SOLID STATE BATTERY

‘FUEL’ GAUGE & HOUR METER

DESCRIPTION

Model 802 is a combination battery ‘fuel’ gauge and solid 

state hour meter housed in a single 52mm diameter case. 

Void of moving parts, this two-in-one unit provides exceptional 

reliability even in severe operating conditions.

MODEL 802

APPLICATION

Model 802’s dual voltage feature makes it ideal for material 

handling applications, including forklift truck manufacturers 

and parts dealers trying to ease their stocking requirements. 

These high quality gauges are also advantageous on sweeper/scrubbers, aerial lift platforms and personnel carriers.

FEATURES

‘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.

• Recognizes improperly charged battery.

• Keyswitch activated LED display (Fuel gauge electronics 

are energized as long as they remain connected to the 

battery).

• 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.

Hour Meter Features

• Monitors use-time throughout equipment’s lifespan.

• Records and displays up to 99999.9 hours on LCD,

rolls over and continues to count and display.

• Stores latest total in EEPROM nonvolatile memory, without 

need of external power or internal battery.

• Operates and displays in temperatures from -40 ̊C 

to +65 ̊C under harsh conditions of vibration, shock, 

moisture and dust.

• Accuracy of +0.1% throughout its operating 

temperature range.

• Flashing hour-glass icon signals hour-meter 

accumulation of time.

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.

CURTIS INSTRUMENTS, (UK) LTD.

5 UPPER PRIORY STREET

NORTHAMPTON NN1 2PT, ENGLAND

TEL 44 (0) 1604-629755

FAX 44 (0) 1604-629876

CURTIS INSTRUMENTS, INC.

200 KISCO AVENUE

MT. KISCO, NY 10549 USA

TEL (914) 666-2971

FAX (914) 666-2188

www.curtisinstruments.com

CURTIS INSTRUMENTS INDIA 

PRIVATE LTD.

 1199, GHOLE ROAD

 PUNE 411004, INDIA

TEL 91 (0) 20-5531288

 FAX 91 (0) 20-5539192
MODEL 802

50025 REV C 6/07

DIMENSIONS MM

WARRANTY Two year limited warranty from time of delivery.

MODEL NUMBER DESCRIPTION

TECHNICAL SPECIFICATIONS

 Specifications subject to change without notice. ©Curtis Instruments, Inc. 2007

 is a trademark of Curtis Instruments, Inc. 

Current consumption: 65mA maximum @ 48 V nom.

Weight: Less than 3.5 oz

Operating temperature: -40°C to +65°C

Storage temperature: -50°C to +90°C

Shock: SAE J1378 55g

Vibration: SAE J1378 20g 

Humidity: 95% RH (non-condensing) at 38°C

Note: The following data covers both ‘fuel’ gauge and hour meter.

802RBwwxxBG or 802RBwwxxBN

 ww = lower of the two voltages for dual voltage units, or none for single voltage units.

 xx = voltage of single voltage unit or higher of the two voltages for dual voltage units.

Discharge profile:

 BG = for electric vehicles that have a discharge profile ranging from 1.97 to 1.75 volts per cell.

 BN = for electric vehicles that have a discharge profile ranging from 2.04 to 1.73 volts per cell.

Reset voltage:

 If power is broken to the battery ‘fuel’ gauge during charging, the unit will reset at 2.09 volts per 

 cell. If the battery ‘fuel’ gauge remains connected during charging, the gauge will track the battery

 from 2.10 volts per cell to 2.35 volts per cell.

B + HI

5 6

1 2

3 4

B + LOW

ETI (+)

ENABLE

COMMON

(B-)

KEYSWITCH

ETI (-)

ENABLE

BLACK BEZEL

THUMBNUT 4MM

WASHER 4MM

SEE NOTE 2.0

"U" CLAMP FOR .76 TO 6.35

PANEL THICKNESS

LABEL

52.07 MAX

55.37 MAX

9.02 MAX

58.42 MAX

- +

FUEL GAGE "LED" 2 RED.

3 YELLOW. 5 GREEN.

BAR HEIGHT 5mm

HOUR METER "LCD"

CHARACTER HEIGHT 5mm

1

88888.8 10

0 1 1 2