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Monitor 4 Geiger Counter. SE International Monitor 4
Monitor 4 Geiger Counter. SE International Monitor 4

Monitor 4 Geiger Counter Kit

$299.95 $249.95

Monitor 4 Geiger Counter Kit – CK0106.  Soldering required.

This high-quality Geiger Counter is a compact, analog, ergonomic, general purpose survey meter capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges. A red count light flashes and audible beep sounds with rising radiation levels.  SE International Monitor 4Kit

Product Description

Monitor 4 Geiger Counter Kit – CK0106

Build your own Geiger Counter!  This high-quality Geiger Counter Kit is a compact, analog, ergonomic, general purpose survey meter capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges. A red count light flashes and audible beep sounds with rising radiation levels.  SE International Monitor 4Kit

Note: This is a solder kit.  For a fully assembled version of this circuit please see our part number CK0106A

Halogen-quenched uncompensated GM tube with thin mica window 1.5-2.0 mg/cm2 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)

Energy Sensitivity: 1000 CPM/mR/hr (Cs137). M4EC is the same as M4 except the energy response for gamma and x-rays through the detector sidewall is flat within +61% or -26% over the range of 40 keV to 100 keV, and within +35% or -17% over the range of 100 keV to 1.3 MeV. M4 & M4EC meter scales shown below.
Both Detect beta at 50 keV with typical 35% detection efficiency and beta at 150 keV with typical 75% detection efficiency.

Accuracy: Typically ±15% of reading (Cs137)

Energy Response Curve: Monitor 4: Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%. Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case.

Range Switch:  X1, X10, X100, Battery Check. Meter Face Options

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).

Power Requirements: 9-volt alkaline battery. Approx. 2,000 hrs. at normal background

Temperature Range:  -20° to 55°C (-4° to 131°F)

Weight: M4: 200 g (7.1 oz)

Outputs: 3.5 mm jack with pulse out.

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 Software, Mini-USB Option w/ USB Observer Software (Call)

Monitor Kits: THIS IS A ELECTRONIC KIT THAT REQUIRES SOLDERING.  Build your own Monitor 4! Learn about how a geiger counter works!

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