Bulk Ultrasonic Water Meter Stainless Steel body DN65 2 1/2″ R500

Experience ultimate precision with our DN65 (2 1/2″) Ultrasonic Water Meter. Featuring a durable stainless steel body and R500 range, it detects the lowest flow rates with zero mechanical wear. Its IP68-rated design ensures long-term reliability in harsh environments. Ideal for smart municipal supply and industrial billing where accuracy and hygiene are paramount.

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Technical Specifications

  • Dimensions

 (Unit: mm)

Nominal Diameter Pressure (MPa) Outside Diameter D Flange Hole D1 Sealing Surface D2 Sealing Surface f Flange Thickness C No. of Bolt Holes n Bolt Hole Diameter d Length L Height (Plastic Housing) H Height (Metal Housing) H Weight (kg)
DN50 1.0 / 1.6 / 2.5 Φ165 Φ125 Φ102 3 18 4 Φ18 200 250 266 11
DN65 1.0 / 1.6 Φ185 Φ145 Φ122 3 18 8 Φ18 200 282 303 11.8
2.5 22 8 Φ18
DN80 1.0 / 1.6 Φ200 Φ160 Φ138 3 20 8 Φ18 225 299 320 13.3
2.5 24 8 Φ18
DN100 1.0 / 1.6 Φ220 Φ180 Φ158 3 20 8 Φ18 250 315 336 16.0
2.5 Φ235 Φ190 Φ162 24 8 Φ22 322.5 343.5
DN125 1.0 / 1.6 Φ250 Φ210 Φ188 3 22 8 Φ18 250 340 361 19.3
2.5 Φ270 Φ220 Φ188 26 8 Φ26 350 371
DN150 1.0 / 1.6 Φ285 Φ240 Φ212 3 22 8 Φ22 300 370 391 26.5
2.5 Φ300 Φ250 Φ218 28 8 Φ26 377.5 398.5
DN200 1.0 / 1.6 Φ340 Φ295 Φ268 3 24 12 Φ22 350 412 433 35.4
2.5 Φ360 Φ310 Φ278 30 12 Φ26 422 443
DN250 1.0 / 1.6 Φ395 Φ350 Φ320 3 26 12 Φ22 450 476 497 57.2
2.5 Φ425 Φ370 Φ335 32 12 Φ30 491 512
DN300 1.0 / 1.6 Φ445 Φ400 Φ370 4 26 12 Φ22 500 544.5 559.5 81.6
2.5 Φ485 Φ430 Φ395 34 16 Φ30 564.5 579.5

Notes:

  1. Weight values are for reference only and are based on plastic housing with 1.6 MPa rated meter.
  2. Installation length L can be customized according to project requirements.
  • Metrological Performance
Parameter Unit / Symbol DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN250 DN300
Nominal diameter (DN) mm 50 65 80 100 125 150 200 250 300
inch 2″ 2½” 3″ 4″ 5″ 6″ 8″ 10″ 12″
Measurement range (R) Q₃/Q₁ 500/400 — — — — — — — —
Starting flow rate (Q₁) m³/h 0.009 0.014 0.024 0.036 0.057 0.088 0.127 0.227 0.353
Overload flow rate (Q₄) m³/h 50 78.75 125 200 312.5 500 787.5 1250 2000
Permanent flow rate (Q₃) m³/h 40 63 100 160 250 400 630 1000 1600
Transitional flow rate (Q₂) m³/h 0.128–0.160 0.202–0.252 0.320–0.400 0.512–0.640 0.800–1.000 1.280–1.600 2.020–2.520 3.200–4.000 5.120–6.400
Minimum flow rate (Q₁) m³/h 0.080–0.100 0.126–0.158 0.200–0.250 0.320–0.400 0.500–0.625 0.800–1.000 1.260–1.580 2.000–2.500 3.200–4.000
Fluid — Water, sewage, ≤30% homogeneous fluids
Working environment — Full pipe, –25°C to +55°C, ≤95% RH (non-condensing)
Maximum pressure MPa 1.0 / 1.6 / 2.5 (Default 1.6 MPa; DN200 default 1.0 MPa)
Pressure loss ΔP ΔP10 (or MAP ≤1.0 MPa / 1.6 MPa / 2.5 MPa)
Accuracy class — Class 2
EMC class — O,E2
Flow profile & installation class —  U0 D0 
Protection rating — IP68
Maximum temperature °C T50 (or T30/T90 depending on model)
Maximum cumulative flow m³ 99999999.9 m³ (9 digits)
Display range — Instantaneous: 0.0001–99999.9 m³/h Cumulative: 0.1–99999999.9 m³
Communication — RS485 / M-Bus (Baud rate: 2400/4800/9600 bps selectable, default 2400 bps) Protocol: EN13757 (M-Bus)
Power supply — Lithium battery 3.6 V ≥20 mAh (≥10 years continuous operation) Optional: DC 10–36 V, ≤20 mA
LCD Display — Upper: 9 digits (11.05 mm character height) Lower: 6 digits (8.5 mm character height)
Display content — Cumulative flow (m³), Instantaneous flow (m³/h or m³/min or L/s), Operating time (h), Date, Water temperature (°C), Fault code, Software version, Prompt messages
Data storage — EEPROM – stores cumulative volume & time Automatically records daily historical data for last 48 months Data retained ≥10 years during power failure

Notes:

  • For different Q₃ values or custom R ratios, please contact the DEAZESU team.
  • Some parameters (especially pressure ratings and Q₂ ranges) may have slight model-specific variations.
  • Accuracy Curve

  • Remote Transmission Optional

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