Photodiodes for Radon Detection

The Excelitas VTH21 and VTH30 photodiodes are offered in chip form for optimal alpha particle detection such as radon gas detection applications. Featuring a robust chip design, these low capacitance silicon photodiodes provide high responsivity to radiation of interest. These photodiodes are available in both a 5x5mm and 10x10 mm large active area for maximum detection of low level radiation and a spectral response between 400 nm and 1100 nm.

Additional Resources

Why should you choose Excelitas as your provider of Photodiodes for Radon Detection?

Excelitas is fully committed to enabling the success of our global customers by delivering innovative, high-performance, market-driven photonics solutions. For decades, we have remained committed to living out our mission as a leading manufacturer of photonics solutions to serve our customers worldwide.

As part of this commitment, Excelitas proudly offers the VTH21 Series of photodiodes in chip form designed to enable the optimal detection of alpha particles like radon gas. This series features low-capacitance silicon photodiodes in a robust chip design to provide high responsivity to radioactive particles. These enhanced detection capabilities enable the fast detection of radiation of interest, producing safer controlled environments in their respective applications.

What are the different uses of Photodiodes for Radon Detection?

Photodiodes are semiconductor devices capable of detecting light and converting it into electrical signals for a wide range of applications. This is done by absorbing photons of light and generating electron-hole pairs in the semiconductor in order to produce a current when separated by an electric field.

The photonic detection capabilities of photodiodes can be applied in systems that require the detection of light signals and radiation, particularly in detecting the presence of radon in the following ways:

Alpha Particle Detectors: Equipment that detect the presence of alpha particles during the decay of radon gas
Scintillation Detectors: Devices that detect the presence of radon gas through the light emitted when a scintillator interacts with radon gas alpha particles

What types of Photodiodes for Radon Detection do you offer?

Excelitas offers a series of low-capacitance silicon photodiodes in the form of the VTH21 family of photodiodes designed for enhanced radon detection capabilities in various applications. These include the VTH2110 and the VTH2120, with both being available in chip form and having a spectral response between 400 nm and 1100 nm.

They also have similar functionalities and specifications as they are both:

Optimized for alpha particle detection
Supplied in chip form
Low capacitance
Low dark current
Radiation resistant
RoHS compliant

The main difference between the two chips is their main activation area, with the VTH2110 and the VTH2120 having activation areas of 5 x 5 mm² (25 mm²) and 10 x 10 mm² (100 mm²), respectively.

What are the applications of Photodiodes for Radon Detection?

Radon is a naturally occurring radioactive gas that is useful in many applications, such as radiation therapy, geological surveys and research, among many others. Because of its ubiquity in various industries, radon testing has become absolutely essential to prevent exposure to radioactive elements.

With this in mind, photodiodes can be quite helpful in the following applications:

Nuclear power plants
Laboratories
Research
Healthcare
Environmental monitoring
Geological surveys
Construction
Mining
Home Use

Do you offer custom Photodiodes for Radon Detection?

Excelitas Technologies has been a global leader in delivering innovative technological solutions that help our OEM customers and other industrial partners in achieving their business goals. As part of our commitment to quality and performance, we continue to implement the strictest standards in all the products we manufacture, including photodiodes used in various radon detection applications.

While our off-the-shelf products were manufactured with efficiency and performance in mind, we also cater to customers with more specialized requirements. If you have custom specifications in mind for photodiode solutions, communicate them to us so we can accommodate your orders. Rest assured that your custom orders will follow the same strict quality standards we apply to our industry-leading products.

Product List

Part Number

VTH3020

VTH3020 Large-area Silicon Photodiode, Chip-on-Board Detector

The Excelitas VTH3020 is an advanced Chip-on-Board (CoB) large-area 100 mm2 Silicon Photodiode that delivers exceptional performance. This state-of-the-art photodiode is optimized for alpha particle detection, making it an ideal choice for applications such as radon gas monitoring. Its chip-on-board design simplifies the reflow assembly process. Furthermore, its innovative design significantly enhances responsivity to alpha particles, effectively eliminating the absorption issues commonly associated with window assemblies. Additionally, its large area maximizes the collection efficiency for low-level radiation, ensuring precise and accurate detection.

Part Number

VTH2110

VTH2110 Silicon Photodiode, Chip Form

The VTH2110 is a 25 mm2 silicon photodiode offered in chip form for optimal alpha particle detection, such as radon gas detection applications. This photodiode provides an enhanced response to radiation of interest, with a radiation robust chip design and a large active area of 5x5 mm. This low capacitance silicon photodiode provides a 25 mm2 active area and spectral response between 400 nm and 1100 nm.

Part Number

VTH2120

VTH2120 Silicon Photodiode, Chip Form

The VTH2120 silicon photodiode with a 100 mm2 active area is offered in chip form for optimal alpha particle detection, such as radon gas detection applications. This photodiode provides an enhanced response to radiation of interest, with a radiation robust chip design and a large active area of 10x10mm.