---
product_id: 384373620
title: "9-30v Car Circuit Tester 12V 24V Power Circuit Probe Kit Automobile Relay TesterDigital Multimeter Oscilloscope&Injector Test Tool Diode Tester Voltage Detector for Truck Marine Motorcycle Boat"
brand: "topdiag"
price: "€ 30.06"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.ie/products/384373620-9-30v-car-circuit-tester-12v-24v-power-circuit-probe
store_origin: IE
region: Ireland
---

# 9-30V wide voltage range 320x240 DPI TFT color display 18A max continuous current 9-30v Car Circuit Tester 12V 24V Power Circuit Probe Kit Automobile Relay TesterDigital Multimeter Oscilloscope&Injector Test Tool Diode Tester Voltage Detector for Truck Marine Motorcycle Boat

**Brand:** topdiag
**Price:** € 30.06
**Availability:** ❌ Out of Stock

## Summary

> 🚗 Power Your Precision: The Ultimate Circuit Tester for the Modern Mechanic

## Quick Answers

- **What is this?** 9-30v Car Circuit Tester 12V 24V Power Circuit Probe Kit Automobile Relay TesterDigital Multimeter Oscilloscope&Injector Test Tool Diode Tester Voltage Detector for Truck Marine Motorcycle Boat by topdiag
- **How much does it cost?** € 30.06 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/384373620-9-30v-car-circuit-tester-12v-24v-power-circuit-probe)

## Best For

- topdiag enthusiasts

## Why This Product

- Trusted topdiag brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Complete Kit for On-the-Go Pros:** Includes 6m test line, copper probes, relay connectors, and toolbox for ultimate convenience.
- • **Customizable Display & Online Upgrades:** Stay ahead with optional screen styles and seamless firmware updates.
- • **Pro-Grade Oscilloscope & Multimeter Combo:** Visualize and measure voltage, resistance, current, frequency with precision.
- • **All-in-One Automotive Diagnostic Powerhouse:** From relay to injector tests, get every circuit insight in one sleek kit.
- • **Smart Safety with Adjustable Circuit Breaker:** Protect your vehicle and device with intelligent overload control.

## Overview

The TopDiag P200 9-30V Car Circuit Tester is a professional-grade diagnostic tool designed for 12V and 24V automotive systems. Featuring a high-resolution 320x240 TFT color display, it combines multimeter, oscilloscope, relay, injector, and diode testing functions in one compact kit. With an adjustable 0-5V power supply, intelligent circuit breaker protection, and support for online firmware upgrades, it ensures accurate, safe, and up-to-date diagnostics for cars, trucks, motorcycles, and marine vehicles. The comprehensive accessory set and robust build make it ideal for professional mechanics and serious DIYers alike.

## Description

Main functions: 1. Intelligent identification of voltage / resistance 2. Multimeter mode (measuring voltage, resistance, diode, on-off, current and frequency) 3. Relay test 4. Injector test 5. Diode test 6. Oscilloscope function 7.0-5v adjustable power supply 8. Vehicle component activation 9. Positive and negative polarity test 10 intelligent circuit breaker protection (overload adjustable) 11. Screen style and background are optional 12. Online network upgrade Product specifications and parameters: ① Display screen: (320 * 240 DPI) TFT true color display screen ② Operating temperature: 0 - 60 ° C (32 - 140 f °) ③ Storage temperature: 40 - 70 ° C (- 40 - 185 f °) ④ External power supply: 12V or 24V, powered by battery ⑤ Working voltage: 9v-30v ⑥ Measuring voltage: 10.1v-50v ⑦ Resistance measurement range: 1 ohm ~ 200K ohm ⑧ Current measurement range: 0 ~ 18a ⑨ Maximum continuous current: 18a Product packing list <1. Black cat test host 6 meters long test line <2. All copper probe <3. Double pass test connector 4. Private model alligator clip battery connecting line 5. Relay test line 6. Probe adapter 7. 25amp fuse 8. Operation instructions 9. Product toolbox Weight: 2.6kg Size: 38.5 * 29.2 * 10.7 cm

Review: I am A motorcycle mechanic. Bought this in hopes it would cover all my s of an expensive power prob. This power prob works out of this world. It an extremely easy to use and operate. Its functionality is extremely reliable and clean signal reading. I recommend this for any type of mechanical work you are doing.
Review: Worst purchase ever. Stopped working just after a month. They don't pickup the call and even don't reply the email for warranty claim.

