Model 375P-3500

Conveyor Monitor

Part Number: 48-3628

Features

Electronics:

• User-Adjustable Alarms
• Electronics Housed in a NEMA 4X Enclosure with External Reset Button
• See-Through Viewing Window
• Supplied with Mains Relay that Can be Used to Stop Conveyor on Alarm, or for Connecting Optional Red Alarm Strobe
• 24-Hour Battery Backup (in Non-Alarm Condition)

 Detector:

• Large Size Plastic Scintillation Detector
• High Sensitivity
• Industrial Duty
• Weathertight, Lead-Shielded Enclosure

Protecting steel mills against entry of loose radiation sources that can potentially contaminate them requires diligent attention. Failure can cost millions in fines and clean-up expenses. Ludlum's conveyor monitor offers added assurance by inserting a second line of defense.

Gateway monitors employed at the entrance to most facilities used to scan trucks and vehicles represent the first line of defense. These gateway systems are highly effective and catch loose sources before they enter your site. As any radiation detection expert knows that despite the effectiveness of the systems, they can be stretched to the limits of their ability whenever called upon to detect weaker sources deeply embedded and highly shielded in the middle of a large load.

The conveyor radiation monitor has a huge advantage over gateway systems in that it allows the radiation detector to be exposed a few inches, not feet, from each piece of scrap while traveling under highly controlled conditions. This type of a scan offers an optimum geometry and enhances detecting even weaker sources with much greater probability. The likelihood of escaping detection at this secondary process becomes highly remote. It is a small price to pay for detecting any sources which may have escaped attention at the entry point.

Ludlum's conveyor radiation detection system employs its standard Model 3500 scintillator detector which is identical to that used in its popular gateway systems (see Model 4525-Series). This detector delivers superior sensitivity while supplying commonality of parts and operation familiarity. 

To reduce costs without compromising performance, the 375P-3500 system also utilizes Ludlum's highly popular Model 375 type controller that controls the detector, updates background, and carefully monitors the passing scrap metal. The controller can operate totally independently, or be wired for remote annunciation, or connected to an Ethernet network (requires Ethernet hardware interface option). The Model 375P Controller is not weatherproof and must be mounted either indoors or within an environmental enclosure (available separately, see Options).

Model 375P-3500 system includes:

• 1 ea. Model 375P electronics
• 1 ea. 57.4 L (3500 in³) plastic detector with 15.2 m (50 ft) cable
• 1 ea. 10 µCi check source

Optional Accessories include:

• 12.7 cm (5 in.) diameter red alarm strobe with 15 m (50 ft) cable
• 40 column date/time printer
• Model 271 wired remote display
• Ethernet kit

• Specifications
• Options
• Documents

• Specifications
• Options
• Documents

Specifications

Indicated Use	Monitoring for radioactive material
Detector	1 ea. 57.4 liters (3500 in3) plastic scintillation detectors with 0.32 cm (0.125 in.) lead shielding in weathertight housing
Display	4-digit LED display with 2 cm (0.8 in.) digits
Range	0.1 to 9999 kcps
Linearity	Reading within 10% of true value
Status	Green light, instrument functioning properly
Sigma Alarm	Red ALARM light and adjustable audible tone, can be set at any point from 0.0 to 999 sigma
Sum Alarm	(for 2 detector system) indicated by red ALARM light and adjustable audible tone, can be set at any point from 0.0 to 9999 kcps
Alarm Response Time	2 seconds or less, based on internal dip switch setting
DET Fail	Red light and audible tone (greater than 68 dB at 61 cm [2 ft]), indicates no counts from detector or instrument failure
Low BAT	Yellow light, indicates less than 2 hours of battery power remaining (when AC power is off)
Overrange	Indicates radiation field being measured has exceeded counting range of instrument (indicated by display reading “——”)
Relay Output	Mains (120 or 240 Vac) output on alarm
Data Output	9-pin connector providing RS-232 output, signal ground connection, FAIL and ALARM signals (current sink), and direct connection to battery and ground
Calibration Controls	Accessible from front of instrument (protective cover provided)
Temperature Range	-15 to 50 °C (5 to 122 °F) May be certified to operate from -40 to 65°C (-40 to 150 °F)
Power	95 to 135 Vac (178 to 240 Vac available), 50 to 60 Hz single phase (less than 100 mA), 6-volt sealed lead-acid rechargeable battery (built in)
Battery Life	Typically 24 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	Stainless steel enclosure with aluminum door, with white powder-coat finish
Environmental Rating	Electronics: IP51 (IP66 with Model 375P environmental enclosure) Detectors: IP66
Size	Electronics (H x W x L)	26.2 x 24.6 x 3.3 cm (10.3 x 9.7 x 3.3 in.)
	Detectors (H x W x L)	208 x 62 x 23 cm (82 x 24.5 x 9 in.)
Weight	Electronics	4.2 kg (9.3 lb)
	Detector	295 kg (650 lb)

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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
• Model 375P-1000 Alarm Point Setting Guide

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