Can this be used to test output on microwave Transformers?

Yes. I have used it to check the HV output of a microwave and neon transformers. Be careful. Use one hand to measure and the other hand in your pocket.

Can this be used with oscilloscope to measure ac beside 60hz sinusoidal? what is bandwidth?

I suppose it could, though the signal could potentially be noisy. The leads are not shielded. You would also have to correct the impedance. This probe uses a simple voltage-divider resistor network to do its magic. Good luck!

Could this be use to probe the residual high voltage in a CRT monitor (and to dissipate it)?

Yes, definitely. The probe's input resistance in 1G-ohm (1000 M-ohm). With a typical 500pF filter capacitance in the CRT HV power supply, the discharge rate will be 0.5 seconds to discharge to 37% of the original voltage, 1 second to 37% of that, etc. After 5 seconds there will be only a couple of volts remaining. BE SURE to attach the ground clip to the metal chassis of the CRT device whether or not the probe is connected to a meter. To be completely safe, wait a minute after discharging then repeat the process. The glass in the CRT "absorbs" some charge and can recharge the filter capacitor to a few hundred volts.

can it measure 12 volt vehicle ignition coils?

I could not say for sure. But the probe does indeed measure DC voltage up to 40,000 volts. So you should be able to set your meter that you have the probe plugged into and make the measurement, by setting your meter to read DC volts. (not AC volts) Obviously you're only dealing with 12v on automotive voltage.

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EX ELECTRONIX Express High Voltage Probe 40,000 Volts Max DC, 28,000 Volts Max AC (50/60 Hz)

EX ELECTRONIX Express High Voltage Probe 40,000 Volts Max DC, 28,000 Volts Max AC (50/60 Hz)

Product ID: 170464798

Details

Brand
EX ELECTRONIX
Color
Red Black
Item dimensions L x W x H
7 x 2 x 2
Power Source
Corded
Style
40 000 Volts

⚡40,000V max DC power

📏1,000:1 precision division ratio

🔋1,000MΩ ultra-high input impedance

€ 205.26

Duties & taxes included

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Description

⚡ Power up your precision — probe like a pro!

TOP RATED PERFORMANCE - Join thousands of pros who rate it 4.6/5 for dependable high-voltage testing.
PRECISION YOU CAN TRUST - Accuracy within ±1% up to 20kV DC ensures reliable diagnostics every time.
ROBUST INDUSTRIAL DESIGN - Compact 13.4-inch probe built to endure demanding environments up to 50°C.
ULTRA HIGH INPUT IMPEDANCE - 1,000MΩ input impedance minimizes circuit loading for true readings.
UNMATCHED VOLTAGE HANDLING - Safely measure up to 40,000V DC and 28,000V AC with confidence.

The EX ELECTRONIX Express High Voltage Probe delivers industry-leading voltage measurement up to 40,000V DC and 28,000V AC with exceptional accuracy and ultra-high input impedance. Designed for professionals demanding reliable, precise diagnostics in industrial settings, this compact and durable probe ensures safe, accurate readings every time.

Specifications

ASIN	B00LW5UKQ6
Best Sellers Rank	#288,106 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,151 in Test Probes & Leads
Brand Name	EX ELECTRONIX EXPRESS
Color	Red, Black
Customer Reviews	4.6 4.6 out of 5 stars (66)
Included Components	High Voltage Probe, User Manual
Item Dimensions	7 x 2 x 2 inches
Item Length	13.39 inches
Manufacturer	RSR ELECTRONICS
Model	HVP40
Number of Items	1
Part Number	HVP40
Power Source	Corded Electric
Style Name	40,000 Volts Max DC, 28,000 Volts Max AC
UPC	714833891352
Unit Count	1 Count
Upper Temperature Rating	50 °C

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