Recent Product Introductions

Model 26-1 Integrated Frisker

The Ludlum Model 26-1 incorporates electronics and a time-tested GM (Geiger-Mueller) detector in an ergonomically designed, ruggedly-constructed, and water-resistant housing. The integrated unit is therefore cable-less thereby simplifying the process of frisking people and objects. The optimized configuration includes a standard 15 cm² GM pancake, loud audible “click” output, and large auto-ranging LCD display with automatic LCD backlighting. Model 26-1 has the addition of a Units button that can display measurements in terms of mR/hr, µSv/h, dpm, or Bq. These features are combined in one convenient package making it easier than ever to detect alpha/beta contamination and measure gamma fields on personnel and objects. Learn more here.

Model 43-143 100 cm² Gas Flow Proportional Detector

This new design is an equivalent to the Eberline HP-100 and is used for alpha/beta contamination measurements wherever a steady supply of P10 counting gas is available. The gas is supplied up through the detector signal cable so no additional gas feed lines are needed making its use just like any other external probe. The counting gas and signal are combined at an adaptor which is available separately.

Another nice feature of this design is the removable faceplate which simply slides off to facilitate quick replacement of the window anytime it's needed.

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Two New Digital Ion Chambers

Ludlum now offers two pressurized ion chambers built on its all new digital platform it calls "Dimension." Both ion chambers include large color LCD's, data logging, auto zeroing, alarming, USB connectivity, rechargeable batteries and more.

Both instruments also cover the identical measurement range of 0-500 mSv/h or 0-50 R/hr (unit selectable); with the differences being as follows:

Model 9DP:
- pressurized to 117 PSI delivering maximum sensitivity

Model 9DP-1:
- pressurized to 25 psi which does not have any HAZMAT restrictions
- works well in pulsed fields and correctly integrates 50 nanosecond pulses (and wider)

Learn more about the Model 9DP....

Learn more about the Model 9DP-1.....

Model 9DP

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Model 26 Integrated Pancake Frisker

The Model 26 Frisker combines the industry standard 15 cm² GM pancake probe with the electronics and batteries all into one convenient probe-like style. The probe enclosure is constructed from durable plastic and covered in a rubberized coating to provide added water resistance, a better grip, and improved drop protection. This design eliminates cumbersome cables and two-handed operation, reduces cost, and is very simple to use. The Model 26 design is ideal for measuring contamination and displays either cpm or cps. The dual "AA" size batteries will power the instrument for 1000 hours. The Model 26 also features programmable alarms, a built-in scaler, and a Max Hold mode.

Model 732 & 733 PC-Based Gamma MCA System

Ludlum now offers a PC-Based MCA to its growing line of isotope identifiers. Two new systems are offered; the Model 732 based on a 2 x 2 inch NaI detector, and the Model 733 which supplies a 3 x 3 inch NaI detector. Both detectors are powered through the USB connection to the PC. Ludlum supplies a very basic and user-friendly software program that can be installed on the user-supplied PC to facilitate spectrum acquisition and analysis.

Model 54A Small(er) Article Contamination Monitor

For applications not requiring the larger 4.6 cubic foot volume, Ludlum now also offers the smaller Model 54A incorporating a 1 cubic foot volume that will take up less space and yet accommodate many different articles exiting controlled areas. The smaller Model 54A system is almost identical to its big brother except it only incorporates a single door and utilizes a smaller sized touch screen. The design is still based upon a true 4π geometry and is available with either 1 or 2 inches of lead.

Model 375/1 Area Monitor

The Model 375/1 Digital Wall-Mount Area Monitor is designed for visibility and ease of use. This monitor incorporates an internally housed 18 mm CsI scintillator with a sensitivity of approximately 120 cpm/uR/hr. It features a wall-mount chassis and a four-digit LED display that is readable from 9 meters (30 feet) away. Backlit indicators warn of low radiation (yellow), high radiation (red), instrument failure (red), and low battery (yellow), along with an alarm. A green status light is a positive indication of instrument operation.

