FNIRSI P4100 probe

The FNIRSI P4100 is a professional oscilloscope probe designed for precise signal analysis in service, laboratory and electronic applications. It offers a bandwidth of 100 MHz and an attenuation ratio of 100:1, making it ideal for measuring signals with various voltage levels. The maximum operating voltage of 1000 V DC + ACPP ensures a wide range of applications, including working with high-voltage circuits.

Accurate capture of fast signals

The short rise time of only 3.5 ns enables accurate reproduction of dynamic waveforms and detection of even very fast signal changes. As a result, the probe is ideal for any application where high measurement accuracy and reliable analysis of electrical parameters are essential. The 100 MHz bandwidth ensures accurate measurements over a wide frequency range, increasing the efficiency of diagnostics and testing.

Robust design for everyday use

The probe housing is made of durable ABS plastic, which ensures resistance to intensive use and performs well in both workshops and laboratories. Due to its durable construction and versatile operating parameters, the FNIRSI P4100 is a practical tool for electronics, repairmen and anyone who needs accurate, stable and safe measurements.

Included in the kit

• probe
• screwdriver
• multi-colored test leads (8 pieces)
• Tip positioning sleeves (2 pieces)
• spring
• user manual

Warranty: 24 months

The text is machine translated.

It is important to know

The FNIRSI P4100 probe is intended for anyone who frequently works with signal diagnostics and oscilloscopes in a home or hobby environment. It will be most appreciated by users who need ease of use and adequate quality for less demanding measurements. Before purchasing, it is recommended to consider whether the probe parameters are sufficient for your specific application and whether it is compatible with your oscilloscope.

• The probe is mainly suitable for basic and medium-demanding measurements — for high-frequency or professional laboratory needs, you may quickly encounter limitations.
• The connectors are mostly standard, but check that they match the connectors on your oscilloscope, as flexibility is not always a given.
• In long-term use, moderate robustness may mean that the probe is more susceptible to mechanical damage — more careful handling is recommended.

In practice

🔬 Home use / hobby electronics

🟢 A suitable choice for basic repairs, basic signal analysis and DIY projects.

👨‍🔧 Service and repairs

🟡 Sufficient for basic diagnostics, accuracy limitations may apply to more demanding industrial service.

📚 Study

🟢 A good solution for initial lab tasks and learning the basics of oscilloscopy.

Answers to frequently asked questions

Is the FNIRSI P4100 probe compatible with all types of oscilloscopes?

The probe is compatible with most standard models, but we recommend checking the connector type on your oscilloscope before purchasing.

What is the maximum recommended measurement frequency with this probe?

The FNIRSI P4100 probe is designed for basic and medium-demanding measurements, so it is not the best choice for high-frequency signals and precise analysis.

Can the probe be easily repaired or does it need to be replaced if damaged?

In the event of mechanical damage, repair is usually unprofitable, so replacement with a new probe is recommended.

What is the recommended use for school or student needs?

The FNIRSI P4100 probe is suitable for basic experiments and learning about the operation of oscilloscopes in schools and colleges.

Description updated: August 2026

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