A single photon counting module can combine a photosensor and signal-processing electronics, but the products listed here include both standalone SiPM sensors and supporting development hardware. The AFBR-S4E001 evaluation kit is best for exploring a compatible SiPM platform, while the pulse-output board is the closest listed option to an integrated photon-counting device. The onsemi parts are sensors for designs that provide their own readout; the CR-110-R2.2 is a charge-sensitive preamplifier, not a photon detector.
| Product | Best suited for | What it is |
|---|---|---|
| Pulse Output Photon Counting 60035SIPM | Buyers seeking a pulse-output board | SiPM photon-counting board |
| AFBR-S4E001 EvalKit | Evaluation and development | Optical sensor development kit |
| onsemi MICROFC-60035-SMT-TR1 | Custom detector designs | SiPM sensor |
| onsemi MICROFC-60035-SMT-TR | Custom detector designs | SiPM sensor |
| CR-110-R2.2 CSP Module | Signal-conditioning designs | Charge-sensitive preamplifier |
Pulse Output Photon Counting 60035SIPM

This is the closest match in the list to a single photon counting module because its supplied description identifies it as a pulse-output photon-counting board using a 60035SIPM silicon photomultiplier. A pulse-output format can suit projects that need a detector signal presented as pulses for downstream counting electronics.
- Best for: Buyers looking for a board-level photon-counting option rather than only a bare SiPM sensor.
- Why it was selected: Its name and listed feature explicitly describe a pulse-output photon-counting board.
- Limitation: The supplied product details do not specify output levels, connector type, operating voltage, or interface requirements. Confirm these before designing around it.
AFBR-S4E001 SiPM Evaluation Kit

The AFBR-S4E001 is identified as an optical sensor development tool and evaluation kit for AFBR-S4NxxC01x SiPM devices. It is therefore a development-oriented choice, not a general-purpose module whose compatibility with unrelated sensors can be assumed.
- Best for: Engineers and researchers evaluating the specified AFBR-S4NxxC01x SiPM family.
- Why it was selected: Evaluation hardware can help buyers investigate a sensor platform before planning a larger detector design.
- Limitation: The supplied listing does not detail included accessories, software, or supported measurement functions. Check the kit documentation and sensor-family match before purchase.
onsemi MICROFC-60035-SMT-TR1 SiPM

This onsemi C-Series component is listed as a silicon photomultiplier sensor with a 6 mm size and 35 µm microcell pitch. It is a detector component, not a complete counting module with a specified readout board.
- Best for: Buyers building a custom detector and selecting a SiPM sensor as one part of the design.
- Why it was selected: The listing provides sensor-series, size, and microcell-pitch information that can help distinguish it from complete boards.
- Limitation: The listed details do not describe biasing, signal conditioning, or a counting interface. Those requirements must be addressed separately.
onsemi MICROFC-60035-SMT-TR SiPM

This listing also identifies an onsemi C-Series SiPM sensor with a 6 mm size and 35 µm pitch. Its stated core specifications resemble the MICROFC-60035-SMT-TR1 listing, so buyers should compare the exact part number and manufacturer documentation rather than assume the suffixes are interchangeable.
- Best for: Developers who need the listed 6 mm, 35 µm-pitch sensor for a custom design.
- Why it was selected: It is a direct SiPM component option for projects where the buyer supplies the supporting electronics.
- Limitation: This is not described as a standalone photon-counting module; the listing does not provide complete system-level specifications.
CR-110-R2.2 Charge-Sensitive Preamplifier

The CR-110-R2.2 is a charge-sensitive preamplifier module, so it belongs in the signal-conditioning category rather than the photosensor category. Its listed gain is 1.4 volts per picocoulomb. The stated equivalent noise charge is 200 electrons RMS with the input unconnected and a 1 µs shaping time.
- Best for: Buyers whose detector design needs a charge-sensitive preamplifier and whose signal requirements match the published specifications.
- Why it was selected: It is a relevant supporting component for detector electronics and includes specific gain and noise information.
- Limitation: It is not a SiPM or a complete photon-counting system. Review the manufacturer’s full specifications before determining whether it suits a particular sensor.
Buying Guide: How To Choose A Photon-Counting Device
Do you need a complete module or a sensor component?
Start by deciding whether you want a board that presents a countable pulse or a sensor to integrate into custom electronics. The pulse-output board is the most directly described board-level option here. The two onsemi products are SiPM sensors, so their listings alone do not establish that they include readout or counting electronics.
Which sensor or platform must it support?
Check the exact sensor family and part number. The AFBR-S4E001 kit is described for AFBR-S4NxxC01x SiPMs, while the onsemi listings identify MICROFC-60035-SMT variants. Do not assume that an evaluation kit or board supports a different family without documentation.
What electrical details should you verify?
Before selecting a component, confirm operating and bias requirements, output format, connector, signal levels, and any required amplification or counting hardware. The provided listings do not supply all of these details. For the CR-110-R2.2, compare the stated gain and noise conditions with the needs of the full detector circuit.
How should you compare similar part numbers?
For the two MICROFC-60035-SMT listings, compare the complete part numbers and manufacturer specifications. The product names share size and pitch details, but the available information does not explain the distinction between the TR and TR1 suffixes.
Frequently Asked Questions
What is a single photon counting module?
It is a detector system designed to register individual photon events, typically using a photosensor and electronics that produce or count corresponding signals. Product descriptions should be checked to see whether they cover the sensor alone or a complete signal chain.
Is an SiPM sensor a complete photon-counting module?
Not necessarily. An SiPM is a photosensor component. A complete module may also require biasing, signal conditioning, and pulse-counting electronics.
Which listed product is closest to a photon-counting board?
The Pulse Output Photon Counting 60035SIPM listing is the closest match because it describes a pulse-output photon-counting board.
Can the CR-110-R2.2 detect photons by itself?
No. It is described as a charge-sensitive preamplifier, not a photosensor. It may serve as a supporting electronics component in a suitable detector design.
Does the AFBR-S4E001 kit support every SiPM?
The supplied description names AFBR-S4NxxC01x devices. Confirm compatibility with the exact sensor you plan to use.