# K173848: Model WP-3840 and WP-3040

- Pathway: 510(k) (Traditional)
- Applicant: Cnmc Co., Inc.
- Decided: Aug 7, 2018 after 231 days
- Product code: IYE (Accelerator, Linear, Medical)
- Device class: 2
- Regulation: 21 CFR 892.5050
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 1 generation back to K943199 (1994). 1 ancestor in all.
No later device cites it as a predicate yet.
0 of 2 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K943199: Motorized Depth Dose Apparatus, Medtec, Inc. (1994) Summary page 4.

## Indications for use
The Water Phantom WP-3840 and WP-3040 comprises of a one-dimensional precision mechanism attached to an Acrylic water tank. Various radiation detectors can be positioned along a vertical guide rail in different depths according to the application needs. The WP-3840 and WP-3040 consist of the basic acrylic water tank phantom, equipped with a hand crank to move the detector. That hand crank is coupled to a mechanical counter, reset-able position indicator that displays the depth.

Source page: https://510kreport.com/device/K173848
Methodology: https://510kreport.com/methodology