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SenDEC 812 Dual Gauge with Molex Connector


Two gauges in one plus Lockout contact switch!
Top gauge is a Battery Fuel gauge, Bottom gauge is an Hour Meter with Flash Alert options

Dual Gauge with Lockout

Fuel gauge & Hour Meter with easy connect
SenDEC’s Dual Gauge is the solution to maintenance challenges when room and
cost are a concern. The top meter is a Battery Fuel gauge that indicates the
battery charge level. The bottom meter is an Hour Meter with Flash Alert options.
An industry standard 8 pin connector is provided for easy connection. All gauges
are 100% epoxy encapsulated for superb environmental durability.


Operation of the Battery Fuel Gauge:
Charge capacity is indicated using a 10 segment LED bar graph display from full (right LED segment lit) to empty (Left LED
segment lit). LED Flash Alert™ flashes the 2nd LED from the left as a warning that the battery has discharged 70%. At 80%
discharge, LED Flash Alert™ flashes the left 2 LEDs to indicate very low capacity is remaining. The charge levels and LED
Flash Alert™ can be OEM customized.


Operation of the Hour Meter:
The hour meter is OEM specified and can count to 9,999.9 hours with 1/10 hour resolution, or 99,999 hours with 1 hour resolution.
SenDEC Flash Alert service alarms are available based on OEM requirements. The LCD is always lit, so users can examine the
total hours, or if service is due at any time. Various DC or AC/DC inputs and voltage ranges are available.


Dual Gauge with Lockout - Wiring




Terminal assignments:
Pin 1: Hour Meter – input
Input (-). Connect to battery ground.

Pin 6: Hour Meter + input
Input (+). When positive voltage is applied with relation to Pin 1, time recording is initiated

Pin 2: Keyswitch input + when positive voltage is applied, the LED display is lit. This may also be wired to the Pin 6 Hour Meter + input, so when the Keyswitch is closed the Hour Meter records running time.

Pin 3, 4: Lockout contact switch when the battery reaches a specified low charge level, the contact is opened. Under normal operating conditions the contact is closed allowing normal equipment operation.

Pin 5: Battery – input (For Battery fuel gauge reading)
Connect as close to the battery negative terminal as possible.

Pin 7 or 8: Battery + input (For Battery fuel gauge reading)
Connect as close to the battery positive terminal as possible.

Battery Fuel Gauge
• Available in 12, 24, 36, and 48 volt DC ranges
• 10 segment LED Bar Graph display
• Resolution: 10% per LED segment (or OEM specified)
• Current Draw: 5mA LED Display off,
• 20mA with LED Display ON
• Reverse Polarity Protected
• LED enable input to save battery current
• 70% discharge indicated by the 2nd LED segment flashing
• 80% discharge indicated by the 2 left LED segments flashing
• 3 Discharge profiles available
• Overcharge protected (50% over nominal voltage)
• Full charge indicated when the Top LED bar is lit
(specified full charge voltage per cell is reached for a
minimum of 6 minutes continuously).


Environmental Specifications
• Fits in a standard 2” hole
• Operating temperature: -40F to 160F (-40C to 71C)
• Shock: SAE J1378 55g’s
• Vibration: SAE J1378 20g’s
• Humidity: SAE J1378 95% RH
• 100% Epoxy encapsulated and sealed
• Case Material: ABS, black or white
• Weight 1 oz.
• Warranty: Two years for OEMs


OEM Options
• Liquid & liquid fuel, Volt meter, and other applications
• Custom charge and discharge profiles
• Custom Logos and color printing
• Lockout function to disable vehicle operation when the battery is
dangerously low.


Hour Meter
• LCD display always lit
• Counts to 9999.9 or 99,999 hours
• Various inputs and voltage ranges available
• Available with Flash Alert service reminders



812 Coding




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Specifications are preliminary and are subject to change without prior notification.
All rights reserved by SenDEC Corporation. 5-08 Rev A