NIRSBOX Optical Probes
At PIONIRS, we can provide all you need for quick and easy TD-NIRS measurements.
Our probes are fiber-based and are provided along with their specific IRFBOX, to enable fast and easy Instrument Response Function acquisition, for more accurate measurements.
A wide variety of probes are available, making measurements possible in every conditions.
M1 "Manta"
G5 "Goccia" optical probe
The G5 optode is water proof, flexible and durable. With adaptive geometry also for curved surfaces, and improved ambient light rejection, this probe features a built in contact sensor. Equipped with smart IRFBOX and holder. The recommended applications are in-vivo measurements (adults and babies), sport and exercise measurements, clinical studies and trials.
Source-detector separation: 25 mm
Dimensions: 55.0 mm (W) x 30.0 mm (L) x 8.5 mm (H)
Main body flexibility: Medium
Optical fibers: PIONIRS POF fibers (source and detection), FC/PC connectors
Standard cabling length: 1.5 m
Contact sensor: Yes
Typical measurement site: Muscles, forehead





H2 optical probe
The H2 optode features vertical illumination and retractable fiber tips. It has easy mount flexible adapter with adaptable interfiber distance. The probe is highly flexible with directable fiber cables. Ideal for in-vivo measurements on head, also in presence of hair, and functional-NIRS (fNIRS) measurements.
Source-detector separation: 20 mm to 30 mm
Dimensions: 60 mm (W) x 20 mm (L) x 15 mm (H)
Main body flexibility: High
Optical fibers: 2×1 PIONIRS fiber bundle (source), PIONIRS POF fiber (detection), FC/PC connectors
Standard cabling length: 1.5 m or 3.0 m
Contact sensor: No
Typical measurement site: Head, through hair, Fp1, … C1, C3, … , visual cortex, etc.




B5 optical probe
The B5 optode is our first choice for a plug-and-play solution, optimal for in-vivo measurements during extreme tasks. It is the most compact PIONIRS probe (less than 7 mm thickness). The recommended applications are: in-vivo measurements, sport and exercise measurements.
Source-detector separation: 30 mm
Dimensions: 37.7 mm (W) x 28.5 mm (L) x 6.5 mm (H)
Main body flexibility: Medium
Optical fibers: PIONIRS POF fibers (source and detection), FC/PC connectors
Standard cabling length: 1.5 m
Contact sensor: No
Typical measurement site: Muscles, forehead




P1 "Penna" optical probe
The P1 optode is a hand held vertical probe, with ergonomic handle, apt for single-shot measurements. The recommended applications are head measurements through hair and in-vivo veterinary medicine. The P1 optode has IP65 impermeability grade.
Source-detector separation: 25 mm
Dimensions: 43 mm (W) x 22 mm (L) x 120 mm (H)
Main body flexibility: N/A (rigid probe)
Optical fibers: 2×1 PIONIRS fiber bundle (source), PIONIRS POF fiber (detection), FC/PC connectors
Standard cabling length: 1.5 m or 3.0 m
Contact sensor: No
Typical measurement site: Head (through hair), veterinary applications.



S1 optical probe
The S1 optode is an easy-to-use fiber replaceable solution, optimal for measurement on semi-planar surfaces. Thanks to its compactness and high durability, it is optimal for optical tissue characterization, either on phantoms and ex-vivo. Available also for NIRSBOX-Q system.
Source-detector separation: 30 mm
Dimensions: 48 mm (W) x 20 mm (L) x 11.3 mm (H)
Main body flexibility: Low
Optical fibers: 2×1 or 4×1 PIONIRS fiber bundle (source), PIONIRS POF fiber (detection), FC/PC connectors
Standard cabling length: 1.5 m or 3.0 m
Contact sensor: No
Typical measurement site: Phantoms, ex-vivo tissue



M1 "Manta" optical probe
The M1 optode enables advanced, multi-site investigations. Suitable for assessing both cerebral and peripheral oxygenation, this probe allows for bilateral measurements or simultaneous monitoring at two distinct anatomical sites on the body. The optode is designed for the NIRSBOX DUAL system in combination with our Optical Switch.
Have a look at the tutorial for an easy configuration!
Source-detector separation: 25 mm
Dimensions: 20 mm (W) x 39 mm (L) x 4 mm (H)
Main body flexibility: Medium
Optical fibers: PIONIRS POF fibers (source and detection), FC/PC connectors
Standard cabling length: 1.5 m
Contact sensor: Yes
Typical measurement site: Bilateral measurements, both on brain and muscles




Didn't find what are you looking for?
Every research application comes with unique requirements.
PIONIRS offer custom-designed optical probes tailored to specific scientific goals, operational environment (eg. MRI-compatible materials), and measurement needs.
Whether you require vertical or horizontal probe configuration, and precisely configured source-detector separations to optimize spatial resolution and depth sensitivity, our team works closely with you to develop the ideal solution.
From single-channel setups to multi-distance monitoring configurations, we ensure your probe is engineered for accuracy, durability, and seamless integration with the NIRSBOX system.
Tell us about your application – we’ll build the probe to match.
Contact us to discuss your custom probe solution and request a consultation with our team.




Product intended to be used for research applications only, not sold as medical device. Product not intended to be used for diagnosis or disease treatments. Specifications and data are preliminary and may be subject to changes, to improve function, reliability or design.