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Timer PET2+

Dual programmable timers to control events on board complex rocket models. Up to 4 fully programmable events and many other advanced functions.

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The PET2+ timer sets a new performance standard with the most advanced and versatile dual event timer functions available in High Power Rocketry today. It's the perfect choice for staging, airstarts, or other specialized timing applications from the simplest to the most complex projects.

The PET2+ timer goes beyond "dumb timer" capabilities, by providing programmable G-ranges and integration timing so you can discriminate chuff's or cato's from actual "motor ignition" events. Couple these capabilites with its 3-axis orientation and you get the most "mission adaptable" timer for any HPR flight timing tasks.


Functional Features

  • 2 completely independent programmable on-board timers
  • 3-axis orientation provides the most flexible mounting options for your project
  • 3 programmable time bases
  • 4 programmable trigger events
  • Break-wire input circuit interlocks with any trigger event for fail-safe permissive
  • Independently programmable G-range triggering
  • Programmable event output pulse duration
  • One-shot or Repeat Interval timer operations
  • Off-axis and Auto Orientation detection operation
  • Interactive menu programming and operation via pushbuttons and LED's
  • All User setpoints are stored in non-volatile EEPROM
  • Complete on-board diagnostic capability with POST

Physical and Operational Features

  • Small "Mini" footprint (just 25 mm wide x 80 mm long)
  • 29mm capable
  • Virtually all SMD construction with silicon resin conformal coating
  • Full ETE (End-to-End) calibration to null out operational tolerances
  • Dedicated "large screw" compression terminals
  • Easy "2 hole" mounting with M3 screws

Timer1 and Timer 2 Setpoints

  • MEIG trigger level - adjustable from 2 to 5 G's in 1 G increments
  • SEIG trigger level - adjustable from 2 to 5 G's in 1 G increments
  • Inertial Trigger Event - MEIG / MECO / SEIG / SECO
  • Trigger Integration Time - adjustable from 0.1 to 3 seconds in 0.1 sec increments
  • Break-wire Function - N/A, Exclusive Trigger, Interlock Trigger
  • Timer Interval - adjustable from 1 to 100 (Time Base Dependent)
  • Time Base - Fast (0.1 sec) / Slow (1 sec) / Extra Slow (2 sec)
  • Timer Operation - One-shot / Repeat


MEIG = Main Engine IGnition
SEIG = Second Engine IGnition – Second stage or secondary engine ignition
MECO = Main Engine Cut-Off
SECO = Second Engine Cut-Off – Shutdown of second stage or secondary engine

Global Setpoints

  • Intertial Trigger Axis - X-axis / Y-axis / Z-axis / Auto Detect
  • Off-Axis / Off Calibration - adjustable to well over +/- 20 degrees
  • Piezo Tone - High Tone / Low Tone

Diagnostic Features

  • Continuity Input Test mode
  • MosFET Output Test mode

Data sheet

Device type