​Signature®​​​​ Flowmeter

Flexible, configurable flowmeter for perma​nent discharge compliance monitoring

Signature FlowmeterThe 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​.


When you purchase instruments from Teledyne ISCO, you not only receive innovative, high quality products, you also receive excellent customer service and product support. Your initial purchase is only the beginning of Teledyne ISCO's ongoing commitment to their customers.


Optimizing Signature Flowmeter PerformanceApplication Note
Flow Measuring Product GuideBrochure
Signature Flowmeter BrochureBrochure
Water and Wastewater Product GuideBrochure
Influent Flow Monitoring at Wastewater Treatment Plant, Milan, ItalyCase Study
Influent Flow Monitoring at Water Treatment Plant, Venice, ItalyCase Study
Non contact Laser System Solves Flow Measurement Challenges at Rzeszow, Poland, Wastewater Treatment PlantCase Study
Stormwater Monitoring at a Wastewater Treatment Plant (WWTP) in Biberach, GermanyCase Study
Wastewater Treatment Plant Influent Flow Monitoring, Muscat, OmanCase Study
Signature Data SheetDatasheet
Cell Antenna PlacementInstruction Sheet
Instructions for Installing Ferrite BeadsInstruction Sheet
Instructions for Installing Resistor AssemblyInstruction Sheet
Signature Flow Meter Pocket Guide (German)Pocket Guide
Signature Flow Meter Pocket GuidePocket Guide
Signature Quick Start GuideQuick Start Guide
350 Ex Certification and Safety SheetSafety and Certification Sheet
Signature Flow Meter Safety and Certification SheetSafety and Certification Sheet
TIENet 310 Ex Ultrasonic level Sensor Safety and Certification SheetSafety and Certification Sheet
301 pH-Temperature_Device_ManualUser Manual
306 Sampler Interface ManualUser Manual
310 Ex Ultrasonic Level Sensor ManualUser Manual
350 EX Area Velocity Sensor ManualUser Manual
LTE Cell Service Activation for SignatureUser Manual
Signature BUBBLER Flowmeter User ManualUser Manual
Signature NON-BUBBLER Flowmeter User ManualUser Manual
TIENet Barrier Installation GuideUser Manual


​Signature Flowmeter

​Dimensions (HxWxD)
​8.88 x 12.22 x 8.22 in (22.555 x 31.039 x 20.879 cm)
​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

For a full list of product specifications, see the datasheet.




Standard Features

  • Multiple simul​​taneous 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
  • Hazardous Locations

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
  • TIENet 330 Bubbler module
  • TIENet 350 Ex Area Velocity Sensor
  • TIENet 360 LaserFlow and LaserFlow Ex Non-contacting Area Velocity Sensor
  • TIENet Barrier
  • Battery back-up power
  • Mechanical totalizer
  • Advanced cellular and Ethernet communication options
  • Mounting hardware