Starting at $552.00

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  • For flow rates from under 0.3 ft/sec to over 20 ft/sec
  • Accurate up to ±1 %
  • For 1-1/2 to 36+ inch pipes
  • Insertion and hot tap versions
  • Numerous output and materials options
  • Rugged brass or stainless steel construction
  • Bi-directional flow metering available
  • Battery powered electronics available

Badger Meter SDI series impeller flow sensors offer unparalleled performance for liquid flow measurement in closed pipe systems in an economical, easy to install package. Designed for insertion or hot tap installations, SDI series flow 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 Badger Meter SDI series measures flow rates from under 0.3 ft/sec to over 20 ft/sec. A proprietary digital detection circuit allows the meter to achieve accuracies of up to ±1 % regardless of the conductivity or turbidity of the liquid. The SDI series insertion style sensor is intended for general flow measurement applications on pipes ranging from 1-1/2 to 36 or more inches. They are available in either brass or stainless steel construction and install directly into pipes via a 1" tap. Hot tap sensors feature an isolation valve and mounting hardware to install or remove the sensor from a pipeline that is in service at the time of installation or cannot be de-pressurized and drained for service. The hot tap sensors are constructed of 316 stainless steel and are rated for service to 1000 psi and 180° F.

The Badger Meter SDI series includes a rugged, four-bladed, non-fouling impeller which does not require custom calibration. The sensors can be configured for bi-directional flow as well as battery powered electronics. Additionally, there are a number of options for output, display and materials allows users to customize the sensor to nearly any application.

Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.

Badger Meter ASDIB-20 Programming Kit
Programming kit for battery powered Badger Meter SDI series flow sensors
In Stock
Badger Meter 840134-0002 Programming Kit
USB to DIC converter programming kit facilitates the connection of legacy devices to USB computer ports
In Stock


Badger Meter Extension Cable
Extension cables for SDI series flow sensors with remote display


Please consider these optional accessories.

Badger Meter A1027 Hot Tap Adapter
Brass tapping adaptor for Badger Meters SDI flow sensors
Badger Meter Model 310 Analog Transmitter
Programmable transmitter for converting flow signals to a linear 4-20mA analog signal
Badger Meter Model 320 Pulse Transmitter
Programmable transmitter for converting flow signals to a scaled units/pulse signal

Application Notes

Here's how some of our customers used this product.

4-inch Chilled Water Line

The Background: Our customer is an utility company currently doing retrofit work on a 4-inch water line that feeds a chiller. They seek a simple, easy-to-install flow meter to measure the amount of water travelling the pipe.

The Problem: The pipe has an existing 1” fitting and the customer does not want to install a 1-1/2” fitting which most other flow meters would require.

The Solution: The Badger Meter SDI Series are paddle wheel flow meters designed for insertion or hot-tap installations. They are an excellent value, accurate, and simple to install as a battery operated totalizator is available meaning there are no wires to run. Per the customer’s needs, the SDI Series is intended for direct installations into pipes via a 1” tap.