Keterangan :

Pocket-sized monitor with meter, LED count light, and beeper
• Monitors alpha, beta, gamma, and x-ray radiation
• Dual-scale analog meter ( CPM and mR/ hr)
• Operating range: 0-50 mR/ hr, 0-50, 000 cpm
• Multiplier selections: x1, x10, x100
• Red LED flashes with counts
• Audible beep indicates rising radiation level
• Operates up to 2, 000 hours on 9V battery
• Weighs less than 9 ounces ( including battery)

The Monitor 4 Survey Meter is lightweight, ergonomically designed and includes its own carrying case. Used to measure alpha, beta, gamma and x-ray radiation, it provides extremely accurate results with both audible and visual indication. The easy-to-read scale features three ranges for maximum sensitivity and runs up to 2, 000 hours on a 9V battery.

Specifications
Detector: Halogen-quenched uncompensated GM tube with thin mica window 1.5-2.0 mg/ cm2 thick

• Energy Sensitivity: 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% efficiency
- Detects beta at 150 keV with typical 75% efficiency
- Detects gamma and x-rays down to 10 keV typical through the end window, 40 keV minimum through the case
• Accuracy: ± 15% of full scale ( referenced to Cs-137)
• Visual Indicators: .875" x 1.75" ( 2 x 4 cm) dual scale analog meter, marked 0-500 cpm and 0-0.5 mR/ hr; LED count light
• Audio Indicator: Internally mounted beeper ( can be switched off for silent operation)
• Range Switch: x1, x10, x100, battery check
• Ranges: 0-500, 0-5, 000, 0-50, 000 cpm and 0-0.5, 0-5, 0-50 mR/ hr
• Current Drain: Typically 190µ A at background radiation levels
• Operating Voltage Range: 7-11 Volts DC
• Voltage Regulation: High and low voltage fully regulated
• Power Requirement: One 9-volt alkaline battery, NEDA # 1604A, or equivalent
• Battery Life: Up to 2, 000 hours at normal background radiation levels
• Temperature Range: -4° F to + 131° F ( -20° C to 55° C)
• Dimensions: 8.25" x 2.75" x 1.87" ( 210 x 70 x 48 cm)
• Weight: 9.7 oz ( .28 kg) including battery, 7.2 oz ( .21 kg) without battery

Display: 4-digit liquid crystal display with mode indicators

Operating
Range: mR/ hr: .001 to 100.0
CPM: 0 to 300, 000
mSv/ hr: .01 to 1, 000
CPS: 0 to 5, 000
Total: 1 to 9, 999, 000 counts

Gamma Sensitivity:
3500 CPM/ mR/ hr referenced to Cs-137
Smallest detectable level for I-125 is .02 mCi at contact

Efficiency: For 4 pi geometry at contact

Alpha
Am-241 ( 5.5 MeV) : 18%

Timer: Can set 1-10 minute sampling periods in one-minute increments, 10-50 minute sampling periods in 10-minute increments, and 1-24 hour sampling periods in 1-hour increments

Alert:
Beeper sounds the alert
User-adjustable alert level is set using three buttons
Accuracy: ± 15% up to 50 mR/ hr; ± 20% up to 100 mR/ hr
Anti-Saturation: Readout holds at full scale in fields up to 100 times the maximum reading

Temperature Range: -20º to + 50º C, -4º to 122º F

Power: One 9-volt alkaline battery; battery life is average 2160 hours at normal background, average 625 hours at 1 mR/ hr with beeper off

Size: 150 x 80 x 30 mm ( 5.9" x 3.2" x 1.2" )

Weight: 350 grams ( 11.4 oz) including battery

Count Light: Red LED flashes with each radiation event

Audio: Beeper beeps with each radiation event; can be muted

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