Dosimeters measure radiation exposure and warn the person if the dosage exceeds safe levels. These devices are worn by radiation emergency and traditional radiation workers to ensure their safety at the job site. Prolonged exposure to gamma rays, beta, alpha, and X-rays causes ionization radiation. With its energy, the radiation removes electrons from otherwise stable molecules. This is deadly when it happens to a living tissue, which is why anyone working in places with radioactive sites should have a dosimeter.
A dosimeter measures the radioactivity in an area. This is the amount of ionizing gamma, beta, alpha, and neutron radiation expressed as becquerel (Bq) and the curie (Ci). It also measures the absorbed exposure, represented as roentgen (R) and coulomb/kilogram (C/kg). Others can also give you radiation absorbed in rad and gray (Gy). These parameters provide a dose equivalent expressed as roentgen equivalent man (rem) and sievert (Sv).
An average person is limited to 0.1 rem/100 mrem per year. Mrem is a short form of millirem, which is the biological dose equivalent. In layman’s language, 1 R (exposure) equals 1 rad (absorbed radiation.
Dosimeters are standard devices in nuclear power plants, radiology, oncology, nuclear medicine, construction, maritime, and public safety. Due to different applications, dosimeters also come in different types. Read on as we review the best dosimeter you should consider for radiation dosage measurement.
| Products | Preview | Measurement Range | Accuracy | Price |
|---|---|---|---|---|
| 1. GQ GMC-600+ [Best Overall] |   | 0 - 4250uSv/h | Not specified | Check here! |
| 2. SOEKS |   | up to 1000 Sieverts (100,000 Roentgens) | Not specified | Check here! |
| 3. GQ GMC-300S |   | 0.00 - 1000.00 µSv/h | Not specified | Check here! |
| 4. RADTriage50 |   | Not specified | Not specified | Check here! |
| 5. Terra-P |   | 0.00 - 9 999 mSv | ±25% | Check here! |
| 6. NukAlertTM |   | Not specified | +/- 1 chirp | Check here! |
| 7. RADEX RD1503+ |   | 0.05 to 9.99 μSv/h | ±(15+6/P) µSv/h (%) | Check here! |
| 8. GQ GMC-500+ |   | 0 - 42500uSv/h | Not specified | Check here! |
| 9. RADEX One (White) |   | 0.05 - 999.0 mSv/h | ±15% | Check here! |
| 10. Radex One (Yellow) |   | 0.05 - 999.0 mSv/h | ±15% | Check here! |
| 11. Radex SCINTILLATOR |   | 0.05 - 999.0 mSv/h | ±15% | Check here! |
Top 11 Best Dosimeters in 2023
1. GQ GMC-600 Plus Dosimeter [Best Overall]
GQ GMC-600 Plus Dosimeter can detect gamma, alpha, better, and R-ray radiations. It displays the results on its LCD screen. And with three different display modes, you can get the best view. Additionally, the device gives you a graph of the detected radiation records for the last minute.
GQ GMC-600 Plus Dosimeter is a technologically advanced dosimeter. It allows you to record and analyze radiation data later. It also features an open protocol, making integrating into different systems easy. GQ GMC-600 Plus Dosimeter is the best option for workers in construction sites, hospital radiation labs, and other places with radiation traces.
Specification:
- Radiation Detection: Alpha, Beta, Gamma, and X-Ray.
- Detection Dose Range: 0 – 4250uSv/h
- Detection CPM Range: >1,000,000 CPM
- Working power: 0.045W – 0.2W
- Minimum Detectable Energy Range: Beta, Gamma, X-Ray: 0.1 MeV, Alpha: 2.0 MeV
- Own Background: 0.2 Pulses/s
Pros:
- Different display modes and large fonts
- Real-time graphic mode
- Timed count with scheduler
- Speaker and alarm to warn of the excess radiation dosage
- CPM to uSv/h and mR/h conversion
- Built-in memory for data storage
- Variable serial communication baud rate
Cons:
- Relatively expensive
2. SOEKS Quantum Professional Dosimeter
This product has dual Geiger-Muller tubes and an upgraded processor to synthesize data. Due to the upgrades, this dosimeter gives precise readings for 700 hours non-stop before recharging. As a dosimeter, SOEKS measures exposure to X-ray, beta, and gamma generated by different bodies and surfaces.
SOEKS has three modes: background, cumulative, and history data. Each one brings unique features and capabilities. This device has audible alarms and colored alerts just in case you work in a noisy environment. It is one of the best since it allows you to personalize and store data. You can connect it to the PC to transfer and analyze the radiation information.