Model 78-9

The Model 78-9 Stretch Scope telescoping beta-gamma survey meter allows the user to determine surface activity from a distance and reaches areas that are difficult to access with other hand probes. The detector employed is Ludlum's Model 44-9-21 and is removeable from the pole which extends out to 3.6 m (12 ft). A thumbscrew at the end of the pole firmly attaches the detector into place

Model 2401-P Dose

This unique analog instrument houses a GM pancake for measuring contamination that then can be converted over to measure ambient equivalent dose via a filter that slides over the detector. The filter flattens the energy response to within 20% referenced to ¹³⁷Cs over an energy range of 20 keV to 1.2 MeV.

Model L-DeCon Series Decontamination Kits

Ludlum offers two decontamination kits for responding to spills and leaks. These kits offer essential items including labeling materials, protective clothing, decontamination solvents and cleaning supplies, etc. The packing drum also serves as the disposal container. Options are also available that can be added to suit additional needs.

Model 4404-16-4 Backpack Size Geo-Explorer

This compact size instrument conveniently fits inside a user-supplied backpack to better facilitate surveys in the field when looking for oil and gas deposits underneath the surface. The system employs a 7.6 x 7.6 cm (3 x 3 in.) NaI detector that is battery operated and transmits its signal via Bluetooth wireless, thereby avoiding any interconnecting cables. With Ludlum's Geo-Explorer software running on your laptop PC, data can be viewed in real time while it is being recorded. The system also accepts a GPS signal to identify the exact position of each set of data.

Model 2100 Conveyorized Sample Monitor

Ludlum has developed an automated gamma sample counter designed to check steel slug samples. This system incorporates a lead-shielded NaI(Tl) detector, conveyor, and controller to facilitate a fully automated process. A backlit, color LCD touch screen presents the results and allows configuring the system parameters. The unit includes an Ethernet port for real-time reporting and two USB ports for connecting external ID input devices. The monitoring process is fully automated. Once a sample is loaded onto the inlet conveyor, built-in sensors automatically activate the conveyor, which delivers the sample to the detector system. Following the count, the source is automatically conveyed until it falls off the conveyor into a storage container (not supplied).

Energy Compensation Filters for the Model 44-9 GM Pancake

Ludlum is pleased to present two new energy compensation filters for the venerable Model 44-9 GM pancake probe that correct the over-response at low energies when making measurements for exposure or ambient equivalent dose. These filters flatten the energy response to within 20% across an energy range of 33 keV to 1.2 MeV for exposure and 20 keV to 1.2 MeV for ambient equivalent dose. They simply snap into place anytime you wish to make measurements other than CPM.

Stick-On Check Source Holder

Ludlum now offers a stick-on type check source holder that fixes the check source to the side of an instrument by means of an industrial strength adhesive. This novel approach saves money and is mandatory for any intrinsically safe type instruments. It requires use of Ludlum's new thinner 0.025 (0.010 in.) thick type sources.

Model 53 Gamma Portal Monitor

This is the all new Model 53 gamma portal monitor that is squarely aimed at the nuclear power plant market. It incorporates the latest Ludlum scintillation detector and electronics technology. This ultra-modern design is highly sensitive, includes three different count modes, can be connected to a network, and much more.

Model 44-110-2 Low Energy Sample Counter Detector

This is a windowless gas flow detector used for measuring very low energies. It works in combination with Ludlum's Models 2000, 2200, and 2929 Sample Counter Electronics.

Model 44-183 Shielded GM Detector

This detector facilitates gamma surveys in high backgrounds using a shielded GM detector with a 10:1 ratio between the face and background readings.

Model 54 Small Article Monitor

This monitor ensures small articles leaving controlled radiation areas are not contaminated. It comes standard with 2.5 cm (1 in.) lead shielding, four detectors, and one user interface. Options for 5.1 cm (2 in.) shielding, six detectors, and a second interface for bi-directional operation are available. Incorporates new industry algorithms to produce the most statistically sound decisions in the shortest count time possible. Utilizes a state-of-the-art touch screen graphical interface and user-friendly presentation that make this unit simple to operate, set up, and maintain.

