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Ludlum Model 252

Security Area Radiation Monitor

Features

Range: 0.01 mR/hr to 1000 R/hr
TCP/IP networking with automatic email notification
Standard web browser interface
Data logging to MS SQL database
Optional camera image capturing

Introduction

The Ludlum Model 252 was primarily designed as a security type area radiation monitor intended to watch over highly radioactive materials confined to a protected area. The system incorporates an energy compensated G-M radiation detector with a detection range of 0.01 mR/hr to 1000 R/hr (0.1 μSv/hr to 10 Sv/hr). It also accepts an input signal from an external security type sensor for monitoring doors, seals, or RFIDs.

If the ambient radiation level ever exceeds or falls below set limits, or if the optional remote security sensor is triggered, an alarm is immediately posted through an ethernet connection and via a relay output.

A network of up to 50 security type area monitors can all be monitored simultaneously using Ludlum’s Webpage and Service Software. This system monitors all areas in real time, logs data, and posts any alarms. It can additionally send e-mails to responsible parties automatically and capture picture images if optional ethernet cameras are employed.

While the Model 252’s design is security driven, it can also serve as a simple, low cost area radiation monitor reporting the ambient radiation levels over an ethernet network. The instrument itself has no local readout or display other than a simple LED signalling, whether the instrument is functioning properly or not. Optional alarm annunciators can be added to alert nearby personnel if required.

Outline Drawing

Specifications

PART NUMBER: 48-3733

GAMMA RADIATION RANGE: 0.01 mR/hr to 1000 R/hr (0.1 μSv/hr to 10 Sv/hr)

RADIATION DETECTOR: energy compensated G-M

HIGH ALARM THRESHOLD: adjustable throughout entire detection range, meeting or exceeding threshold triggers relays and ethernet warnings

LOW ALARM THRESHOLD: adjustable throughout entire detection range, radiation levels below threshold triggers relays and ethernet warnings

ETHERNET: RJ-45 connector for 10/100 Base T Ethernet network

EXTERNAL SENSOR: for external intrusion detection, triggers relays and ethernet warning

RELAYS: fail-safe activated form C (common normally open, and normally closed) relays for radiation alarm and tamper conditions, internal tamper microswitch activates relays and ethernet warning whenever the enclosure is opened

LED INDICATORS:

Green = OK

Red = indicates either radiation or tamper/intrusion alarm

CONSTRUCTION: ABS plastic, flammability rated UL94V-0

MOUNTING: wall-mounted using four each #8 screws, not supplied; tamper-proof screws recommended

POWER INPUT: 12 Vdc input (universal wall adapter supplied), 1.0 amp, 12 W maximum

SIZE: 5.3 x 5.7 x 3.8 in (3.5 x 14.5 x 9.7 cm) (H x W x L)

WEIGHT: 3 lb (1.4 kg)

Webpage and Service Software

COMMUNICATION: Uses TCP/IP for basic communication across an Ethernet (LAN) Local Area Network.

SERVICE: Program runs in the background any time the computer is turned on. Allows more complete 24/7 datalogging and webpage access.

WEBPAGE: accessible by any network user with proper permissions using a standard web browser like Internet Explorer or Mozilla Firefox

WEBPAGE WINDOWS:

Current Status - current status and reading of all or selected area monitors

Incident Summary - list of alarms or failure messages of all or selected instruments over a specified time/date range

Timeline Data - graph of a particular instrument’s radiation readings over a specified time/date range

E-MAIL SUPPORT: Alarms can immediately notify responsible personnel. Three sets of 10 e-mail addresses are available separated by shift number and by alarm category.

CAMERA SUPPORT: Optional Ethernet cameras can capture a picture of what triggers the alarm.

Technical Information

Model 252 Data Sheet

Other Ludlum Products

Other Ludlum Products

Ludlum Information

For more information or to request a quotation, please contact us

by phone at: (865) 947-5123 or by email at: sales@deqtech.com.