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Contact a Customer Care Representative

We’ll get back to you within 24 hours or the following business day.

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Customer Care representatives are available by phone Monday–Friday, from 9am–5pm CST.

For sales & general inquiries
Municipal water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010

For product support
Municipal water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010

Contact a Customer Care Representative

We’ll get back to you within 24 hours or the following business day.

Prefer to call?
Customer Care representatives are available by phone Monday–Friday, from 9am–5pm CST.

For sales & general inquiries
Municipal water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010

For product support
Municipal water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010

SDI Series Flow Sensor

The SDI Series flow sensor offers unparalleled performance for liquid flow measurement in closed pipe systems in an easy-to-install economical package. Impeller sensors offer a quick response to changes in flow rate and are well suited to flow control and batch type applications in addition to flow monitoring. The new four-bladed impeller design is rugged, non-fouling and does not require custom calibration.

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  • Size
    68...914 mm
    1-1/2...36 in.
  • Temperature Range
    –10…65 °C
    14...150 °F
  • Flow Range
    0.3…6.1 m/sec
    1...20 ft/sec
  • Pressure Range
    Up to 68 bar
    Up to 1000 PSI
  • Accuracy
    ±1.0%
    ±1.0%
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Rugged, non-fouling. No custom calibration required.

Intended for general clean liquid flow measurement applications.

  • Single direction powered insert with raw, scaled pulse and analog output
  • Bi-directional powered insert with analog and scaled pulse output
  • Battery powered insert with a local and remote display and scaled pulse output


Product Specifications

View & Configure CAD/BIM Drawings Download CSI Specifications
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  • Operating Temperature
    Electronics –10…65 °C
    LCD –20…65 °C
    Electronics 14…150 °F
    LCD –4…150 °F
  • Maximum Pressure Rating Stainless Steel (Non Shock)
    1000 psi (68.9 bar) @ 70° F (21° C)
    900 psi (62 bar) @ 100° F (37.8° C)
    670 psi (46.1 bar) @ 140° F (60° C)
    225 psi (15.5 bar) @ 180° F (82° C)
    600 psi (41.3 bar) @ up to 140° F (60° C)
    225 psi (15.5 bar) @ 180° F (82° C)
    1000 psi (68.9 bar) @ 70° F (21° C)
    900 psi (62 bar) @ 100° F (37.8° C)
    670 psi (46.1 bar) @ 140° F (60° C)
    225 psi (15.5 bar) @ 180° F (82° C)
    600 psi (41.3 bar) @ up to 140° F (60° C)
    225 psi (15.5 bar) @ 180° F (82° C)
  • Optimum Design Flow Range
    1…20 ft/sec. (0.30…6 m/sec.)
    Extended flow range < 0.5…20 fps
    1…20 ft/sec. (0.30…6 m/sec.)
    Extended flow range < 0.5…20 fps
  • Pressure Drop
    0.5 psi or less at 10 ft/sec (3 m/sec.) for all pipe sizes 1.5 in. (38 mm) diameter and up
    0.5 psi or less at 10 ft/sec (3 m/sec.) for all pipe sizes 1.5 in. (38 mm) diameter and up
  • Accuracy
    Standard: to ±1% of rate over optimum flow range
    Standard: to ±1% of rate over optimum flow range
  • Straight Pipe Requirements
    Install sensor in straight pipe section with a minimum distance of 10 diameters upstream and 5 diameters downstream to any bend, transition, or obstruction.
    Install sensor in straight pipe section with a minimum distance of 10 diameters upstream and 5 diameters downstream to any bend, transition, or obstruction.
  • Repeatability
    ±0.5%
    ±0.5%
  • Enclosure
    • Sensor- battery: Polypropylene with Viton® sealed acrylic cover. Meets NEMA 6P specifications
    • Sensor: Polypropylene with Viton® sealed acrylic cover. Meets NEMA 4X specifications
    • Remote: Polycarbonate w/ Neoprene® sealed cover. Meets NEMA 4X specifications.
    • Sensor- battery: Polypropylene with Viton® sealed acrylic cover. Meets NEMA 6P specifications
    • Sensor: Polypropylene with Viton® sealed acrylic cover. Meets NEMA 4X specifications
    • Remote: Polycarbonate w/ Neoprene® sealed cover. Meets NEMA 4X specifications.
  • Programming
    • Battery powered version:  A-303 connector cable and SDI Series software
    • Bidirectional, pulse, and analog versions:  USB to DIC converter programming kit (840134-0002)
    • Battery powered version:  A-303 connector cable and SDI Series software
    • Bidirectional, pulse, and analog versions:  USB to DIC converter programming kit (840134-0002)
  • Display (Optional)
    • 8 character, 3/8 in. (10 mm) LCD
    • STN (Super Twisted Nematic) display
    • Annunciators for rate, total, totalizer multipliers, low battery, flow direction
    • 8 character, 3/8 in. (10 mm) LCD
    • STN (Super Twisted Nematic) display
    • Annunciators for rate, total, totalizer multipliers, low battery, flow direction
  • Accessories
    • USB to DIC converter programming kit (840134-0002)
    • ASDIB-20 programming kit- battery powered A-301 connector cable or USB
    • Battery powered version:
      • 07101 5 ft (1.5 m) extension cable
      • 07108 10 ft (3 m) extension cable
      • 07102 20 ft (6 m) extension cable
      • 07109 50 ft (15 m) extension cable
    • USB to DIC converter programming kit (840134-0002)
    • ASDIB-20 programming kit- battery powered A-301 connector cable or USB
    • Battery powered version:
      • 07101 5 ft (1.5 m) extension cable
      • 07108 10 ft (3 m) extension cable
      • 07102 20 ft (6 m) extension cable
      • 07109 50 ft (15 m) extension cable
View all Specifications
SDI Impeller Flow Meters: How They Work

Market Applications

  • Building Design, HVAC & Plumbing

    Flow instrumentation solutions are a crucial aspect of building design, construction and operation for apartments, hospitals, schools, factories and other facilities. From HVAC and grounds management to plumbing and water services, our meters are specifically designed to provide solutions that are accurate and reliable, even under the most challenging conditions.

    View Solutions
  • Utility Water Treatment & Distribution

    Water and wastewater treatment facilities have the critical job of producing a safe supply of high-quality drinking water. Their operational processes are complex and involve a wide range of flow measurement tasks. These applications demand the highest flow meter accuracy and reliability, as well as long-term stability and a low cost-of-ownership. Badger Meter water treatment solutions meet the challenge and are part of our end-to-end portfolio of products for the water utility industry.

    View Solutions
  • Process & General Industry

    To succeed in a competitive marketplace, manufacturers must deliver the right product on time, every time, as well as capitalize on opportunities for new products, while maximizing uptime and reducing production costs. These manufacturing and processing industries worldwide depend on precise measurement and control technology flow meters. Badger Meter flow meters produce consistently reliable performance to ensure proper blending, custody transfer and signal transmission as well as compliance with international industry standard requirements. Exceptionally durable flow meters and control products help keep production up and running.

    View Solutions

Product Documentation

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Contact a Customer Care Representative

We’ll get back to you within 24 hours or the following business day.

Prefer to call?
Customer Care representatives are available by phone Monday–Friday, from 9am–5pm CST.

For sales & general inquiries
Municipal water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010

For product support
Municipal water solutions: (800) 616–3837
Commercial & Industrial solutions: (877) 243–1010