The list below presents test reports on several instruments produced by Ludlum.
- Model 3 ANSI Combined
- Model 4 ANSI Combined
- Model 12 Ratemeter with Model 43-5 Alpha Scintillator
- Model 12-4 Neutron Counter
- Model 14C ANSI Combined
- Model 15 ANSI Combined
- Model 19 ANSI Combined
- Model 139 Survey Meter with Model 43-32 Alpha Air Proportional Detector
- Model 177 ANSI Combined
- Model 177-41 Alarm Ratemeter
- Model 177-61 Alarm Ratemeter with Model 44-9 Pancake G-M Detector
- Model 375/2 Area Monitor
- Model 2200 ANSI Combined
- Model 2221 Portable SCA
- Model 2224-1 Alpha Beta Scaler Ratemeter
- Model 2241 Digital Scaler Ratemeter
- Model 2241-2 Digital Scaler Ratemeter with Model 44-9 Pancake G-M Detector
- Model 2350-1 Data Logger
- Model 2401-EW ANSI Combined
- Model 2401P ANSI Combined