Choose the SOEKS dosimeter if you work in hazardous environments with possible radiation contamination to stay safe. It is used by professionals in various sectors, including construction and medicine.
Specifications
- Time of cumulative storage: up to 999 days
- Range of dose measurements: up to 1000 Sieverts (100,000 Roentgens)
- Range of measurement: 1-1000 mR/h
- Sensitivity: 0.1 MeV for gamma and X-rays
Pros:
- Accurate radiation detection and dosage measurements
- Audible alarm and colored light warnings
- Easy to use – intuitive user interface
- Free PC software for further data analysis
- Long battery life – up to 700 hours of operation on a single charge
- High-capacity quantum’s 3-year memory for data storage
- High processing speed
Cons:
- Very expensive
3. GQ GMC-300S Digital Dosimeter
GQ GMC-300S is a digital dosimeter with a high-contrast LCD screen and LED indicator if the radiation dosage exceeds the limit. You will find its internal memory very useful in data logging. And in case you want to use your PC to view the data, GQ GMC-300S has a port for connection and free data viewer PC software.
GQ GMC-300S is a versatile tool with various applications, including the following:
- Seafood Radiation Detection
- Fruit Radiation Detection
- I-131 Radiation Treatment Monitoring
- Animal Cancer Radiation Treatment Monitoring
- Nuclear Power Plant Leaking Testing
- Nuclear Disaster Radiation Level Monitoring
- Mineral Radiation Detection
Specifications:
- Range of dose rate in µSv/h: 0.00 to 1000.00
- Range of dose rate in mR/h: 0.00 to 100.00
- Radiation detection: Beta, Gamma, and X-Ray
- Maximum Dose Reading: 99,999,999.99 µSv OR 9,999,999.99 mR
Pros:
- Very affordable
- Easy to use
- Data logging and free data viewing PC software
- Up to three operation modes: dosimeter, CPM count, and graph.
- Built-in audio and visual signals
Cons:
- No IP rating – better keep it dry
- Not as accurate as high-end dosimeters
4. RADTriage50 Dosimeter
RADTriage50 Dosimeter develops color, which intensifies with an increasing amount of exposure. The visual alert sets in when you are exposed to medically significant radiation doses of about 50-10,000 mSv. The color change is irreversible, allowing you to estimate the dosage using the reference bars.
RADTriage50 Dosimeter is ideal for individuals living near nuclear power plants, airline crew and personnel, and those exposed to frequent medical imaging. It is valid for two years from the issue date, and you don’t need a battery to power it. Just fit it in your cardholder, and you are good to go.
Pros:
- Highly portable
- Easy to use
- No battery is required for its operation
- Very affordable
Cons:
- Not accurate
- Unusable after two years
5. MKS-05 Terra-P Dosimeter
MKS-05 Terra-P dosimeter is ideal for measuring the following:
- Gamma and X-ray radiation ambient dose equivalent rate (DER)
- Gamma and X-ray radiation ambient dose equivalent (DE)
- Contamination by beta radionuclides
This device features three independent channels for radiation measurements and automatically sets measurement intervals and ranges. You can program the audio alarm threshold for the gamma radiation dose rate.
Specification:
- Gamma and X-ray radiation ambient dose equivalent: 0.00 – 9 999 mSv; ±25%
- Gamma and X-ray radiation: 0.05 – 3.0 MeV; ±25%
- Beta radiation: 0.5 – 3.0 MeV
- Measurement time intervals: 5 – 70 seconds
- Battery life: 6 hours
Pros:
- Shock resistant
- Built-in better and gamma-sensitive GM counter
- Audio signaling for every registered gamma-quantum and beta-particle
- Battery level indicator
- Programmable audio alarm threshold level of gamma radiation dose rate
- Automating settings for measurement interval and ranges
Cons:
- Not dust and waterproof
6. NukAlertTM Nuclear Radiation Detector
NukAlertTM is used by federal, state, first-person respondents, law enforcement, and the department of defense. It is also becoming increasingly popular among security personnel. This device gives you the confidence you need when working in places suspected of radioactive elements.
The NukAlertTM dosimeter is easy to carry around. It is keychain-attachable, which enhances its portability. It accurately monitors radiation exposure and sounds a loud alarm to alert you of the danger.
