Rectangular LCD Hour Meter

DC9-60V, DC10-80V

R8866C Series

Panel cutout: 37x25mm

High Reliability & durability




Technical Specifications

  • Current consumption: < 10mA
  • Accuracy: ±0.1%


  • Display: 6-digit LCD5mm high
  • Range: 0- 99999.9
  • Resolution: 0.1 hour

Case Specifications:

  • Shape: Rectangular
  • Housing Material: ABS (Black)
  • Lens Material: Poly Glass
  • Panel Cutout (mm/in): 37x25mm
  • Mounting: Stainless steel U-bracket
  • Terminals: 3/16” Faston
  • Max Terminals: 4
  • Airproof: completely sealed


  • Operating temperature: -40 to +85
  • Storage temperature: -50 to +90
  • Humidity: 95% RH (Non Condensing) at 38
  • Shock & Vibration: Meets SAEJ 1378, work well under vibration of 18g’s,1075Hz


Terminal Mark Assignment
 Pin 1   + Power +
 Pin 2   - Power -
 Pin 3   C Counting enable / Input signal (Optional)
 Pin 4   R Reset (Optional)


Note: All digits display 8 for 1 second at power-up.

  • 2-Wire hour meter displays and accumulates hours only when powered.
    Typical application: Pin 1 to ignition in a vehicle or switch in equipment and Pin 2 to grounding.
  • 3-Wire hour meter with control pin displays recorded time, and begins to count hours when control pin is powered.
    Typical application: Apply DC+ or AC hot to pin + and DC- or AC neutral to pin –, the display is activated at this point but the elapsed time will not be accumulated until a signal is applied to pin 3.

          Note for proper operation: Power must be applied to pins + & – before or coincidently with pin 3.

  To operate: Apply DC+ or AC hot to pin 3 for 1/2 second minimum, the accumulation of elapsed time is indicated by the flashing hourglass icon. If power (pin+&-) has been applied for minimum 6 seconds, the accumulated time will be stored in non-volatile memory (EEPROM).

  • 4-Wire hour meter follows the same instructions as to 3-Wire hour meter, and has the reset pin available.
    Typical application: Pin 4 is connected to ground via a reset switch, by which the operator can clear old memory and get the hour meter return to Zero.


Features & Specifications of R8866C
Specifications, Dimensions, & Optional features.
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