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Ludlum Model 375

Area Radiation Monitor Controller

Introduction

● Digital Area Radiation Monitor Controller

● Supports GM, Proportional, Scintillation, Neutron Detectors

● Programmable Alarms and Units of Measure

● Compact Design, Versatile

● Battery Backup, Networkable

● Optional Remote

● Data Output/RS-232

The Ludlum Model 375 is a versatile, compact and very affordable digital electronic controller designed for monitoring radiation in areas. Its simple design accommodates many different detectors suiting a wide variety of applications, and is equipped with a local readout and alarms. These versatile units may also be connected to an optional auxiliary indicator/annunciators for alerting personnel at remote locations. The user-friendly, digital design enhances setup and operation. These units may also be networked to a central PC-based station where data are logged and alarms posted. This affordable and very flexible system has found its way into many applications resulting in a full complement of detectors, accessories, and options that include remote indicator alarms, printers, relay outputs, weather-proof enclosures, Ethernet networking software, industrial cameras, and more (see Options & Accessories below). Sites requiring centralization of their data can link multiple 375 systems together via Ethernet and view them using a common web browser with the purchase of Ludlum's Webpage & Service Software. This program collects all data in real time, logs data, and annuciates any alarms. The system can also send intelligent e-mail alerts to responsible personnel and capture a picture of whatever triggered an alarm anywhere optional Ethernet cameras are employed. See a live demonstration here and optional live camera here.

Specifications

PART NUMBER: 48-2230

APPLICATION: area radiation monitoring

COMPATIBLE RADIATION DETECTORS: GM, proportional, scintillation, neutron
DISPLAY: four-digit LED display with 0.8 in. (2 cm) digits
DISPLAY RANGE: 000.0-9999
DISPLAY UNITS: 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
RESPONSE: typically three seconds from 10%-90% of final reading
STATUS INDICATORS:

INSTRUMENT STATUS: green light, instrument functioning properly
LOW ALARM: yellow light, slow audible beep (1/sec) audible tone (can be set from 0.0-9999)
HIGH ALARM: red light, fast beep (4/sec) audible tone (can be set from 0.0-9999)
OVERLOAD: senses detector saturation (indicated by display reading “-OL-”)
OVERRANGE: indicates radiation field being measured has exceeded counting range of instrument

HIGH VOLTAGE: adjustable from 200-2500 volts
THRESHOLD: adjustable from 2-100 mV
DEAD TIME: adjustable to compensate for dead time of detector and electronics (can be read on display)
AUDIO: can very from approximately 68 dB to 100 dB through operation of the external rotary baffle and the internal voltage connection

DATA OUTPUT: nine-pin connector providing five-decade logarithmic output, 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)
POWER: a 9 Vdc wall-mount adapter, handles any mains voltage in the world, supplied with four sets of prongs for almost any style wall receptacle
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
CONNECTOR: series “C” (others available)

CONSTRUCTION: wall mount aluminum housing with ivory powder coat paint
SIZE: 7.4 x 9.7 x 2.5 in. (18.7 x 24.6 x 6.4 cm) (H x W x D)
WEIGHT: 4.7 lb (2.1 kg)

CE CERTIFIED: yes

Options & Accessories

Webpage and Service Software (Part Number 1370-077) Radiation network software package that collects and displays radiation levels and alarm status from up to fifty Model 375 type instruments. Using this interface, radiation data may be placed onto the Ethernet network for real-time monitoring, email alerts, and saved into a database. Webpage Hardware Interface (Part Number 4558-105) Data Sheet Product Manual
Ethernet Software (Part Number 1370-055) Monitors and stores data from up to 50 ethernet-enabled Model 375s. Instrument readings and status are displayed on the main screen. Ethernet Hardware Interface (Part Number 4558-098) Data Sheet Product Manual
Logging Software (Part Number 4396-167) Displays readings from the Model 375 in real time and saves the data to a database file. The software will also display a red HIGH ALARM, red DET FAIL, orange LOW ALARM, and a green STATUS button indicating the current status of the instrument. Ethernet Hardware Interface (Part Number 4558-098) Data Sheet Product Manual
Model 271 LED Remote Display (Part Number 48-2475) LED status indicators for STATUS OK, HIGH ALARM and DET FAIL. Sonalert-type speaker. 20 ft cable (Extra Cable: Part Number 8558-139). Power supplied by Model 375. Data Sheet Product Manual CE Certificate
Model 272 Analog Remote Display (Part Number 48-2656) Analog meter dial: 0.1 mR/hr–10 R/hr logarithmic scale. Status indicators for OK, ALARM and FAIL. Sonalert-type speaker. 20 ft cable (Extra Cable: Part Number 8558-140). Power supplied by Model 375. Data Sheet Product Manual CE Certificate
Model 272D Digital Remote Display (Part Number 48-3575) Four-digit LED display: 000.0-9999 with selectable units. Status indicators for STATUS, LOW ALARM, HIGH ALARM, DETECTOR FAIL and LOW BAT. Sonalert-type speaker. 20 ft cable (Extra Cable: Part Number 8558-141). Power supplied by 120-240 Vac with 5.0 Vdc regulated output. Data Sheet Product Manual CE Certificate
Environmental Enclosure (Part Number 4396-068) This option inserts the Model 375 into a sealed, fiberglass, NEMA 4 rated enclosure suitable for outdoor or industrial type environments where water spray is likely to be encountered. Optional Strobe (Part Number 4396-1059). Optional keyed weather-resistant padlock (Part Number 4396-068)
Litestak Assembly Signal Enclosure (Part Number 4396-1001) Remote indicator for the Model 375. Includes 10 ft cable. (Extra Cable: Part Number 8396-1003)
Strobe (110 V - Part Number 4558-147; 220 V - Part Number 4558-148) 50 ft Cable, Mains Relay Box, output on 3 pin Hirose connector. Horn (110 V - Part Number 4558-149; 220 V - Part Number 4558-150) 50 ft Cable, Mains Relay Box, output on 3 pin Hirose connector. Strobe & Horn (110 V - Part Number 4558-145; 220 V - Part Number 4558-146) 50 ft Cable, Mains Relay Box, output on 3 pin Hirose connector.
Printer (Part Number 4558-185) with Date/Time stamping capability. 4.2 x 7.1 x 3.5 in. (W x D x H) 1 lb. Includes 20 ft RS-232 printer cable, paper roll, ribbon cassette, AC Adapter and manual.
Industrial Camera (Part Number 2311120) with high speed IP video and 1280 x 1024 resolution. 2.9 x 3.5 x 1.7 in. (H x W x D) 9 oz. Low-light performance, user-selectable exposure window, low power usage, multi-zone motion detection and digital pan, tilt and zoom. Simple to install and support. Optional Indoor/Outdoor Camera Housing (Part Number 21-9068)
Output Options Form C, Single Pole, Hi Alarm via 3 pin Hirose connector (Part Number 4396-201) Dual Form C, Single Pole, via dual 3 pin Hirose connectors (Part Number 4396-501) Mains Relay, via 3 pin Hirose connector (Part Number 4396-202) Isolated 4-20 mA output (Part Number 4396-258)