Oscilloscope Probes

Oscilloscope probes are a type of device commonly used by electrical engineers that can connect a signal source to an oscilloscope. The probe is a single input device that can divert the electrical signal to the scope. Oscilloscope probes can be used in various applications and can range from a simple wire like a passive probe to a more complex device.

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:

  • 1x: no attenuation
  • 10x: factor-of-10 attenuation
  • 100x: factor-of-100 attenuation
  • 1000x: 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庫存編號 448-4351
製造零件編號15120
BrandTestec
TWD25,302.00
單位
Active, Differential 1:100, 1:1000 100MHz 1kV BNC TT-SI 9110 - - - SI CAT III 1000 V, CAT III 1400V 3.5ns
RS庫存編號 224-1219
製造零件編號15101
BrandTestec
TWD13,767.00
單位
Active, Differential 1:10, 1:100 25MHz 700V BNC TT-SI 9001 - - - SI CAT III 1000 V, CAT III 1400V 14ns
RS庫存編號 224-1225
製造零件編號SI-9002
BrandTestec
TWD14,218.00
單位
Active, Differential 1:20, 1:200 25MHz 1kV - TT-SI 9002 - - - SI CAT III 1000 V, CAT III 1400V 14ns
RS庫存編號 781-0801
製造零件編號TCP312A
BrandTektronix
TWD104,894.00
單位
Current - 100MHz - BNC TCP312A 1 - - TCP300 CAT II 150 V, CAT II 300V 3.5ns
RS庫存編號 512-6438
製造零件編號TT-SI 9101
BrandTestec
TWD31,408.00
單位
Active, Differential 1:10, 1:100 100MHz 1kV BNC TT-SI 9101 - - - SI CAT III 1000V 3.5ns
RS庫存編號 734-5026
製造零件編號P5205A
BrandTektronix
TWD79,122.00
單位
Differential, High Voltage 1:50, 1:500 100MHz 1kV - P5205A - - - P52XXA CAT II 1000V -
RS庫存編號 898-6832
製造零件編號TA061
TWD12,136.00
單位
Passive 1:10 1.5GHz 12V SMA - 1 - - - 12V 240ps
RS庫存編號 752-7357
製造零件編號THDP0200
BrandTektronix
TWD96,303.00
單位
Differential, High Voltage 1:50, 1:500 200MHz 1.5kV BNC THDP0200 - - - THD CAT II 1000 V, CAT III 600V 1.8ps
RS庫存編號 752-7353
製造零件編號THDP0100
BrandTektronix
TWD163,328.00
單位
Differential, High Voltage 1:100, 1:1000 100MHz 6kV BNC THDP0100 - - - THD CAT I 2300 V, CAT III 1000V 3.5ps
RS庫存編號 725-6604
製造零件編號P6139B
BrandTektronix
TWD25,048.00
單位
Passive 1:10 500MHz - BNC P6139B - - - - CAT II 300V -
RS庫存編號 781-0807
製造零件編號TCP0030A
BrandTektronix
TWD199,389.00
單位
Current - 120MHz - BNC TCP0030A 1 - - TCP CAT II 150 V, CAT II 300V 2.92ns
RS庫存編號 726-0041
製造零件編號TPP0201
BrandTektronix
TWD3,029.00
單位
Passive 1:10 200MHz 300V BNC TPP0201 - - - TPP CAT I 400 V, CAT II 300 V, CAT II 300V 2.3ns
RS庫存編號 712-1141
製造零件編號P5122
BrandTektronix
TWD15,508.00
單位
High Voltage, Passive 1:100 200MHz - - P5122 - - - TPS2000 CAT II 1000 V, CAT II 600V 2.2ns
RS庫存編號 716-7419
製造零件編號VPS420-R
BrandFluke
TWD9,992.00
單位
Passive 1:100 150MHz - - VPS420 R 1 - - ScopeMeter 190 CAT III 2000V -
RS庫存編號 898-6750
製造零件編號TA044
TWD33,457.00
單位
Active, Differential 1:100, 1:1000 70MHz 5kV - - 2 - - - CAT I 7000V, 2500 V 5ns
RS庫存編號 797-3390
製造零件編號TPP0500B
BrandTektronix
TWD23,149.00
單位
Passive 1:10 500MHz 300V Hook Clip TPP0500B 1 - - TPP0 CAT II 300V -
RS庫存編號 825-1203
製造零件編號68.9559-23
BrandStaubli
TWD3,788.00
整套:1 個
Set(s)
Passive 1:100 500MHz - BNC 68.9559-23 1 - - SET Isoprobe CAT I 3540 V, CAT III 1000 V, CAT IV 600V -
RS庫存編號 209-7860
製造零件編號P6243
BrandTektronix
TWD109,201.00
單位
Active 1:10 1GHz - BNC P6243 - - - - - 350ps
RS庫存編號 481-0823
製造零件編號P2220
BrandTektronix
TWD6,511.00
單位
Passive 1:1, 1:10 200MHz - - P2220 - - - TPS2000 CAT II 150 V, CAT II 300V -
RS庫存編號 922-5270
製造零件編號PP026-1
TWD16,958.00
單位
Passive 1:10 500MHz - BNC PP026 1 - - - CAT I 500 V, CAT II 400V 700ps