Serving the Aviation Industry since 1973
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M850 Series Digital Chronometer
  • Two button control system is natural and error free. Setting operations are identical for both alarm and time setting.
  • Bright sunlight readable incandescent displays.
  • Illuminated buttons and annunciators for night viewing.
  • Flight Time recorded in hours and minutes or in hours, tenths, and hundreds.
  • Serial time data output for remote use.
  • Flight time alarm with external output.
  • Elapsed time count down timer with alarm.
  • A 4 MegaHertz crystal precision time reference.


Click on Part Number to see available options and pricing
P/N Description
M850-5V Digital Chronometer 5V Series
M850-14V Digital Chronometer 14V Series
M850-28V Digital Chronometer 28V Series
M850A-5V Digital Chronometer 5V Series Color Gray
M850A-14V Digital Chronometer 14V Series Color Gray
M850A-28V Digital Chronometer 28V Series Color Gray




M805B Series
  • M850B Features
  • FAA APPROVED
  • 2 1/4" INTERNAL MOUNT OR FRONT MOUNT
  • TWO BUTTON CONTROL SYSTEM
  • GREENWICH MEAN TIME
  • LOCAL TIME
  • FLIGHT TIME WITH ALARM
  • ELAPSED TIME WITH ALARM
  • COUNTDOWN TIMER WITH ALARM
  • OPTION AUDIO ALARM
  • BRIGHT SUNLIGHT READABLE DISPLAY
  • AUTOMATIC DIMMING
  • ILLUMINATED BUTTONS AND ANNUNCIATORS
  • KEEP ALIVE BATTERY OPTION
  • FAA APPROVED


P/N Description
M850B Black Front Mount
M850B-2 Internal Front Mount


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M850
M850B
GMT 24-hr. format
Local Time 12-hr. format, 24-hr. option offered
Flight Time Records in 99:59 standard, 99:99 hour option
Elapsed Time
Count Up
Starts in min., sec. then hrs.; min. up to 99:59 hrs.
Elapsed Time
Count Down
Settable from one second to 59 min., 59 secs.
Elapsed Time Alarm Activates @ 0 when counting down
Incandescent Displays readable in sunlight
Automatic Dimming Yes
Battery Type N size alkaline
Polarizing Filter Yes
Keep Alive Current .00004 Amps
Input Current .2 Amps
Input Voltage 28V (backlight available 5V, 14V, 28V (must specify)
Crystal Reference -40° C to +60° C. 001%
Weight 5 ounces
Warranty 1-year
  • Greenwich Mean Time: 24 hour format
  • Local Time: 12 hour or 24 hour option
  • Flight Time: Records in hours and minutes, up to 99:59, 99.99 hour option
  • Flight Time Alarm: Full set range flight time
  • Elapsed Time Count Up: Starts in minutes and seconds, then hours and minutes, up to 99:59 hours
  • Elapsed Time Countdown: Settable from one second to 59 minutes and 59 seconds
  • Elapsed Time Alarm: Activates at zero when counting down
  • Count Down Timer: Settable from one second to 59 minutes and 59 seconds.
  • LED Displays: Readable in sunlight
  • Automatic Dimming
  • Battery Type: CR2032
  • Keep Alive Current: .00004 amps
  • Input Current: 0.2 Amps
  • Input Voltage: 14 to 28 Volts (backlight available 5V, 14V, or 28V lighting)
  • Black Face Plate: Engraved Nomenclature
  • Grey Face Plate: Silkscreened Nomenclature
  • Weight: 5 ounces
  • Warranty: 1 year