# K940651: Sarns Ultrasonic Air Sensor

- Pathway: 510(k) (Traditional)
- Applicant: 3M Health Care, Sarns
- Decided: May 24, 1994 after 98 days
- Product code: KRL (Detector, Bubble, Cardiopulmonary Bypass)
- Device class: 2
- Regulation: 21 CFR 870.4205
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
7 later devices descend from it; 2 cite it directly.
0 of 8 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K091908: M3 Monitor (2009), 5 descendants of its own
- K110957: M4 Monitor (2011), 4 descendants of its own
- K173591: Quantum Diagnostic Module, Quantum Diagnostic Module - No Gas (2018), 3 descendants of its own
- K181942: Quantum Ventilation Module (2018), 2 descendants of its own
- K202733: Quantum Ventilation Module (2020), 1 descendant of its own

Source page: https://510kreport.com/device/K940651
Methodology: https://510kreport.com/methodology