Float Operated Level Transducer


RENAISSANCE of Float-Operated Level Transducers

Float Operated Level Transducer in the field




System Integration

Example V

Example VI



In reservoir

In tank

 Flash Flood




TW-260 series provides a cost-effective solution for precision liquid level measurement needs.
They are simple, inexpensive, yet practical means of continuously indicating levels in tanks, canals and reservoirs.

With constant torque spring instead of counterweight used in a conventional Float-Operated level transducer, TW-260 series level transducer can easily be installed, and requires only a small stilling well as necessary.

With built-in CMOS counter module triggered by the reed relays and magnetic disk instead of conventional shaft encoders, TW-260 offers an absolute readings with less component and cost to provide a precision level measurement.

TW-260S may be connected directly to data-logger, it also may be connected  to a transmitter  with RS232, RS485 or 4-20mA output thus linked to remote monitoring system or SCADA. Except for the data string echoed to request from transmitter, TW-260S outputs a pulse at every level change for event trigger so that the wireless transmitter would send the rising data at the first second for warning to accident.

  • Down size of Stilling Well in case of Shortcomings
  • Easy Installation
  • Free of Re-Calibration
  • Free of Fluctuation from Environment
  • Free of Drifts on Zero and Span
  • Low Power Requirements
  • Low Cost, Low Maintenance



  • Type: Constant Spring-Loaded Float-Operated
  • Sensibility: 0.5 cm, 2mm
  • Measuring Range: 5 m, 10 m, 15m
  • Accuracy: ± 0.5 cm ± 0.1 % F.S.
  • Output: 3-Wire Serial TWS Protocol
  • Power Consumption: 50 μA, Built-in Li-cell
  • Compatible Transmitter: SDI-12, RS-485, DC 4 to 20 mA

Data Sheet (PDF file)

TW-260S (for reservoir)

TW-260S (for tank)