Flexible, configurable flowmeter for permanent discharge compliance monitoring

The Signature® flowmeter is designed for open channel flow monitoring applications. It supports flow measurement technologies including bubbler, non-contact laser area velocity, submerged Doppler ultrasonic area velocity, and ultrasonic. The meter can calculate flow using standard open channel level-to-flow and area velocity conversions, as well as user-defined equations, level to area data points, or level to flow data points, depending on the application need.

The Signature flowmeter has unique features to verify data integrity. It logs key events such as changes in calibration and power outages to validate data accuracy. Data can be easily reviewed to detect any type of data alteration. With multiple smart interface options and multi-parameter logging (such as pH), the Signature flowmeter provides a common platform for control action, reporting, and communication.

Multiple flow technologies are available so you can select the best flow technology for the measurement site and channel conditions. Available technologies are: bubbler, ultrasonic, continuous wave area velocity, and non-contacting LaserFlow® velocity​.


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Isco Flowmeters


Standard Features

  • Multiple simultaneous flow technologies
  • SDI-12 input
  • RS-485 Modbus input
  • RS-485 Modbus output
  • Rain gauge input
  • Multiple parameter data logging
  • Program and Summary Reports
  • Data integrity verification
  • Triggering, sampler enabling
  • Compatibility with Flowlink® software


  • Industrial Pretreatment Compliance

  • Shallow Flow Measurement in Large and Small Pipes

  • Permit Enforcement

  • Wastewater Treatment Plants

  • Outfall

Options and Accessories

  • TIENet 301 pH/Temperature Device

  • TIENet 304 Contact Output Card (two user-assignable outputs per card)

  • TIENet 306 Sampler interface (triggering and pacing)

  • TIENet 307 Analog Input Card (two user-assignable inputs per card)

  • TIENet 308 Analog Output Card (two user-assignable outputs per card)

  • TIENet 310 Ex Ultrasonic Level Sensor (Mcerts certified with Signature)

  • TIENet 330 Bubbler module (Mcerts certified with Signature)

  • TIENet 350 Ex Area Velocity Sensor (Mcerts certified with Signature)

  • TIENet 360 LaserFlow Non-contacting Area Velocity Sensor (Mcerts certified with Signature)

  • Battery back-up power

  • Mechanical totalizer

  • Advanced cellular and Ethernet communication options

  • Mounting hardware


Signature Flowmeter

​Dimensions (HxWxD) ​8.88 x 12.22 x 8.22 in (22.555 x 31.039 x 20.879 cm)
​Inputs ​SDI-12 (2)
pH Measurement (TIENet 301)
Analog In (TIENet 307)
Rain In
Analog (TIENet 308)
Contact Output (TIENet 304)
SMS Alarm
​Cable Entry ​Standard: 3/4″ NPT Conduit
Optional: 3/4″ NPT Cord Grips
​Power Requirements ​100 to 240 VAC, 50/60 Hz
10-28.5 VDC Nominal
36VDC Max​
*current consumption varies upon configuration


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