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Model 2401-S

microR Pocket-Size Survey Meter

Part Number: 48-3117

Features

Integrated Meter with Internal Scintillator Detector
Audio & Visual Alarm
Simple to Use
Low Cost microR meter
Self Contained Instrument

The Model 2401-S is a pocket-sized, self-contained microR ratemeter with an analog display for measuring low-level gamma exposure. The unit utilizes a CsI detector integrated inside the instrument, and comes with a built-in audio and visual alarm. The metallic case, convenient size, and low price make this an ideal tool for checking ambient levels in a wide variety of applications.

Each time the Model 2401-S is turned on, it measures background radiation levels and automatically determines the alarm setting. If the radiation levels exceed this setting, the alarm audio will beep every 1/8 second and the lamp will flash.

Specifications

Indicated Use	Low-level gamma and X-ray survey
Detector	18 mm diameter cesium iodide (CsI) scintillation crystal
Range	0 to 50 µSv/hr (0 to 5000 μR/hr)
Sensitivity	100 cpm per μR/hr
Energy Response	Energy dependent
Meter Dial	0 - 50 μR/hr, BAT OK (others available)
Multipliers	x1, x10, x100
Response Time	Typically 5 s from 10% to 90% of final reading
Alarm	Detected radiation in excess of the alarm point will trigger a red alarm LED and an audible beep, whether in NORMAL or QUIET operating mode
Audio	Click-per-event, may be turned off by moving selector to QUIET position
Power	9 volt battery
Battery Life	Typically 250 hours with alkaline battery
Size (H x W x L)	4.6 x 8.4 x 13.5 cm (1.8 x 3.3 x 5.3 in.)
Weight	0.4 kg (0.9 lb), including battery

Options

Option	Description	Part Number
Model 2401-Series Handle	This convenient L-shaped handle provides a secure and comfortable grip for the Model 2401-Series survey meters.	4397-165
Model 2401-Series Belt Clip	Adds a belt clip to the back of the instrument for ease of carrying.	4397-176
Model 2401-Series Wrist Strap	Adds a wrist strap to the instrument for ease of carrying.	4397-182
Model 2401 Series Hard Case	Rugged case providing crushproof, water resistant, and dust proof protection.	2311119
Model 2401-Series Canvas Case	Canvas case with a zip closure.	2310517

Description	Part Number
CsI Scintillator	01-5661
Photomultiplier Tube	01-5936
Detector Assembly	4397-137