Please note our Western and Central Canadian offices will be open for a half day on December 24, closed on December 25, 26, 31 and January 1st. We will be open on December 27, 30, and January 2nd. Happy Holidays!
- Home
- All Products
- Model 52-1, 52-5 & 52-6 Series
Model 52-1, 52-5 & 52-6 Series
Features
- Portable
- 61 cm (24 in.) or 81.3 cm (32 in.) Wide Opening
- Plastic Scintillator Detectors
- Built-in Person Counter
- Background Updating and Subtraction
- Sets Up In Minutes
- Easy to Operate
- Wheeled Transport Case Included
- Meets FEMA-REP-21
- Includes Sleeve for Weather Protection
The Model 52-1, 52-5, and 52-6 Series Portal Monitors are used for beta-gamma personnel contamination monitoring and meet the FEMA standard for Emergency Response Portal Monitoring (FEMA-REP-21). They are designed to be disassembled for ease of transportation and storage and can be set up in five minutes or less without any tools.
The non-volatile parameters are preset at the factory to detect a 1.0 μCi 137Cs source in a 10 μR/hr background field. The electronics are microprocessor-based for ease of setup and reliability. Status LEDs indicate count-cycle status. Audible signals accompany the LEDs for additional indication. Detector counts, background, and all parameters may be viewed on the Liquid Crystal Display (LCD). All setup is accomplished by way of pushbuttons located below the LCD.
These portal monitors can be operated in a walk-through basis with a quick scan occurring while a person is positioned within the portal. In this mode, checking is performed every 200 milliseconds while the portal is occupied, and 600 milliseconds before and 600 milliseconds after the portal is occupied. The portal monitor can also monitor in a stop-and-count mode, allowing for a more sensitive scan. In stop-and-count mode, the fixed count time may be set from 1 to 20 seconds.
These instruments have automatic background update and dynamic alarm setting capabilities. On startup, the instrument will take a background count and calculate alarm levels for each detector. Self-diagnostic routines check the background count and warn if the background becomes either too high or too low.
Alarms are calculated with a user-adjustable sigma parameter and the current background count. During setup, the user can also specify individual alarms only, sum alarm only, or both individual and sum alarm. The sum alarm groups upper detectors and lower detectors.
A polypropylene weather sleeve is included to protect against wet weather conditions. These instruments are able to operate from 85 to 250 Vac 50/60Hz without a voltage selector switch. They may also be powered from the supplied vehicle cigarette lighter adapter, or three or six “D” cell batteries.
Vehicle Monitoring
The Model 52-1, 52-5, and 52-6 Series can also be used as vehicle monitors using the optional vehicle conversion kit. See the Options tab for more information.
Water-Resistant Versions
Ludlum also offers some water-resistant versions: Model 52-1W (P/N 48-4300), Model 52-1-1W (P/N 48-3516) and Model 52-6-1W (P/N 48-4312). See the data sheets on the documents tab for more information. (Note: The water-resistant versions can only be used for gamma contamination monitoring.)
Download Datasheets
- Model 52-1 Data Sheet
- Model 52-1W Data Sheet (water-resistant version)
- Model 52-1-1 Data Sheet
- Model 52-1-1W Data Sheet (water-resistant version)
- Model 52-5 Data Sheet
- Model 52-5-1 Data Sheet
- Model 52-6 Data Sheet
Related Products
Headphone Jack
This modification for survey meters adds a headphone jack to the instrument body so headphones can be used to monitor click-per-event audio and audio alarms. Headphones are helpful when the instrument is being used in areas with high ambient noise levels or in areas where the audio would be distracting to others, such as in a medical or office environment.
Shoulder Strap
This 1.8 m (6 ft) adjustable shoulder strap is a great way to keep your hands free while operating survey meters. The nylon strap with a wide rubber comfort pad can also be helpful for conveying some of the heavier instrument/detector combinations in the field.
Model 3-IS NORM Kit
- Ready-to-Go Kit in Rugged Case
- Intrinsically Safe Analog Survey Meter
- Measures Alpha, Beta, and Gamma Contamination
- Includes:
- Model 3-IS Intrinsically Safe Survey Meter
- Model 44-9 Alpha-Beta-Gamma Detector
- Model 44-2 High Energy Gamma Detector
- Check Source, Cable, Batteries, Transport & Storage Case
Model 14C-MERK
Medical Environment Response Kit
- Model 14C Survey Meter
- Model 44-2 Gamma Scintillator Detector
- Model 44-9 Alpha-Beta-Gamma GM Detector
- Model 25 Series Personal Radiation Monitor
- Check Source and Holder
- Rugged Case
Model 2241-3MERK
Medical Environment Response Kit
- Model 2241-3 Scaler-Ratemeter
- Model 44-2 Gamma Scintillator Detector
- Model 44-9 Alpha-Beta-Gamma GM Detector
- Model 44-142 Beta Scintillator Detector
- Model 25 Series Personal Radiation Monitor
- Check Source and Holder
- Rugged Case
Model 3001-MERK
Medical Environment Response Kit
- Model 3001 Survey Meter
- Model 44-2 Gamma Scintillator Detector
- Model 44-9 Alpha-Beta-Gamma GM Detector
- Model 44-142 Beta Scintillator Detector
- Model 25 Series Personal Radiation Monitor
- Check Source
- Rugged Case
Model 14C-RK
Emergency Response Kit
- Model 14C Survey Meter
- Model 44-2 Gamma Scintillator Detector
- Model 44-9 Alpha-Beta-Gamma GM Detector
- Check Source and Holder
- Rugged Case
Cables
Ludlum offers straight cables with either type C, BNC, SHV, MHV, or UHF connectors. Unless specified otherwise, Ludlum survey meters and detectors are shipped with “C” type connectors. When a meter and accompanying probe are ordered as a matched set, Ludlum automatically includes a 99 cm (39 in.) straight-type cable with “C” connectors at no additional charge. (Note: We no longer offer coiled cables.)
Model 3002/FM Series
Alpha-Beta Floor Monitor
- Alpha-Beta Scintillation Detectors
- Active Window Area: 400 or 1080 cm2 (62 or 167.4 in2)
- 22.4, 40.9, or 65.7 cm (8.8, 16.1, or 25.9 in.) Wide Detection Path
- Adjustable Detector Height
Model 42-38
WENDI-2 Wide Energy Neutron Detector
- Detector Type:
- 3He Tube
- Moderator: 22.9 cm (9 in.) dia.
- Sensitivity (241Am/Be): 450 cpm per mrem/hr
- Detection Range: Thermal to 5 GeV
Model 78-6
Stretch Scope Survey Meter
- Analog + Digital Meter
- Extends to 3.6 m (12 ft.)
- NaI(Tl) Scintillator Detector
- Range: 0.01 to 50 µSv/h (1 to 5000 µR/hr)
Model 79/2
Stretch Scope Survey Meter
- Digital Meter
- Extends to 4.5 m (14.75 ft.)
- Internal Energy-Compensated GM
- Range: 0.001 mSv/h to 0.04 Sv/h (0.1 mR/hr to 4 R/hr)
Model 79/1
Stretch Scope Survey Meter
- Digital Meter
- Extends to 4.5 m (14.75 ft.)
- CsI(Tl) Scintillator Detector
- Range: 0.01 µSv/h to 500 µSv/h (1 µR/hr to 50 mR/hr)
Model 79
Stretch Scope Survey Meter
- Digital Meter
- Extends to 4.5 m (14.75 ft.)
- Energy-Compensated GM Detector
- Range: 10 µSv/h to 10 Sv/h (1 mR/hr to 1000 R/hr)
