LUDLUM releases general purpose, digital and/or analog ratemeter with a built-in scaler that facilitates timed counts over a user specified period. Some of the models also comes with switchable between ratemeter mode and scaler mode.
Scalers Ratemeters

Model 2241
Digital Ratemeter with Built-In Scaler Supports GM, Proportional & Scintillation Detectors Auto-Ranging Digital Meter

Model 2241-2
Model 2241 with Store Up To 2 Detector Set-Ups

Model 2241-2i
Model 2241-2 with Internal Energy-Compensated GM Detector Range: Up To 4 R/hr

Model 2241-2i/2
Model 2241-2i with Internal Energy with Range Up To 1 R/hr

Model 2241-3
Model 2241 with capacity to Store Up To 4 Detector Set-Ups

Model 2241-3i
Model 2241-3 with Internal Energy-Compensated GM Detector Range: Up To 10 R/hr

Model 2242
Gamma Exposure Scaler-Ratemeter 2 Internal Energy-Compensated GM Detectors Range: 0.1 mR/hr to 999.9 R/hr

Model 2221
4-Range Analog Meter With Digital LCD Single Channel Analysis Dual Analog Meter & Digital LCD Presentation

Model 2224-1
Alpha-Beta Scaler-Ratemeter Simultaneous Alpha-Beta Counting 4-Range Analog Meter With Digital LCD Supports Alpha-Beta Proportional & Scintillator Detectors