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
RS Stock No. 146-6617
BrandRS PRO
£45.20
Each
Units
Passive 1:1, 1:10 20 MHz, 250 MHz 600V BNC - 2 CAT I 600V - - CAT I 600 V 1.4 ns, 18 ns
RS Stock No. 146-6614
BrandRS PRO
£20.55
Each
Units
Passive 1:1, 1:10 15 MHz, 150 MHz 600V BNC - 1 CAT I 600V - RS-LF Series CAT I 600 V 2.3 ns, 24 ns
RS Stock No. 146-6619
BrandRS PRO
£133.10
Each
Units
Miniature 1:10 500MHz 500V BNC - 1 CAT I, CAT II 400 Vrms, 500 Vrms - - CAT I 500 Vrms, CAT II 400 Vrms <0.7ns
RS Stock No. 146-6616
BrandRS PRO
£29.56
Each
Units
Passive 1:1, 1:10 20 MHz, 250 MHz 600V BNC - 1 CAT I 600V - - CAT I 600 V 1.4 ns, 18 ns
RS Stock No. 146-6613
BrandRS PRO
£22.44
Each
Units
Passive 1:10 150MHz 20V BNC - 1 CAT I 600V - - CAT I 600 V 2.3ns
RS Stock No. 179-9566
BrandRS PRO
£1,324.21
Each
Units
Differential 1:100, 1:1000 70MHz 5kV BNC - 1 CAT I - - - CAT I 5000 Vrms 5ns
RS Stock No. 179-9565
BrandRS PRO
£443.63
Each
Units
Active 1:10, 1:100 25MHz 700V BNC - - CAT III - - - - 14ns
RS Stock No. 122-8907
Mfr. Part No.FLUKE-123B/UK/S
BrandFluke
£1,602.00
Each
Units
- - 20MHz - - 123B/UK/S - CAT III, CAT IV 600 V, 750 V RSCAL 120B CAT III 750 V, CAT IV 600 V <17.5ns
RS Stock No. 122-8908
Mfr. Part No.FLUKE-123B/UK/S
BrandFluke
£1,635.00
Each
Units
- - 20MHz - - 123B/UK/S - CAT III, CAT IV 600 V, 750 V UKAS 120B CAT III 750 V, CAT IV 600 V <17.5ns
RS Stock No. 122-8904
Mfr. Part No.FLUKE-123B/UK/S
BrandFluke
£1,508.00
Each
Units
- - 20MHz - - 123B/UK/S - CAT III, CAT IV 600 V, 750 V - 120B CAT III 750 V, CAT IV 600 V <17.5ns
RS Stock No. 224-1219
Mfr. Part No.15101
BrandTestec
£275.34
Each
Units
Active, Differential 1:10, 1:100 25MHz 700V BNC TT-SI 9001 - CAT III 1000 V ac, 1400 V ac/dc - SI CAT III 1000 V ac, CAT III 1400 V 14ns
RS Stock No. 481-0823
Mfr. Part No.P2220
BrandTektronix
£129.00
Each
Units
Passive 1:1, 1:10 200MHz - - P2220 - CAT II 150 V, 300 V - TPS2000 CAT II 15 V, CAT II 300 V -
RS Stock No. 725-6604
Mfr. Part No.P6139B
BrandTektronix
£469.00
Each
Units
Passive 1:10 500MHz - BNC P6139B - CAT II 300V - - CAT II 300 V -
RS Stock No. 715-8733
Mfr. Part No.TPP0101
BrandTektronix
£49.00
Each
Units
Passive, Voltage 1:10 100MHz 300V BNC TPP0101 - CAT I, CAT II 300 V, 300 V ac, 400 V ac - TPP CAT I 400 V ac, CAT II 300 V, CAT II 300 V ac 3.5ns
RS Stock No. 898-6744
Mfr. Part No.TA041
£269.00
Each
Units
Active, Differential 1:10, 1:100 25MHz 700V - - 2 CAT III 700 Vrms, ±700 V - - 700 Vrms, CAT III ±700 V -
RS Stock No. 661-3295
Mfr. Part No.P6316
BrandTektronix
£562.00
Each
Units
Logic, Passive - - - - P6316 - - - - - - -
RS Stock No. 224-1225
Mfr. Part No.SI-9002
BrandTestec
£262.17
Each
Units
Active, Differential 1:20, 1:200 25MHz 1kV - TT-SI 9002 - CAT III 1000 V ac, 1400 V ac/dc - SI CAT III 1000 V ac, CAT III 1400 V 14ns
RS Stock No. 781-0807
Mfr. Part No.TCP0030A
BrandTektronix
£3,900.00
Each
Units
Current - 120MHz - BNC TCP0030A 1 CAT II 150 V, 300 V - TCP CAT II 150 V, CAT II 300 V 2.92ns
RS Stock No. 898-6750
Mfr. Part No.TA044
£639.00
Each
Units
Active, Differential 1:100, 1:1000 70MHz 5kV - - 2 CAT I 2500 Vrms, 7000 V ac/dc - - 2500 Vrms, CAT I 7000 V ac/dc 5ns
RS Stock No. 796-6702
Mfr. Part No.P6015A
BrandTektronix
£2,020.00
Each
Units
High Voltage 1:1000 75MHz 20kV - P6015A 1 - - - - - 4ns
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