## Features

- 🚘Main functions of automobile circuit test: 1. Intelligent recognition of voltage and resistance 2. Relay test 3. Injector test 4. Multimeter mode (measure voltage, resistance, diode, on-off, current, frequency) 5. Oscilloscope function 6. (0- 5V) Adjustable power supply 7. Vehicle component activation 8. Positive and negative polarity test 9. Intelligent circuit breaker protection (overload adjustable) 10 screen film style background optional 11. Online upgrade
- 🚘Product specifications and parameters: ① Operating temperature: 0 - 60 ° C (32 - 140 f °) ② Storage temperature: 40 - 70 ° C (- 40 - 185 f °) ③ External power supply: 12V or 24V, powered by battery ④ Minimum working voltage: 9V -- 30V ⑤ Maximum measured voltage: 0.1V -- 150V ⑥ Resistance measurement range: 1 ohm ~ 200K ohm ⑦ Measuring current range: 0 ~ 18a ⑧ Maximum continuous current: 18a
- 🚘Product list: ① test host 6m long test line ② All copper probe ③ Double pass test connector ④ Crocodile clip battery connector ⑤ Relay test line ⑥ Probe adapter ⑦ 25amp fuse ⑧ Operation instruction ⑨ Product toolbox
- 🚘Size and weight: Weight: 2.6kg Size: 38.5 * 29.2 * 10.7 cm
- 🚘About service: extensive application, professional diagnosis, support multi language. If you have any questions about Auto series and communication protocol, please email us and we will reply to you within 24 hours

## Technical Specifications

| Specification | Value |
|---------------|-------|
| AC Adapter Current | 18 Amps |
| ASIN | B0912YBNQP |
| Are batteries included? | No |
| Brand | TopDiag |
| Colour | black red |
| Customer Reviews | 4.4 4.4 out of 5 stars (497) |
| Date First Available | 27 August 2021 |
| Item Dimensions LxWxH | 38.5 x 29.2 x 10.7 Centimeters |
| Item Height | 10.7 Centimeters |
| Item Weight | 1 kg 200 g |
| Item Width | 29.2 Centimeters |
| Item dimensions L x W x H | 38.5 x 29.2 x 10.7 Centimeters |
| Item model number | P200 |
| Manufacturer | TopDiag |
| Maximum Operating Voltage | 30 Volts |
| Measurement Type | Multimeter |
| Min. Operating Voltage | 9 Volts |
| Model number | P200 |
| Power Source | Battery Powered |
| Product Dimensions | 38.5 x 29.2 x 10.7 cm; 1.2 kg |
| Specification Met | CE |
| UPC | 791734860403 |

## Product Details

- **Brand:** TopDiag
- **Colour:** black red
- **Item Weight:** 1200 Grams
- **Item dimensions L x W x H:** 38.5 x 29.2 x 10.7 Centimeters
- **Power Source:** Battery Powered

## Images

![9-30v Car Circuit Tester 12V 24V Power Circuit Probe Kit Automobile Relay TesterDigital Multimeter Oscilloscope&Injector Test Tool Diode Tester Voltage Detector for Truck Marine Motorcycle Boat - Image 1](https://m.media-amazon.com/images/I/415+xlUydnL.jpg)
![9-30v Car Circuit Tester 12V 24V Power Circuit Probe Kit Automobile Relay TesterDigital Multimeter Oscilloscope&Injector Test Tool Diode Tester Voltage Detector for Truck Marine Motorcycle Boat - Image 2](https://m.media-amazon.com/images/I/41X2U1xNDaL.jpg)
![9-30v Car Circuit Tester 12V 24V Power Circuit Probe Kit Automobile Relay TesterDigital Multimeter Oscilloscope&Injector Test Tool Diode Tester Voltage Detector for Truck Marine Motorcycle Boat - Image 3](https://m.media-amazon.com/images/I/512y38UlccL.jpg)
![9-30v Car Circuit Tester 12V 24V Power Circuit Probe Kit Automobile Relay TesterDigital Multimeter Oscilloscope&Injector Test Tool Diode Tester Voltage Detector for Truck Marine Motorcycle Boat - Image 4](https://m.media-amazon.com/images/I/5166VyyYJzL.jpg)
![9-30v Car Circuit Tester 12V 24V Power Circuit Probe Kit Automobile Relay TesterDigital Multimeter Oscilloscope&Injector Test Tool Diode Tester Voltage Detector for Truck Marine Motorcycle Boat - Image 5](https://m.media-amazon.com/images/I/51EfyclV0jL.jpg)

