Oscilloscope Probes

An oscilloscope is considered to be the most used instrument for electrical engineers who need to measure electrical characteristics of electronic devices but you also need at least one probe.
Things to consider when choosing probes
• Ensure the probe's input connector matches the connector on your scope
• Choose a probe whose input resistance and capacitance match the input resistance and capacitance of your scope - matching is critical for guaranteeing proper signal transfer and signal accuracy
The best approach, for matching a probe with a scope, is to first choose a probe whose capacitance is within the range of your scope and then fine-tune the probe's capacitance by adjusting its compensation network using the probe's trimmer capacitor.
The 1X probes are suitable for many low frequency applications. They typically offer the same input impedance of the oscilloscope which is normally 1 M Ohm. The most common type of probe with a built in attenuator gives an attenuation of ten, and it is known as a 10X oscilloscope probe
Types of probes
Passive probes are the most commonly used probes for taking measurements. They are easy to use, relatively inexpensive, and fairly rugged. Available in the following configurations:
• 1´: no attenuation
• 10´: factor-of-10 attenuation
• 100´: factor-of-100 attenuation
• 1000´: factor-of-1000 attenuation
Attenuation probes serve to multiply the voltage measurement range of the oscilloscope by using an internal resistor that, when used in conjunction with the input resistance of the scope, creates a voltage divider. Useful for the following reasons:
• It allows for the measurement of a signal that might exceed the limits of the oscilloscope.
• The attenuation circuitry results in higher resistance and lower capacitance, which is important for high-frequency measurements.
Active probes contain active components, such as FETs or amplifiers. Commonly used for taking high-speed measurements (>500 MHz) or on high-impedance circuits. One limitation is their limited voltage range.
Differential probes are popular for measuring high-frequency signals or signals of very low amplitude.
A current probe measures the electrical current flowing through a conductor.
Tips
• Always use an appropriate probe tip and/or probe tip adapter whenever possible
• Keep ground leads short

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Description Price Probe Type Attenuation Bandwidth Maximum Common Mode Input Voltage Connector Type Model Number p Number of Probes Safety Category Level Safety Category Voltage Series Safety Category Rise Time
RS Stock No. 825-1206
Mfr. Part No.68.9557-28
MYR472.91
1 Set
Set(s)
Passive 1:10 300MHz - BNC 68.9557-28 1 CAT III, CAT IV 600 V, 1000 V SET Isoprobe CAT III 1000 V, CAT IV 600 V -
RS Stock No. 518-0971
Mfr. Part No.99.00170
MYR289.86
1 Set
Set(s)
Passive 1:10 450MHz - BNC 99.00170 - CAT II, CAT III 600 V, 1000 V - CAT II 1000 V, CAT III 600 V 1ns
RS Stock No. 825-1203
Mfr. Part No.68.9559-23
MYR460.74
1 Set
Set(s)
Passive 1:100 500MHz - BNC 68.9559-23 1 CAT I, CAT III, CAT IV 600 V, 1000 V, 3540 V SET Isoprobe CAT I 3540 V, CAT III 1000 V, CAT IV 600 V -
RS Stock No. 825-1209
Mfr. Part No.68.9556-28
MYR514.82
1 Set
Set(s)
Passive 1:10 500MHz - BNC 68.9556-28 1 CAT III, CAT IV 600 V, 1000 V SET Isoprobe CAT III 1000 V, CAT IV 600 V -
RS Stock No. 825-1215
Mfr. Part No.68.9434-23
MYR336.26
1 Set
Set(s)
Passive 1:100 500MHz - BNC 68.9434-23 1 CAT III 300V SET Isoprobe CAT III 300 V -
RS Stock No. 825-1196
Mfr. Part No.68.9554-28
MYR293.71
1 Set
Set(s)
Passive 1:10 250MHz - BNC 68.9554-28 1 CAT III, CAT IV 600 V, 1000 V SET Isoprobe CAT III 1000 V, CAT IV 600 V -
RS Stock No. 825-1212
Mfr. Part No.68.9433-28
MYR356.71
1 Set
Set(s)
Passive 1:10 500MHz - BNC 68.9433-28 1 CAT III 300V SET Isoprobe CAT III 300 V -
RS Stock No. 518-0987
Mfr. Part No.99.00173
MYR328.90
1 Set
Set(s)
Passive 1:10 250MHz - BNC 99.00173 - CAT II, CAT III 600 V, 1000 V - CAT II 1000 V, CAT III 600 V 1.2ns
RS Stock No. 518-0993
Mfr. Part No.99.00224
MYR223.17
1 Set
Set(s)
Passive 1:10 150MHz - BNC 99.00224 - CAT II 1000V - CAT II 1000 V 1.2ns