Model 375-9

Gamma Area Monitor

Part Number: 48-3560

Features

• Integrated Measurement System
• External Ion Chamber Detector
• User-Programmable Alarm Settings
• Audible & Visual Alarms
• Networkable (Requires Ethernet or Webpage Interface Option)

The Model 375-9 Digital Wall-Mount Area Monitor is designed for visibility and ease of use. This monitor provides a fast response to pulsed fields by utilizing an external ion chamber covering any four consecutive decades between 1 μSv/h and 1000 mSv/h (0.1 mR/hr and 100 R/hr). It features a wall-mount chassis and a four-digit LED display that is readable from 9 meters (30 feet) away. Backlit indicators warn of low radiation (yellow), high radiation (red), instrument failure (red), and low battery (yellow), along with an audible alarm. A green status light indicates the instrument is functioning properly.

Parameters are protected under a calibration cover. Calibration is easily accomplished by moving the cal dipswitch to the right, and using the pushbuttons to increment or decrement the calibration constant and alarm point parameters. Parameters are stored in non-volatile memory (retained even with power disconnected). A five-decade logarithmic analog output is provided. A battery backup provides 48 hours of additional use after the primary power is removed.

NOTE: Since the detector is classified as a pressure vessel, users must be careful to follow shipping regulations regarding any shipment of this device.

• Specifications
• Options
• Documents

• Specifications
• Options
• Documents

Specifications

Indicated Use	Areas requiring fast response to pulsed fields
Detector	Type: External Model 45-9 Ion Chamber, user mounted Detector Housing: Aluminum with beige powder-coat finish, 7.6 x 25.7 cm (3 x 10.1 in.) [Dia. x L] Ion Chamber: 17 cm3 volume, stainless steel wall chamber filled with xenon at 1.01 MPa (10 atm) pressure
Operating Range	Typical configuration is 1 μSv/h to 10 mSv/h (0.1 mR/hr through 1 R/hr). Other ranges available are: 10 μSv/h to 100 mSv/h (1 mR/hr through 10 R/hr), or 0.1 mSv/h to 1 Sv/h (10 mR/hr through 100 R/hr). Selection of ranges must be decided at time of purchase. Contact us for further details.
Display	4-digit LED with 2 cm (0.8 in.) character height
Display Units	mR/hr, R/hr, μSv/h, mSv/h
Linearity	Readings with 10% of true value with detector connected
Calibration Controls	Accessible from the front of the instrument (protective cover provided)
Indicators	Status: Green light indicates the instrument is functioning properly Low Alarm: Yellow light and slow beep, can be set at any point from 0.0 to 9999 High Alarm: Red light and fast beep, can be set at any point from 0.0 to 9999 Det Fail: Red light and audible tone; indicates detector overload, no count from detectors, or instrument failure Low Bat: Yellow light, indicates less than 2 hours of battery life remaining
Alarm Audio	68 dB at 0.6 m (2 ft) (3 kHz). Can be configured as a single beep or multiple beeps, with the intensity controlled by rotating the baffle on the device.
RS-232 Output	A 2-second dump for computer data logging
Power	95 to 135 Vac (178 to 240 Vac available), 50 to 60 Hz single phase, 6 V sealed lead-acid rechargeable backup 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
Construction	Aluminum housing with ivory powder-coat finish
Temperature Range	-20 to 50 °C (-4 to 122 °F) May be certified for operation from -40 to 65 °C (-40 to 150 °F)
Size (H x W x L)	18.7 x 24.6 x 6.4 cm (7.4 x 9.7 x 2.5 in.) excluding external detector
Weight	2.9 kg (6.5 lb), excluding detector

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Options

Option	Description	Part Number
Model 375 Series Options	Various options are available for the Model 375 Series including: Enclosures Remote displays Alarm annunciators Signal outputs Software & networking options	Various

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Documents

• Data Sheet
• Product Manual
• Ethernet Manual Addendum (for instruments with ESP32 Ethernet board)
• CE Certificate

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