Features
The Model 05-450 Digital Doorway Monitor is a highly sensitive gamma radiation detection system designed to detect low levels of gamma radiation.
The system consists of a digital monitor, 2 shielded NaI (Tl) scintillation detectors with NEMA enclosures, associated cabling and a 10 μCi 137Cs check source. The system is AC powered with internal battery backup and user selectable alarm settings.
Applications
The highly sensitive shielded scintillation detectors of the Model 05-450 Digital Doorway Monitor make this an ideal system to detect and alarm when low levels of gamma radiation pass through a doorway. Your Radiation Safety Officer (RSO) will find it ideal as a monitor mounted on the doorway for hospital entrances, emergency rooms, laundry rooms, waste disposal chutes, nuclear medicine labs and procedure rooms and any other area of the hospital where radiation contamination could be a concern.
Features
- Highly sensitive lead shielded NaI (Tl) scintillators
- LED digital display
- Battery backup
Specifications
Detectors
Two 3 in Ø x 1 in thick (7.6 x 5 cm) shielded NaI (Tl) scintillation detectors with up to 200 ft cables (NEMA 4x enclosures included)
Connectors
BNC (others available on request)
Sensitivity
Will detect an unshielded 40 μCi 137Cs source at 10 ft from the detector and an unshielded 10 μCi 137Cs source at 5 ft from the detector
Functional check source
0.875 in Ø 10 μCi137Cs check source
Display
4 digit LED display with 0.8 in (2 cm) character height
Display units
Can be made to display in μR/hr, mR/hr, R/hr, μSv/h, mSv/h, Sv/h, μrem/hr, mrem/hr, rem/hr, cpm, cps and others
Linearity
Reading within ± 10% of true value with detector connected
Response
Typically 3 seconds from 10% to 90% of final reading
Status
Green light indicates the instrument is functioning properly
Low alarm
Indicated by a yellow light and slow beep (1 per sec) audible tone (can be set at any point from 0.0 to 9999)
High alarm
Indicated by a red light and fast beep (4 per sec) audible tone (can be set at any point from 0.0 to 9999)
Detector fail
(red light and audible tone; > 68 dB at 2 ft) Indicates detector overload, no count from detector, or instrument failure
Low battery
(yellow) Indicates < 2 hours of battery power remaining
High voltage
Adjustable from 200 to 2500 V
Threshold
Adjustable from 2 to 100 mV
Dead time
Adjustable to compensate for dead time of the detector and electronics (can be read on the display)
Overload
Senses detector saturation (indicated by display reading “-OL”)
Over range
Indicates the radiation field being measured has exceeded the counting range of the instrument (indicated by display reading “—-”)
Data output
9 pin connector providing 5 decade log output, RS-232 output, signal ground connection, FAIL and Alarm signals (current sink), and direct connection to battery and ground
Power requirements
95 to 135 VAC (178 to 240 VAC available), 50 to 60 Hz single phase (< 100 mA), 6 V sealed lead acid rechargeable battery (built-in)
Battery life
Typically 48 hours in non-alarm condition, 12 hours in alarm condition
Battery charger
Battery is continuously trickle charged when instrument is connected to line power and turned on
Battery dependence
< 3% change in readings to battery endpoint
Temperature range
- 4º to 122ºF (- 20º to 50ºC). May be certified for operation from – 40º to 150ºF (- 40º to 65ºC)
Size
Electronics 9.7 (w) x 2.5 (d) x 7.4 in (h) (24.6 x 6.4 x 18.7 cm)
Detectors 17 (w) x 8.5 (d) x 13 in (h) (43.2 x 21.6 x 33 cm)
Weight
Electronics 6.5 lb (2.3 kg)
Detectors 32 lb (14.5 kg)
Product Number: 05-450
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