Ultrasonic Transit Time Flow Meter TTFM100 NG series: Din bar mounting stationary type with display and keypad
The Transit Time Flow Meter of TTFM100 NEW GENERATION (NG) series measures flow rate by calculating the spreading time of an ultrasonic wave in a liquid, going upstream and downstream into a pipe.

  • High accuracy
  • Wide measuring range from DN15 to DN6000
  • With 3 different types of clamp-on sensors
  • Clamp-on sensors for high temperature applications and insertion sensors for pipes up to DN2000
  • PT100 input for calory/BTU, GJ, KW, KCal measurement
  • Menu in English and Italian for an easy set-up
  • Power supply: 8O0…264 VAC and 24 VDC
  • Outputs: Analog 4…20 mA, digital and serial RS485 Modbus RTU.

Ultrasonic transit time Flow meter and calorimeter 


Alphanumeric LCD display backlight, double lines up to 20 characters.
Visualization of instantaneous flow, totalized flow and fluid speed.
Positive, negative and net totalization.
Internal data logger Storage of daily, weekly, monthly and yearly total flow.
Storage of on/off times.
Storage of total working hours.
Storage of up to 18 different applications.

Automatic record of:

  • flow data of the last 512 days/128 Months/10 years;
  • on/off times and corresponding flow rate of the last 32 times;
  • working status of last 512 days SET-UP By Push Button keypad or By external keypad or by software via RS485

Menu in Italian and English.


Flow: Imperial and metric Calories, BTU; GJ; KW;

KCal DIAGNOSTICS Evolved diagnostics to control application with reliable tests:

  • power-sensory signals;
  • quality sensory signals;
  • measuring the transit time and delta Time. ;
  • display-Reynolds number;
  • proper positioning-control sensors;
  • ultrasonic signal wave-form display;
  • sound;
  • velocity fluid WIDE MEASURING RANGE: Several types of transducers to be selected, measuring pipe size from DN15mm to DN6000mm with four different types of sensors. 

15 Liquid listed as preset in the selection menu.
Pipe materials n ° 10 pipe material listed into the selection menu: Carbon Steel, Stainless Steel, Cast Iron, Copper, Alluminim, Absestos, PVC, PP, PEHD, Fiber Glass, Cement etc.
Liner is allowed n° 11 internal liners listed as preset in the selection menu.
Liquids Water, Sewage Water, River Water, Sea Water, Acid and Alkali liquid, Alcohol, Oil, Fuel, Beer, all the uniform liquid that can transmit ultrasonic.
Suspended Solid: up to 20.000 ppm.
-30…+ 90° C Standard;
-30…+ 160° C High Temperature.
Working range + / – 16 meters / second.
Housing din rail Mounting for mounting in electrical panels Housing dimensions 90×90×36mm IP20.
Output signal Analog output 4…20 mA galvanically isolated RS 485 MODBUS output.
Output pulse totalization 3 to 100 Vdc max. or alarm.
Programmable frequency:

  • output 12 … 9999 Hz INPUT SIGNAL Clamp-on sensor;
  • inputs and sensor wetted. 

PT100 ohm when it works like heat meter HIGH ACCURACY MEASURING.
Linearity: better than 0.5%,
Repeatability: better than 0.2%, Accuracy: better than ±0.5% (for speed > 0.5 mt/sec).
For pipe diameters from DN20 to DN6000. It is possible to use all the Clamp-On sensors and all the wetted sensors.
SENSOR UPSTREAM, the straight pipe section should be 10 D.
SENSOR DOWNSTREAM it should be 5 D.
Power supply 12…24 VDC.
Power Consumption max. 2W.

To download the datasheet click on the link below:

pdf TTFM100-F18-NG (Size 922.28 kB)