PRIMALERT® Digital Doorway Monitor

The Model 05-450 Digital Doorway Monitor is a highly sensitive gamma radiation detection system designed to detect low levels of gamma radiation.

Categories: Fluke Biomedical, Raysafe

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.

Highly sensitive lead shielded NaI (Tl) scintillators
LED digital display
Battery backup

Features

Product in use

Dual detector
Configuration with NEMA enclosures
Fast response time
Audio and visual alarm

Specifications

Product 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)