The M811B Digital Clock is a multi-functional chronometer designed to operate under the most stringent operating conditions. It features three independent 6-digit solid state timing circuits: time, flight time, and elapsed time which can be controlled by the pilot. The incandescent display is readable in sunlight. Version 811B-1 has the ability to adjust local time to 12 hour or 24 hour setting.
NOTE: 28V install requires the 811-28 Dropping Resistor (sold separately).
- 2 ¼" internal mount
- Six-digit display on all 3 functions
- Local time 12 hour or 24 hour (user selectable)
- 24 hour flight time
- 24 hour elapsed time counter
- Sunlight readable display
- Memory battery included
Product Codes | |
|---|---|
| Mfr Part No: | 811B-1 |
| ECCN: | 7a994 |
| NSN: | 6645-01-074-2889 |
| PMA: | PQ1062NM |
| SCHEDULE B CODE: | 9104.00.0000 |
| SIN: | 334511 |
Weight: 7.5 ozInput current: 0.4 ampsInput voltage: 14 vNVIS option: NVIS green A lightingLocal time: 12-hour or 24-hour (user selectable)Flight time: 24 hourElapsed time count up: 24 hourBattery type: 6 volt battery with 2-year operating life
- Stock: Warehouse
- Manufacturer Part #: 811B-1
Aircraft Fitment Finder
Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