Specifications:
- Detection Range: 100 mR/h to 5,000 R/h
- Metering: 100 mR/h to 50 R/h, in 10 calibrated ranges
- Proportional Increasing Chirp Rate: 50 R/h to 5,000 R/h
- Gamma and X-rays from 20 keV to above 2 MeV
- Alarm loudness: ~ 61 dBA (speaking volume)
- Accuracy: Within +/- 1 chirp
- Temperature Range: -20C to +50C
- Response Time: Dose rate dependent: ~3 – 4 min. @100mr/h and seconds @ R/h ranges
Pros:
- Keychain attachable – easy to carry around
- Long battery life
- Durable – functions after 6 feet drop
- Audible alarm
- Ergonomic design
Cons:
- No data logging
- It cannot be interfaced with other systems
7. RADEX RD1503+ Outdoor Edition dosimeter
RADEX RD1503+ uses signal-processing algorithms to enhance the precision of radiation level measurement. It also has a strong build quality and sturdy casing, ensuring the reliability of the dosimeter.
You don’t have to keep your eye on the screen of RADEX RD1503+. The device has an audio and vibratory alarm to warn you if it detects excess radiation levels.
Specifications:
- Fast measurement cycle: 40 sec for standardized measurement with 10-sec initial result
- Measuring range: 0.05 to 9.99 μSv / h
- Sensitivity to gamma radiation: 0.1 – 1.25 MeV
- Sensitivity to beta radiation: 0.25 – 3.5 MeV
- X-ray sensitivity: 0.03 – 3.0 MeV
- Value range of the ion dose rate: 5 to 999 μRem / h
- Alarm levels: 0.10 – 0.90 μSv / h or 10 – 90 μRem / h
- Calculation time: 40 +/- 0.5 sec.
- Operating time: 500+ hours
- Scale range of Gamma-radiation energy: 0.1 – 1.25 MeV
- Error – of dose rate: ±(15+6/P) µSv/h (%)
Pros:
- Adjustable audio/vibration alarm
- Lightweight, reliable, and durable
- High-quality backlit display unit
- Easy to use for radiation measurement
- Displays the difference between background radioactivity and effective dose
Cons:
- Not waterproof
8. GQ GMC-500Plus Nuclear Radiation Monitor Dosimeter
Interestingly, the GQ GMC-500Plus features a built-in flash memory to store personal information and radiation data. Additionally, you can log the data to the cloud or submit them to any server of choice.
This dosimeter also displays real-time graphic data, but you can switch to text mode. It is an excellent radiation monitoring tool or a personal dosimeter for tracking radiation exposure.
GQ GMC-500Plus is ideal for testing building materials, hospital radiation therapy, water, food, etc., and you can use it indoors and outdoors. If you prefer this choice, consider buying the case here.
Specifications:
- Detection Dose Range: 0 – 42500uSv/h
- Detection CPM Range: 0 – 982980 CPM
- Detectable Energy Range: 0.1 – 3.0 MeV
- Own Background: 0,2 Pulses/s
- Working Voltage: 3.2-4.0V
- Working power: 0.045W – 0.2W
- Power: 3.6V/3.7V battery / USB power
Pros:
- Wide detection range
- Intuitive user interface features
- Large information dot matrix LCD screen
- Versatile data acquisition
- Open protocol – easy integration into other systems
- Free PC GMC data viewer software
- Detects gamma, betta, and X-ray radiations
Cons:
- Relatively expensive
9. RADEX ONE Personal Dosimeter
This device gives you an immediate result for accumulated dose within seconds, thanks to its sensitive, full-size GM tube.
You can forget about recalibration for about a decade. Besides, it comes pre-calibrated and certified for use in different environments.
RADEX ONE is one of the best choices if you want a dosimeter to interface with your PC. It has a USB port for data transfer to a computer for better viewing and analysis.
Specifications:
- Detection range: 0.05 – 999.0 mSv/h
- Measurement cycle: 10 seconds
- Accuracy: ±15%
- Gamma radiation energy range of 0.1 to 1.25 MeV
- X-ray range of 0.03 to 3.00 MeV
- Beta radiation range of 0.25 to 3.50 MeV
Pros:
- Very fast – provides data within 10 seconds
- High accuracy and sensitivity
- No additional calibration is required
- Compact and portable
- Easy to use
- Free PC data recording and charting software
Cons:
- The display screen could have been larger
- Overly simplistic design
10. RADEX ONE Personal RAD Dosimeter
RADEX ONE Personal RAD Dosimeter can detect gamma, beta, and X-ray radiations and measure the cumulative doses. It will show you how much ionizing radiation was detected over a specified period. Thanks to its sensitive GM tube with a detection range of 0.05 – 999.0 mcSv/h.
You can also connect this to your personal computer for data logging and viewing. Additionally, you get free PC software for data logging and viewing.
