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Monitor 4 Analog Radiation Detectors

Updated:2025-03-13

Brand: SE
Model: Monitor 4
Description: The Monitor 4 is compact, analog radiation detector. A general purpose survey meter capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges. Proven and reliable over decades of us
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Product Details

Monitor 4 Analog Radiation Detectors Description：

Datasheet Procedures

The Monitor 4 is compact, analog radiation detector. A general purpose survey meter capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges. Proven and reliable over decades of use in the industry, the Monitor 4 has evolved into one of the best analog radiation detectors of today. Simple and ergonomic , a red count light flashes and a beep sounds with each count detected. Battery check and silent operation with the flick of your thumb.

Applications & Uses:Checking industrial gauges, such as moisture, density, or level gauges containing Cesium-137, Locating Sources, Personal protection, General surveying

Specifications

Detector	Halogen-quenched uncompensated GM tube with thin mica window 1.5-2.0 mg/cm ₂ thick. Effective diameter of window is 9.1 mm (.36 in.).
Operating Range	0-.5, 0-5, 0-50 mR/hr 0-500, 0-5,000, 0-50,000 CPM or 0-5, 0-50, 0-500 μSv/hr (SI Scale Meter Option)
Range Switch	X1, X10, X100, Battery Check.
Energy Sensitivity	1000 CPM/mR/hr (Cs137). Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%. Detects beta at 50 keV with typical 35% detection efficiency and beta at 150 keV with typical 75% detection efficiency. Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case.
Accuracy	Typically ±15% from factory, ±10% with NIST Source Calibration
Display	Analog Meter holds full scale in fields as high as 100X maximum reading. CPM & mR/hr scale. Optional SI Scale Meter Available
Audio Indicator	Internally mounted beeper (can be turned off for silent operation).
Outputs	3.5 mm jack with pulse out.
Power Requirements	9-volt alkaline battery (included). Approx. 2,000 hrs. at normal background
Temperature Range	-10° to +50°C (14° to 122°F)
Humidity	10% to 70% Non-Condensing.
Weight	M4: 200 g (7.1 oz) M4EC: 224 g (7.9 oz)
Size	209 x 71 x 50 mm (8.2 x 2.8 x 1.9 in.)
Includes	Carrying Case w/ Belt Clip
Options	SI Meter Option, Observer Serial Software
Limited Warranty	1 year limited warranty