TTFM 1.0

  • Easy Mounting, Single Head Sensor
    12mm  to 1200mm 
  • Wide Flow Rate
    Velocity: +/-0.02 - 12 m/s
  • PC Software
    Built-in datalogger and retrieval software
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Accurately measure the flow rate of clean, non-aerated liquids like water, chemicals, and oils in full pipes. Ultrasonic transducers mount on the outside of a pipe without shutting down flow. Flow rate is displayed on the large, backlit display along with totalizer and signal strength. Use the built-in control relays for flow alarms or flow proportionate pulse. Connect the isolated 4-20mA output to PLC's or controllers.

The TTFM 1.0 works on a wide range of pipe sizes and materials including carbon steel, stainless steel, ductile iron, cast iron, PVC, PVDF, fiberglass, copper, brass, aluminum and pipes with bonded liners including epoxy, rubber and Teflon.

The TTFM 1.0 Transit Time Flowmeter operates by measuring the “transit time” or “time of flight” for ultrasonic sound pulses transmitted from one transducer to another. Depending on the mounting configuration, the signal may cross the pipe once, twice or four times. To measure flow the transit time is compared between ultrasonic signals travelling upstream and downstream.

General Specification
Operating Parameters 

For clean liquids in full pipes with less than 2% solids or gas bubbles 

Calibration B and menu uilt-in 5-key calibrator with English, French Spanish language selection 
Electronics Enclosure 

Watertight and dust tight NEMA4X (IP 66) polycarbonate with clear, shatterproof cover 


± of reading or 0.1 ft/sec (0.03 m/sec), whichever is greater 1%

Repeatability & Linearity: ±0.25%

Display White, backlit matrix - displays ,14-digit totalizer, relay 5-digit flow rate with floating decimal status, operating mode and calibration menu 
Power Input 100-240VAC 50-60Hz (see Options), Watts maximum (with standard features)
Output Isolated 4-20mA/0-5V, 1000 ohm load maximum, programmable offset 
Control Relays 2 programmable flow alarm and/or flow Relays, form 'C' dry contacts rated 5 amp SPDT; proportional pulse
Operating Temp. (electronics) -5° to 140°F (-20° to 60°C)
Transducer Specification
Pipe Diameter

½ to 48” (12 mm to 1200 )

Pipe Materials Any metal or plastic sonic conducting material including carbon steel, stainless steel, ductile iron, cast iron, , aluminum PVC, PVDF, fiberglass, copper, brass and pipes with bonded liners including epoxy, rubber and Teflon
Flow Velocity

± 0.07 to 39 ft/sec ( 0.02 to 12 m/sec) typical 

Operating Frequency

1.28 MHz

Operating Temperature 40° to 300°F (-40° to 150°C)
Transducer Mounting Kit Includes set of stainless steel pipe clamps, and coupling compound
Transducer Cables RG-58 coaxial, 25 ft (7.6 m) with BNC connectors and seal jackets
Certification Non-incendive for Class I Division 2, Groups A,B,C,D hazardous locations

Water networks

Ultra clean water

Chemicals & Acids

Hydraulic oils