Model 4901P Hand and Shoe Monitor

Pancake G-M Detectors
Microprocessor Based
Alpha/Beta Detection

PART NUMBER:48-3009

INDICATED USE: Personnel monitoring
DETECTORS: Pancake type Halogen quenched G-M in 0.25" lead shield
WINDOW: 1.7 ± 0.3 mg/ cm² mica
ENERGY RESPONSE: Energy dependent
HANDS: 10 ea. (5 per hand)
Active Area - Approximately 75 cm²
Open Area - Approximately 60 cm²
Efficiency(4pi) - Typically 3%-14C, 12%-99Tc, 12%-137Cs
SHOES: 12 ea. (6 per shoe)
Active - Approximately 90 cm²
Open - Approximately 72 cm²
Efficiency(4pi) - Typically 3%-14C, 10%-99Tc, 10%-137Cs
AUDIO: Built in unimorph type speaker (greater than 68 dB at 2 feet)
ALARM: Indicated by red LED’s, and audible signal (each hand and foot has alarm indicators)
COUNTING CAPACITY: 9999 counts per minute
COUNT TIME: Adjustable from 1 – 99 seconds
ALARM HOLD TIME: Adjustable from 1 – 99 seconds
BACKGROUND ACCUMULATE TIME: Adjustable from 1 – 99 seconds
BACKGROUND UPDATE INTERVAL: Adjustable from 1 – 99 minutes. (system will automatically reevaluate background if instrument is not in use)
FORCE UPDATE: Timed function to force background update if regular update interval is exceeded.
READY: (green LED) Indicates instrument is ready to monitor personnel
COUNTING: (green LED) Indicates count is in process (activated by switch in hand cavity)
CHECK OK: (green LED) Indicates person being monitored is under alarm limits
SHORT COUNT: (yellow LED, and continuous audible beep) Indicates user has released hand switches before count is complete or count is attempted during background update.
POWER: 95 - 240 VAC, 50-60 Hz single phase (less than 100 mA )
CONSTRUCTION: Aluminum housing with beige polyurethane enamel paint
TEMPERATURE RANGE: 32°F (0°C) to 122°F (50°C) (LCD limits temperature range)
SIZE: 29.5" (74.9 cm)W X 40" (101.6 cm)H X 15" (38.1 cm)D
WEIGHT: 45 lbs (20.5 kg)