Fluke is a well-known brand in the field of electrical testing tools, and its clamp meters are highly regarded by professionals and hobbyists alike.
Two popular models, the Fluke 325 and Fluke 324 offer a range of features to suit different needs. This article will compare these two models to help you decide which one is best for your application.
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Overview
Fluke 324 and Fluke 325 are both True RMS clamp meters designed to provide accurate AC voltage, current measurements, and other electrical properties in various environments.
However, there are some distinct differences in their specifications and capabilities that might make one more suitable for specific tasks than the other.
Key Features and Comparison
✅ Check marks in the table below indicate the better specification
| Feature | Fluke 324 | Fluke 325 |
|---|---|---|
| 💳 Price | Check Price | Check Price |
| AC Current Measurement | 400.0 A | 400.0 A |
| DC Current Measurement | No | 400.0 A ✅ |
| AC Voltage Measurement | 600 V | 600 V |
| DC Voltage Measurement | 600 V | 600 V |
| Resistance Measurement | 6000 Ω | 40 kΩ ✅ |
| Capacitance Measurement | Yes | Yes |
| Temperature Measurement | Yes | Yes |
| Frequency Measurement | No | Yes (500 Hz) ✅ |
| True RMS | Yes | Yes |
| Display Hold | Yes | Yes |
| Backlight | Yes | Yes |
| Jaw Opening | 1.2 in (31 mm) | 1.2 in (31 mm) |
| Max Wire Size | 600 MCM | 600 MCM |
| Accuracy – AC Voltage | ±1.50% | ±1.50% |
| Accuracy – AC Current | ±1.50% ✅ | ±2.00% |
| Accuracy – DC Voltage | ±1.00% | ±1.00% |
| Accuracy – DC Current | N/A | ±2.00% ✅ |
| Auto-off | Yes | Yes |
| Category Ratings | CAT III 600 V, CAT IV 300 V | CAT III 600 V, CAT IV 300 V |
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Detailed Comparison
- Current Measurement: The Fluke 325 can measure both AC and DC currents, making it more versatile for tasks involving direct current (DC) applications. In contrast, the Fluke 324 is limited to AC current measurements only.
- Resistance Range: The Fluke 325 offers a higher resistance measurement range (up to 40 kΩ) compared to the Fluke 324 (up to 6000 Ω). This makes the Fluke 325 a better choice for applications that require measuring higher impedance values.
- Frequency Measurement: The Fluke 325 includes a frequency measurement function (up to 500 Hz), which the Fluke 324 does not have. This feature is beneficial for users needing to measure the frequency of electrical signals.
- Accuracy: Both models offer accurate measurements; however, there is a slight difference in AC current accuracy, with the Fluke 324 having a better accuracy (±1.50%) compared to the Fluke 325 (±2.00%). For DC current, the Fluke 325 provides an accuracy of ±2.00%, which is not applicable to the Fluke 324 since it does not measure DC current.
- Additional Features: Both models come with a backlit display and display hold function, which can be useful for working in low-light environments or when needing to capture and hold a reading. Both models also have auto-off functionality to conserve battery life.
Conclusion
The Fluke 324 is a solid choice for those who primarily need to measure AC currents and voltages and perform basic electrical troubleshooting. It is slightly more accurate in AC current measurements and offers essential features like temperature and capacitance measurements.
On the other hand, the Fluke 325 is a more versatile tool, offering additional capabilities such as DC current measurement and frequency measurement. It is ideal for users who need a broader range of measurement functions, especially in more diverse applications that involve both AC and DC currents.
For a broader range of measurement functions and higher resistance measurement capabilities, the Fluke 325 may be the better option. However, if your focus is on AC measurements and you prefer a slightly more accurate AC current reading, the Fluke 324 would be suitable.
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