All models feature internal GM (Geiger-Mueller) detector for greater handling ease, anti-saturation circuitry, and red count light.
- Audible beeper can be switched on or off
- Built-in battery check, long battery life
- Carrying case is included
Monitor 4—Meter detects alpha, beta, gamma, and x-rays utilizing an uncompensated halogen-quenched GM tube with a 1.5–2.0mg/cm2 mica end window
Monitor 4EC—The Monitor 4EC is the Monitor 4 with an energy compensated GM detector.
Typical efficiencies using 2[pi] geometry are:
Smallest detectable level of 125I is approx. 0.02µCi. Recommended detection levels for 125I is 0.5mCi and up. Gamma sensitivity is 25cps/mR/hr.
Analog meter reads 0–0.5, 0–5, 0–50mR/hr. or 0–50,000cpm, in three settable ranges. Audible beeper can be turned off.
cpm: 22,000 [source Sr-90 (0.0201 µCi)], 14,000 [source Tc-99 (0.043 µCi)], 17,000 [source C-14 (0.130 µCi)]
- Catalog No:
- 55408-553
- 55408-531
- 55408-576
- Energy:
- 0.200–0.544 MeV [source Sr-90 (0.0201 µCi)], 0.085–0.295 MeV [source Tc-99 (0.043 µCi)], 0.049–0.151 MeV [source C-14 (0.130 µCi)]
- 0.200–0.544 MeV [source Sr-90 (0.0201 µCi)], 0.085–0.295 MeV [source Tc-99 (0.043 µCi)], 0.049–0.151 MeV [source C-14 (0.130 µCi)]
- 0.200–0.544 MeV [source Sr-90 (0.0201 µCi)], 0.085–0.295 MeV [source Tc-99 (0.043 µCi)], 0.049–0.151 MeV [source C-14 (0.130 µCi)]
- Efficiency:
- 49% [source Sr-90 (0.0201 µCi)], 33% [source Tc-99 (0.043 µCi)], 21% [source C-14 (0.130 µCi)]
- 49% [source Sr-90 (0.0201 µCi)], 33% [source Tc-99 (0.043 µCi)], 21% [source C-14 (0.130 µCi)]
- 49% [source Sr-90 (0.0201 µCi)], 33% [source Tc-99 (0.043 µCi)], 21% [source C-14 (0.130 µCi)]