# Keithley Instruments, Inc.

- Location (FDA's records): Cleveland, OH
- FDA decisions: 4 (1986–1994): 4 510(k) clearances
- Product codes: IYE (3), KPR (1)
- Predicates its devices cite: 0 (0 its own); citations of its devices by later devices: 3 (0 its own)
- Recalls linked to its devices: 0 (0 Class I)
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Firms that cite its devices most
- Aktina Medical Physics Corp.: 1 (https://510kreport.com/company/aktina-medical-physics)
- Sicel Technologies, Inc.: 1 (https://510kreport.com/company/sicel-technologies)
- Ptw-New York Corp.: 1 (https://510kreport.com/company/ptw-new-york)

## Its most-cited devices
- K874893: Model 35300 Tracker (TM) Therapy Beam Evaluator (1988), cited by 2
- K932598: TN-RD-50 (1994), cited by 1

## Recent decisions
- K942083: Advanced Therapy Dosimeter (Sep 2, 1994)
- K932598: TN-RD-50 (Jun 3, 1994)
- K874893: Model 35300 Tracker (TM) Therapy Beam Evaluator (Feb 17, 1988)
- K854110: Keithley Model 75100 & 75200 (Mar 6, 1986)

Source page: https://510kreport.com/company/keithley-instruments