Stork Solutions

STI-638 Pulse Rate/ Period Meter in Wall Mounted IP 67 Housing

Introducing the STI-638 Tachometers: Precision Speed Control and Measurement

Experience precise speed control with our STI-638 Tachometers. Encased in a sturdy wall-mounted housing (IP 67), these tachometers boast a large 6-digit LED display for easy reading. Monitor rotational or linear speed effortlessly and measure frequency with accuracy. Convert speed values into their inverses to track revolution periods or process durations. With a 24V DC / 100 mA output, they power measuring transducers, while the RS-485 port enables seamless data transmission in production process monitoring systems. Enjoy programmable REL / OC control outputs that respond to real-time speed values. Customise with analogue outputs of your choice. Configuration is a breeze using the remote controller, local keyboard, or S-Config software via RS-485 communication port. Achieve precise speed control and measurement with the STI-638 Tachometers.

Product Highlights

The STI638 tachometers are housed in a tight, wall-mounted casing (IP 67) with a 6-digit LED display. They are designed to control rotational or linear speed and can also measure frequency. An additional advantage is the ability to convert speed values into inverse values and display the single revolution period or process duration. The device features a 24V DC / 100 mA output for supplying measuring transducers and an RS-485 port for data transmission in production process monitoring systems. The REL/OC control outputs can be programmed based on the instantaneous rotational speed. The counter can be equipped with analogue outputs, including active current output, passive isolated current output, or active voltage output. Configuration can be done without opening the case using the remote controller, local keyboard, or free S-Config software via the RS-485 communication port.


  • Pulse rate / period meter in wall mounted IP 67 housing
  • Rotational / linear speed control
  • Revolution / movement period control
  • Binary outputs REL / OC
  • Analogue output: active or passive, power supply output: 24V DC
  • RS-485 / Modbus RTU
  • “over” signalling when the measuring range is exceeded
  • Ultra bright red, green and blue display
  • Free configuration software S-Config

To download the latest datasheet click here: STI 638

Additional information


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