Curtis Instruments

 Preco Safety

 Printed Motor Works

Curtis 803 - LED 10 segment display - LCD Hour Meter 24/36vDC 803RB2436BCJ

$ 220.00 each

21 items in stock

Curtis InstrumentsCurtis Model 803 combines in one instrument a completely solid state battery discharge indicator, an LCD hour meter and lift lockout, housed in a 52mm case.

Void of moving parts, this combination instrument is exceptionally reliable even in severe operating environments.

Model 803 is a combination gauge ideally suited for electrically powered vehicles.



'Fuel' Gauge Features

  • Multicolor 10-bar LED displays state of charge (5 green, 3 yellow, 2 red LEDs).
  • Flashing red LED signals "energy reserve" alarm at 70% discharged.
  • Double flashing red LEDs signal "empty" alarm at 80% discharged.
  • Normally closed relay opens at 80% discharge for lift lockout. This unique holding relay will only lock out at the end of a lift cycle.
  • Recognizes improperly charged battery.
  • Keyswitch activated LED display (Fuel gauge electronics are energized as long as they remain connected to the battery).
  • Wide range adjustable discharge profile.
  • Dual reset methods in each gauge: Open Circuit Reset for vehicles that exchange batteries and Charge Tracking Reset for vehicles whose batteries remain connected to the gauge during recharge.

Hour Meter Features

  • Monitors use-time throughout the equipment's lifespan.
  • Records and displays up to 99,999.9 hours on its LCD, rolls over and continues to count and display.
  • Hour meter LCD remains on as long as battery is connected.
  • Stores latest total in EEPROM nonvolatile memory, without need of power.
  • Operates and displays in temperatures from –40˚C to +65˚C under harsh conditions of vibration, shock, moisture and dust.

System Voltages

  • Available in single voltages from 12 VDC to 80 VDC, or in dual voltage of 24/36, 36/48, 24/48 or 72/80 VDC.
  • Operating range is ± 25% of nominal voltage.


  • Hour meter accuracy: +0.1%
  • Operating Temperature: –40°C to +65°C
  • Shock & Vibration: Meets SAE J 1378
  • Humidity: 95% RH (non-condensing) at +38°C
  • LCD Character Height: 5 mm
  • Mating Connector: Molex 8 pin, 39-01-2085
  • Discharge Range: Empty from 1.57 volts/cell to1.93 volts/cell.
  • Reset Levels: Open circuit reset (OCR)at 2.09 volts/cell.
  • Charge Tracking Reset (CTR) tracks battery recharge at 2.35 volts/cell full and 2.10 volts/cell empty.

Model Number Description: 

803 RB 2448 B C J
Case Style Voltage Reset Type/Level Discharge Profile Output
RB=Round (52mm)
w/black bezel
B=CTR/OCR (3zzO)
=HVR/OCR (1zzO/2zzO)
  • OCR=2.09vpc
  • HVR=2.35vpc
  • CTR=
    • 2.35 vpc full,
    • 2.10 vpc empty
1.57vpc to
1.93vpc at empty
J=N.C. holding relay
Contact rating=3 Amps
when continuously closed,
1 Amp when opening.
K=N.C. relay
Y=N.O. relay
contact rating=1 Amp


Curtis Instruments - Series 803