Specifications:
- Detection range: 0.05 – 999.0 mSv/h
- Measurement cycle: 10 seconds
- Accuracy: ±15%
- Gamma radiation energy range of 0.1 to 1.25 MeV
- X-ray range of 0.03 to 3.00 MeV
- Beta radiation range of 0.25 to 3.50 MeV
Pros:
- Very fast – provides data within 10 seconds
- High accuracy and sensitivity
- No additional calibration is required
- Compact and portable
- Suitable for outdoor use
- Free PC data recording and charting software
Cons:
- The display screen could have been larger
11. RADEX Scintillation Lab-Grade Radiation Detector
RADEX offers non-professional consumers fast and accurate radiation measurements. It works quickly and with unmatched precision to detect gamma and beta particles. You can use it to localize high-level radioactive sources in the environment.
Specifications:
- β (Beta), γ (Gamma), and X-ray radiation detection.
- 10 seconds measurement cycle.
- Detection range: 0.05 – 999.0 µSv/h.
- ±15% accuracy.
- 999.0 µSv/h upper threshold.
Pros:
- Data transfer to PC
- Audible/vibration alarm
- Compact and lightweight
- Large color LCD screen
- One-yearar warranty
Cons:
- Fragile built quality
Best Dosimeter Buying Guide
What should you consider when looking for a new dosimeter to buy? Different dosimeter types exist in the market for varying purposes. But with this guide, you can make the best decision. Consider the following factors:
1. Application
This is the most significant factor to consider in the market for a new dosimeter. Some devices are best for nuclear plants, medical procedures, and industrial applications. These are more sophisticated and expensive. If you are looking for a personal dosimeter, you can choose other, more affordable options.
2. Radiation Type
You can buy a dosimeter to measure the type of radiation you anticipate in your surroundings. Most dosimeters can measure beta, gamma, and X-rays, but you need a specialized device to detect neutron radiation. Also, note that the radiation depends on the industry. For example, medical doctors need a dosimeter that accurately measures X-ray radiation.
3. Features and Functions
What information do you want your dosimeter to provide for you? Dosimeters, as the name suggests, show cumulative radiation dose. But some can also provide an increase in radiation levels to warn you of the increased danger in your environment. Also, some have both visual and audio alarms. These are ideal even in noisy environments.
4. Usage
How do you plan to use your dosimeter? Do you want to wear it on the coat, finger, toe, or head? Dosimeter manufacturers specify where you should put it for accurate radiation detection and measurement. Choose a device that suits how you want to use it.
5. Radiation Measurement Range
Choose a dosimeter that corresponds to expected radiation levels. Choose one with a higher radiation measuring range if you want to use it in a nuclear plant or other areas with high radiation contamination. On the other hand, choose one with a lower range if you intend to use it in a cold zone. That ensures the measured values are always accurate.
FAQ
Q: What is the difference between dosimeter and Geiger counter?
A: Geiger counter and dosimeter are different. The Geiger counter measures the amount of particles hitting the Geiger tube and the reading is displayed in time interval. On the other hand, the dosimeter measures the cumulative exposure. For further explanation, you can read here.
Q: What is the best Geiger counter?
A: Check our reviews of Geiger counter here.
Q: What is types of dosimeter?
A: These are the types of dosimeter taken from ORAU: Film badges, Optically stimulated luminescence dosimeters, Thermos-luminescent dosimeters, and Direct-ion storage dosimeters.
Q: My dosimeter looks like a Geiger counter. What is it actually?
A: It seems that your dosimeter is made from Geiger counter sensor, and the microcontroller process the data and convert the counts per second (cps) reading into dose rate (Gy/h, Sv/h, etc.).
Best Dosimeters: Recommendations
Dosimeters are vital devices for workers and individuals who go to radiation-contaminated areas. They alert you when the cumulative ionizing radiation dose is approaching the allowable limit.
If you are looking for a dosimeter, you can buy the GQ GMC-600 Plus Dosimeter. We recommend this for its reliability, functions, and features it offers. It is ideal for professional use or as a personal dosimeter.
You can also buy SOEKS Quantum Professional Dosimeter as an alternative if you have the budget. It is accurate, precise, and feature-packed, though you have to pay more.
The last option we recommend is for you if you are on a tight budget. GQ GMC-300S Digital Dosimeter is a cost-effective option with stunning features and functions, including data logging and different operation modes.
You can also use our buying guide to choose the best dosimeter. It can be from the list of the best dosimeters reviewed or any preferred product.
