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OLD100-1 Display

OLD100-1 Display


Our OLD100-1 digital tachometer is perfect for applications where displaying a numeric value related to an operation is required. Compatible with various types of feedback devices such as Hall Effect sensors, NPN encoders, or electromagnetic pick-ups, incorporating the OLD100-1 into existing systems is easily accomplished. Users can choose from four modes of operation that include tachometer, time in process, time in process monitor, and totalizer. With the ability to accept 115 or 230 VAC power and able to source 5V or 12V, up to 10mA, for feedback devices, the OLD100-1 is ideal for your display needs.

Potentiometer Kit 202-0014 is included with a purchase of the OLD100-1


Contact the factory for volume pricing

AC Line Power Acceptable Feedback Devices Power Supply Voltage For Feedback Devices Feedback Frequency Range
OLD100-1 115 / 230 5.5 watts nominally Hall Effect Sensor*
Electromagnetic Pickup
5 or 12 VDC NPN-type encoder or proximity switch*
5 or 12 VDC
10 mA
0 - 20,000 Hz

* NPN-type feedback devices should have a built-in pull-up resistor or have a pull-up resistor added externally.


  • Four Operating Modes:
    • 1) Speed
    • 2) Time In Process
    • 3) Inverse Speed (i.e.,minutes per revolution)
    • 4) Number of Counts
  • Selectable Feedback Devices: Accepts magnetic pickup, hall effect, inductive proximity sensor or encoder input.
  • +5 VDC (50mA) or +12 VDC (25mA) power supply: Provided to power feedback device.
  • Wide Frequency Range: Accepts 0-20,000 Hz from feedback device.
  • Easy to Read Display: 4-digit LED display is 0.7" (17.5 mm).