Monitor 4 and Monitor 4EC

The Monitor 4 and Monitor 4EC are compact general purpose survey meters 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. The Monitor 4EC offers a more accurate linear reading for gamma

Specifications

• Monitor 4- Halogen-quenched uncompensated GM tube with thin mica window 1.5-2.0 mg/cm2 thick.
• Monitor 4EC- Halogen quenched GM tube, energy compensated sidewall 2 mm tin filter. Thin mica window 1.5-2.0 mg/cm2 thick.
• Effective diameter .36"/.92cm • Monitor 4 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% detection efficiency. Detects beta at 150 keV with 75% typical detection efficiency. Detects gamma and x-rays down to 10keV typical through the window, 40 keV minimum through the sidewall dectector. Normal background is approx. 10-20 CPM. Gamma Sensitivity: 1000 CPM/mR/hr.
• Monitor 4EC Energy Sensitivity: Same as Monitor 4 except the energy response 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 (referenced to Cs-137)
• Accuracy: + 10% of full scale (referenced to Cs-137) • Audio Indicator: Internally mounted beeper (can be switched off for silent operation)
• Range Switch: X1, X10, X100, Battery Check
• Operating Range: 0-.5, 0-5, 0-50 hR/hr and 0-500, 0-5000, 0-50,000 CPM
• Optional SI meter scale: 0-500 μSV/hr and 0-50 mR/hr
• Anti-Saturation: Meter will hold at full scale in fields as high as 100 times the maximum reading
• Power Requirements: One 9 volt alkaline battery. Battery life is up to 2,000 hours at normal background radiation levels.
• Temperature Range: -4° F to 131° F (-20° C to 55° C)
• Weight of the Monitor 4: 178 grams (6.3 oz) without battery
• Weight of the Monitor 4EC: 7oz (198.1 grams) without battery • Size: 5.7” x 2.8” x 1.5” (145 x 72 x 38mm)
• Includes: 1 year limited warranty, CE mark, carrying case
• Options: Stainless steel belt clip (attached to instrument)

Radiation Alert Monitor 4..............0695-0050
Radiation Alert Monitor 4EC ..........5250-0046
Radiation Alert Monitor Kit ...........0695-0051
Belt Clip......................................0695-0052