375P-1000 Landfill Monitor

Outdoor Radiation Monitoring System

375P-1000 Radiation landfill monitor

Features

The Model 375P-1000 is a digital Model 375 Controller coupled to two shielded 7866 cm 3 (480 in 3) plastic scintillator detectors. The detectors are encased in weathertight enclosures suitable for the outdoor environment. The Model 375 Controller is not weatherproof and must be mounted either indoors or within an environmental enclosure (available separately, see Options). This cost-effective solution offers a simple system that is easy to operate and maintain.

The system continuously monitors background levels and will alert the user when the infrared sensors detect a contaminated object. Once the object is removed, the system will return to normal (background) monitoring.

The controller supplies local alarms, but can also be connected to external alarms or even put onto an Ethernet network if desired. In addition, a 24-hour battery backup keeps the system operational in the event power is lost.

See Model 375 for additional detail and available options.

Medical Application

This system is ideal for inspecting outgoing trash and/or medical waste for possible low-level radioisotope contamination. It will easily pay for itself in the prevention of just one contaminated shipment. Fines assessed by the various regulatory agencies may be significantly more than the cost of installing this monitor at your facility.

Surface Contamination Inspection

Inspecting items using hand-held instruments can be too time-consuming in many cases. The Model 375P-1000 facilitates a more rapid and uniform inspection by placing two relatively large scintillation detectors in proximity to the incoming or outgoing articles under inspection. Both detectors are continuously monitored by the digital controller so any offending item can immediately trigger an alarm. Alarm conditions can be set up to automatically halt production conveyance devices, notify the central office, and even alert key personnel to initiate an immediate response.

Vehicle Radiation Monitor

The Model 375P-1000V (Part Number: 48-3782) variant is also available. This system includes vehicle presence sensors that prevent the unit from alarming unless a vehicle is being surveyed and the alarm threshold has been exceeded.

Detector 2 ea. 7866 cm3 (480 in3) plastic scintillation detectors with 0.33 cm (0.13 in.) lead shielding in weathertight housings
Typical Sensitivity (137Cs) 400 cps per µR/hr per detector
Display 4-digit LED display with 2 cm (0.8 in.) digits
Range 0.0 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)
Power 95 to 135 Vac (178 to 240 Vac available), 50–60 Hz, 6 V sealed lead-acid rechargeable battery (built-in)
Battery Life Typically 24 hours in non-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
Temperature Range -15 to 50 °C (5 to 122 °F)
Size Electronics (H x W x L): 26.2 x 24.6 x 8.4 cm (10.3 x 9.7 x 3.3 in.)
Detectors (D x L): 20.3 cm x 183 cm (8 x 72 in.) (each)
Weight Electronics: 4.2 kg (9.3 lb)
Detectors: 29.5 kg (65 lb) (each)

Ludlum Model 375P-1000 manual

Manual