-GREASE-S1 and FDT-21-GREASE-S1h acoustic gel fdt-21-s1 and fdt-21-s1h tranducers fdt-21w-tc tranducer clamps alan wrench fdt-21w-sl terminal lugs fdt-21w-tube shrink tubing all models shown smaller than actual size. accessories included
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