Model 9-4 Ion Chamber

This air ionization chamber measures beta-gamma dose rate from 0–50 R/hr. The design is nearly identical to the previously released Model 9-3 (see below) with the following differences:

Pressure compensated in addition to temperature
Computer calibration
No audio pulsed output

The Model 9-4 is housed in Ludlum's traditional rugged housing with rolled steel handle, tempered glass analog meter cover, and separate battery compartment.

Model 4906A Hand & Foot Monitor

Utilizes air proportional probes for alpha contamination detection on hands and feet. Slick design employs new electronics, touch screen graphical interface, and facilitates all maintenance from the front. Some of the other features include voice prompting, one-handed operation mode, and Ethernet connectivity. This instrument will be able to accommodate gas flow proportional detectors and plastic scintillators for alpha and beta detection in the future for anyone interested.

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Geo-Exploration System

The Ludlum Model 4404-16 Geo-Exploration System provides radiation surface measurements to help discern the underlying geology. This instrument serves as an excellent oil exploration and ore prospecting tool. Its high sensitivity also facilitates large area surveys when looking for radioactive contamination.

Intrinsically Safe Product Line

In response to a growing need within the indusrty, Ludlum has created a line of intrinsically safe radiation detection instruments for use in potentially explosive atmospheres. This growing line of instruments have been designed and tested to meet the demanding criteria for intrinsic safety as called for by the list of US standards.

Model 9-7 High Range Ion Chamber

Here is the solution for replacing your discontinued Eberline RO-7. Ludlum's 9-7 accepts existing Eberline ion chamber probes and accessories, operates similarly to reduce training, and offers the same rugged quality; however, it is a new design from the ground up with new style components, which will be supportable for a long time to come. Some of the much needed improvements include one set of common "D" size batteries accessible from the outside per Ludlum tradition, backlit LCD, separate kR indicator, and elimination of the mechanical switching mechanism.

Model 25 Series Personal Radiation Monitors

The Model 25 series represents a class of affordable "personal" radiation monitors. These little devices measure dose rate, accumulated dose, and tracks the time until reaching a specified dose. A flashing red light and loud audible signal are activated anytime an alarm setpoint is exceeded. In addition to its affordability, its also designed to be super simple to use with its two-button interface and large 1.3 cm (0.5 in.) characters on the display making it easy to read. The display automatically becomes backlit anytime the ambient environment is dark and an alarm condition is posted.

Model 3030P Alpha/Beta Sample Counter

The 3030P is a fully integrated, networkable alpha and beta sample counter. This design employs a PIPS™ solid state type of detector which provides excellent energy resolution, enabling independent and concurrent alpha and beta measurements for counting air samples, smears, and swipes. This system is a continuation of the successful 3030 series with many useful features like internal data logging, USB port, and battery operability.

New.... Ludlum also manufactures and sells its own planchets! These planchets are available in either aluminum or stainless steel and offered at the lowest prices in the industry for convenient one-stop shopping. (500 piece minimum quantity purchase)

Model 9-3 Ion Chamber

This air ionization chamber measures beta-gamma dose rate from 0–50 R/hr. The design incorporates a sliding shield to facilitate beta measurement. Unlike many in this class, the 9-3 produces an audio output of the dose rate to better facilitate surveying. This instrument is housed in Ludlum's traditional rugged housing with a rolled steel handle, tempered glass analog meter cover, and separate battery compartment.

Model 215 Alpha Frisker Station

Here is innovation at its best. An alpha frisking detector that requires no counting gas, no battery power and no messy cables. This system was designed as a glove box frisker station with a large 110 cm² sized detector cradled in a charging stand. In this configuration, the design permits operators to conveniently monitor for contamination on their hands by simply placing their hands against this system. If needed, the detector can also be removed from the stand and be used as an independant frisker detector for up to 30 minutes. Colored lights along the top of the detector, together with built-in audio output, make the detector operate equally well either in the stand or alone.