Radiation Dosimeters & Readers

Dosimeters are an important, reliable tool for the periodic staff monitoring of employees working around radiation. We manufacture a variety of occupational dosimeters using OSL, TLD, and CR-39 technologies. While over 80% of U.S. hospitals have chosen LANDAUER dosimeters to monitor radiation exposure of their staff, our dosimeters and readers aren't just limited to healthcare; they are used by workers in dental, veterinarian, chiropractic, military, industrial, and nuclear settings, too.

Dosimeter Types

Our comprehensive range of dosimeters include whole body, extremity, lens-of-eye, as well as area monitors that you can choose from.

Whole body dosimeters are usually worn on the chest but are also suitable for wrist and ankle monitoring

Extremity dosimeters are flexible, comfortable rings worn on the finger

Lens-of-eye dosimeters are usually worn on eyeglasses, safety glasses, a cap, or a visor

Area dosimeters monitor the radiation levels in a specific area or environment

LANDAUER Dosimeters

Dosimeter Family	Advantages	Re-Readable	Lower Limit of Detection	Maximum Wear Period	Placement	Reading Options
Luxel+ OSL (Pa, Ja, Ta)	Lightweight, versatile, flat, built-in clip, can be used as whole body, extremity, or area dosimeter. Minimum reportable dose: 1 mrem	Yes	1 mrem	12 months	Whole body Extremity Area monitoring	Subscription only
Escort OSL	Laminated, wallet-sized, whole body dosimeter ideal for first responders working accident sites. Minimum reportable dose: 1 mrem	Yes	1 mrem	12-24 months	Whole body	Subscription
Saturn Ring TLD	Comfortable, flexible, easy to disinfect and clean, designed specifically to measure hand dose. Available in 3 sizes. Minimum reportable dose: 10 mrem
Neutrak CR-39	Detects neutron radiation, available in multiple configurations (Fast-Only or Fast+Thermal) and forms (pouch form or combined with Luxel+/InLight), ideal in industrial settings with InLight or in hospital settings with Luxel+.
InLight OSL	Robust, durable, ideal in industrial settings and environments with more extreme heat/cold. Intended for use with OSLR readers. Minimum reportable dose: 5 mrem
Vision TLD	Easy clip-on attachment for glasses, caps, or visors, specifically designed to measure lens dose. Minimum reportable dose: 10 mrem
RadWatch OSL	Durable, worn on wrist (no clip needed), ideal for military use and emergency responders handling unknown hazards, reusable with compatible reader. Minimum reportable dose: 5 mrem

Dosimetry Service

Our dosimeter subscription service ensures accurate and reliable staff monitoring and precise dose measurements in any environment where there is potential exposure to ionizing radiations.

Our service includes:

Regular dosimeter exchanges
Analysis in our NVLAP accredited lab (NVLAP LAB CODE 100518-0)
Standard dosimetry reports
myLDR account portal
- Manage dosimeters and participants
- Access, share, and store dosimetry reports
- Unused and unreturned dosimeter report
- Manage multiple locations and departments in one account
- Track shipments
- View and pay invoices
- Individual Dose Review (IDR) for participants
- Optional modules for improved workflows

Dosimeter Readers

For clients with an in-house dosimetry program, we also manufacture several readers for use with select LANDAUER dosimeters.

Reader	Typical Use	Key Features	Works with
OSLR Reader Series	In-house radiation management program	Simple calibration, remote maintenance, available in three capacities	InLight dosimeters
RadLight^®	Military and outdoor/extreme conditions	Portable and rugged, suitable for outdoor use, 21 hour battery life	RadWatch

Who Uses Dosimeters?

LANDAUER dosimeters are used in:

Certain dosimeters are ideal for different settings or situations. For example, LANDAUER Escort is made for emergency and first responders while InLight is recommended for industrial settings such as power plants and national laboratories. Luxel+ is one of the most versatile dosimeters that can be used for whole-body monitoring in most settings. RadWatch is intended for military use, specifically for whole-body dosimetry involved with nuclear detonations, but is also used for civilian emergency responses such as after natural disasters.

The Saturn Ring and Vision dosimeters are designed to specifically measure hand and lens-of-eye doses. Because of that, the Saturn Ring is useful in nuclear medicine, radiation oncology, or source production. As for Vision, it works well in scenarios in which radiation sources are directed toward the face or head such as for employees working with fluoroscopy machines in interventional radiology or cardiac catheterization laboratories.

Dosimeter Usage Guidelines

Properly wearing and caring for LANDAUER dosimeters is crucial to monitor radiation exposure accurately. From the moment dosimeters arrive at the workplace, there are important guidelines to follow when it comes to handling, wearing, and storing dosimeters.

Dosimeters such as Luxel+ will arrive in a package containing two bags: a bag with all the dosimeters and another bag with all the badge holders. Before wearing dosimeters, you need to remove the clear plastic tab at the top of the Luxel+ dosimeter, so the dosimeter can be read properly. Then, place the dosimeter within the gray holder. It is then ready to be worn.

Preparing Luxel dosimeters for use

There are a few different ways to correctly wear a dosimeter in the workplace. The most common location dosimeters are worn is on each person’s chest, however, placements can vary depending on work environments, shielding, and what the dosimeter is measuring (i.e. a fetal dosimeter will operate as an additional dosimeter and be worn across the individual’s waist).

Dosimeters should be safely stored in an area away from radiation when not in use. This can be done using badge boards or another central area for employees to return their dosimeters after completing work for the day. Following these guidelines ensures radiation exposure levels will be accurately read.

Dosimeter on chest

Control Dosimeter

A control dosimeter will come with every LANDAUER dosimeter shipment. The purpose of this dosimeter is to monitor potential radiation from the moment it is shipped to the moment it returns back to the lab to be analyzed.

Dosimeter Return and Replacement

Dosimeters are worn by workers for a predetermined amount of time (often ranging from a month to as long as a year). Two weeks before the wear period ends, LANDAUER will send new dosimeters to your workplace. The most recently worn dosimeters can then be shipped back to LANDAUER to be read, analyzed, and the subsequent data compiled into a report. Badges should be removed from the holder before being put into the return package. The gray shipping bag that dosimeters are shipped in operates as a 2-way mailer and can be used to return the badges.

Dosimeter Reporting and Records

From there, the LANDAUER team will put together an in-depth dosimetry report which will include four sections that will list the deep dose equivalent, lens dose equivalent, and shallow dose equivalent data. Those four sections are:

Wear period
Quarter-to-date dose
Year-to-date dose
Lifetime-to-date dose

You can review a sample report here

If you have subscribed to additional reports, they will be created and available in myLDR. Below is our full list of optional reports.

Trust Dosimeter Provider

With 70 years of experience in the field, LANDAUER has built a reputation for delivering high-quality, reliable, and accurate dosimeters capable of detecting minimal exposure levels. We are dedicated to supporting occupational safety by offering a diverse range of products using advanced OSL, TLD, and CR-39 technologies, and trusted by professionals across various industries.

LANDAUER Radiation Dosimeters & Readers