## Questions & Answers

**Q: does it check house current?**
A: This is for DC current tests only which uses batteries such as boats , riding mowers and automobiles. It will do both 12 and 24 volt systems. Does not work with AC voltage or current in homes

**Q: Can you check for voltage by just holding the probe against a wire or do you have to pierce the insulation on the wire?**
A: You have to pierce the wire. I suggest if you do, dab a bit of silicone sealant to the hole to keep out moisture and avoid corrosion. I would also suggest getting the back probe set to avoid piercing wires if that is a concern.

**Q: Does the colour of the tool refer to any differences?**
A: The picture is the real color, and the product is taken in kind

**Q: Does this come with extension cable?**
A: If you are working on trailers or the like you will need to purchase the extension. However the cord it comes with should be long (20FT) enough to work on any part of a car or light truck that you need to access.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***P on 8 November 2024*

I am A motorcycle mechanic. Bought this in hopes it would cover all my s of an expensive power prob. This power prob works out of this world. It an extremely easy to use and operate. Its functionality is extremely reliable and clean signal reading. I recommend this for any type of mechanical work you are doing.

### ⭐ Review
*by S***R on 31 October 2023*

Worst purchase ever. Stopped working just after a month. They don't pickup the call and even don't reply the email for warranty claim.

### ⭐⭐⭐⭐ Review
*by E***L on 26 December 2023*

This has all the bells and whistles, but not much other accessories. I had asked if they had an extension for working on trailer wiring, the seller wrote back and said one is not needed because of the 20' cord...(apparently short trailers in china). One thing I need for farm repairs is tracing trailer and damaged equipment wiring. I had to buy a 30' wire extension reel from HF., but that's not a great solution. There is a voltmeter (only to tenth of a volt), a ohmmeter/beeper, a relay test jig, crude o-scope, a wire identifier (indicates a + or a gnd source), an adjustable power source up to 5V @ 100ma for testing, and adjustable current limit feature to supply the tip with either a positive 12V or grounded tip (this is a relay switching circuit that you can hear when in pulse mode). This tip activation mode is controlled in the menu and may be safer than just a probe with a rocker switch... I don't know how robust this circuit is, just using it to test those pesky LED trailer lights so far, though it should test a brake coil (3-4A ea). This puts everything in one package but recommend at least have a good DMM, because the black lead is always grounded. It is hard to remember NOT to use it like a multimeter, don't measure across something unless it is disconnected. The assembled "smart hook" is huge with the probe attached, fortunately, you can remove the probe tip and use the jumper wire to the probe for using just the probe. I have not used its other features much, trailer wiring,AC relays and switches. I am not sure why this product would need an update, unless they suspected there were bugs, it is not a internet device. NOTE: while the hookup clamps are pretty large, one side of the jaw has no connection... There is no mention of how to use the current feature in the DMM section. You need to push the ok button ( push ok and arrow down at the same time to latch it on) and the green light comes on and supplies ground thru the meter tip to measure current. This means you need the power already supplied to the part. Hitting the ok button to deactivates the current mode,but one time it stayed on and I had to disconnect power to reset it(bug). Another way would be to use the "activation" to supply power and that reads current, B+ voltage and tip voltage (load voltage) up to the set limit. There is a link for the manual on the amazon page.

## Frequently Bought Together

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-26*