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 Calibrated Series Safety Category Rise Time Minimum Bandwidth
RS Stock No. 705-7101
Mfr. Part No.CP 35
£380.08
Each
Units
- - - - BNC CP- 35 - CAT III 300V UKAS - CAT III 300 V - -
RS Stock No. 734-5013
Mfr. Part No.P5100A
BrandTektronix
£559.00
Each
Units
Passive 1:100 500MHz 1kV - P5100A - CAT II 1000V ac - 5000 CAT II 1000V 700ps -
RS Stock No. 734-5029
Mfr. Part No.P5200A
BrandTektronix
£1,120.00
Each
Units
Differential, High Voltage 1:50, 1:500 50MHz 1kV - P5200A - CAT II 1000V - P52XXA CAT II 1000V - -
RS Stock No. 705-7145
Mfr. Part No.CP1005
£336.22
Each
Units
- - - - BNC CP-1005 - CAT III 300V UKAS - CAT III 300 V - -
RS Stock No. 705-1913
Mfr. Part No.CP1005
£266.22
Each
Units
- - 200MHz - BNC CP-1005 - CAT III 300V - - CAT III 300 V - -
RS Stock No. 209-7860
Mfr. Part No.P6243
BrandTektronix
£2,325.60
Each
Units
Active 1:10 1GHz - BNC P6243 - - - - - - 350ps -
RS Stock No. 705-7154
Mfr. Part No.CP1005
£315.72
Each
Units
- - - - BNC CP-1005 - CAT III 300V RSCAL - CAT III 300 V - -
RS Stock No. 901-0970
Mfr. Part No.PK400-0
£6.136
Each (In a Pack of 22)
Units
Gripper - - - - - 22 - - - - - - -
RS Stock No. 811-1246
Mfr. Part No.VPS420-V
BrandFluke
£234.00
Each
Units
Passive 1:100 150MHz 300V - VPS420 - CAT III, CAT IV 600 V, 1000V - VPS420 CAT III 1000 V, CAT III 2000 V, CAT IV 1200 V, CAT IV 600V - -
RS Stock No. 851-3087
Mfr. Part No.HVP120
£445.00
Each
Units
Passive 1:100 400MHz - BNC HVP120 - CAT I, CAT II 1000 V, 6000V - HVP CAT I 6000 V, CAT II 1000V 900ps -
RS Stock No. 726-0041
Mfr. Part No.TPP0201
BrandTektronix
£64.00
Each
Units
Passive 1:10 200MHz 300V BNC TPP0201 - CAT I, CAT II 300 V ac, 300 V, 400V ac - TPP CAT I 400 V, CAT II 300 V, CAT II 300V 2.3ns -
RS Stock No. 898-6766
Mfr. Part No.TA057
£269.00
Each
Units
Active, Differential 1:20, 1:200 25MHz 1kV - - 2 CAT III 1000 V, ±1400V - - 1000 V, CAT III ±1400V - -
RS Stock No. 448-4351
Mfr. Part No.15120
BrandTestec
£444.47
Each
Units
Active, Differential 1:100, 1:1000 100MHz 1kV BNC TT-SI 9110 - CAT III 1000 V ac, 1400V ac/dc - SI CAT III 1000 V, CAT III 1400V 3.5ns -
RS Stock No. 734-5026
Mfr. Part No.P5205A
BrandTektronix
£1,650.00
Each
Units
Differential, High Voltage 1:50, 1:500 100MHz 1kV - P5205A - CAT II 1000V - P52XXA CAT II 1000V - -
RS Stock No. 668-7151
Mfr. Part No.P6245
BrandTektronix
£3,220.00
Each
Units
Active 1:10 1.5GHz - BNC P6245 - - - - - - 250ps -
RS Stock No. 898-6769
Mfr. Part No.TA058
£339.00
Each
Units
Active, Differential 1:10 50MHz 600V - - 2 CAT I 600 V, ±700V - - 600 V, CAT I ±700V - -
RS Stock No. 661-3292
Mfr. Part No.TDP0500
BrandTektronix
£3,890.00
Each
Units
Differential, High Voltage 1:5, 1:50 500MHz 30V - TDP0500 - - - - TDP - 700ps -
RS Stock No. 801-4868
Mfr. Part No.AP031
£560.00
Each
Units
Differential 1:10, 1:100 25MHz 700V BNC AP031 - CAT III 1000V - - CAT III 1000V 14ns -
RS Stock No. 781-0810
Mfr. Part No.TCP305A
BrandTektronix
£1,850.00
Each
Units
Current - 50MHz - BNC TCP305A 1 CAT II 150 V, 300 V - TCP300 CAT II 150 V, CAT II 300 V 7ns -
RS Stock No. 575-585
Mfr. Part No.P2221
BrandTektronix
£136.00
Each
Units
Passive 1:1, 1:10 200MHz - - P2221 - CAT II 150 V, 300V - - CAT II 15 V, CAT II 300V - -