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STI-94 Pulse Rate/ Period Meter

Meet the STI-94 Tachometers: Your solution for precise speed and frequency measurement. These advanced tachometers not only measure frequency accurately but also convert speeds into inverse values for detailed insights. Featuring programmable control outputs and a variety of analogue outputs, they cater to diverse needs. Easily configure your device with a local keyboard or S-Config software through RS-485. Elevate your speed measurement with the STI-94 Tachometers.

STI 94 Pulse Rate Meter Product Parameters

  • Output Signal: Max input frequency 50.0 kHz, adjustable LED brightness
  • Accuracy: ± 0.02% ± one digit, full temperature range
  • Electrical Connections: Max 4.5 VA for various power supply options
  • Media Compatibility: IP 65 front protection, optional IP 20 case/connection clips
  • Special Features: RS-485 Modbus RTU, customisable pulse waiting time, multiple binary outputs


Product Highlights

The STI94 tachometers are highly versatile devices designed to effectively control and monitor the rotational or linear speed of moving objects. With its ability to accurately measure frequency, this tachometer offers precise data on the speed of various processes. A notable feature of the STI94 is its capability to convert rotational or linear speed into inverse values, providing valuable insights into single revolution periods or process durations. Moreover, the device offers flexible control outputs such as REL/OC, which can be programmed based on the instantaneous value of rotational speed. For enhanced customisation, the counter can be equipped with analogue outputs tailored to the customer’s needs, including active current output, passive isolated current output, or active voltage output. Configuration options are made convenient with either the local keyboard or the user-friendly S-Config software, accessible via the RS-485 communication port. The STI94 tachometer stands as a reliable and adaptable tool for precise speed control and measurement in a wide range of applications.


  • Pulse rate / period meter
  • Rotational / linear speed control
  • Revolution / movement period control
  • 0, 2 or 4 REL / OC outputs
  • Analogue output: active or passive, 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 94

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