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STI-73 Pulse Rate/ Period Meter

Discover the STI-73 Tachometers: Your solution for precise speed and frequency measurement. This advanced device offers accurate frequency measurement and the unique ability to convert speeds into inverse values, providing deep insights into your operations. It features customisable control outputs for real-time speed adjustments and easy programming via a local keyboard or S-Config software through RS-485. Elevate your speed control capabilities with the STI-73 Tachometers.

STI 73 Pulse Rate Meter Product Parameters

  • Output Signal: Max input frequency 50.0 kHz, adjustable brightness LED display
  • Accuracy: ± 0.02% ± one digit, full temperature range
  • Electrical Connections: Max 4.5 VA, 19V ÷ 50V DC, 16V ÷ 35V AC
  • Media Compatibility: IP 65 front protection, IP 20 for case/connection clips
  • Special Features: RS-485 Modbus RTU, non-volatile memory, customisable pulse waiting time

Product Highlights

The STI73 tachometers are versatile devices specifically engineered to regulate the speed of rotating or linearly moving objects. These tachometers offer an additional advantage by being able to accurately measure frequency as well. A notable feature of the STI73 tachometers is their capability to convert rotational or linear speed into inverse values, providing users with valuable insights. Furthermore, these devices are equipped to display the duration of a single revolution or process period, enhancing their functionality. The REL/OC control output of the STI73 tachometers can be conveniently programmed to respond according to the instantaneous value of rotational speed, adding flexibility to their application. Configuration of the counter is made easy through the use of either the local keyboard or the S-Config software, which is accessible through the RS-485 communication port. With its comprehensive features and user-friendly interface, the STI-73 tachometers offer a reliable solution for controlling and monitoring speed and frequency in various industrial applications.


  • Pulse rate / period meter
  • Rotational / linear speed control
  • Revolution / movement period control
  • 1 REL / OC outputs
  • Power supply output: 24V DC
  • RS-485 / Modbus RTU
  • “over” signalling when the measuring range is exceeded
  • Free configuration software S-Config

To download the latest datasheet click here: STI 73

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