Fluke’s multimeter offerings span entry level to high performance. Two models that sometimes get compared are the Fluke 175 (from the 170 series) and the Fluke 77-IV (from the 70 series). While both are true-RMS capable, they target somewhat different users and applications. Let’s dig into how they compare and help you pick between them.
Overview & Target Use
Fluke 175
A mid-tier model in the 170 series, optimized for general professional use. It offers good performance, safety ratings, and broad measurement capabilities, at a reasonable price.
Fluke 77-IV
A rugged, mid-level model in the 70 series, often praised for its durability, build quality, and performance in field and industrial settings. While older than the 170 series, it remains in use for its reliability.
Spec Comparison Table
| Feature | Fluke 175 | Fluke 77-IV |
|---|---|---|
| True RMS | Yes | Yes |
| Maximum Voltage (AC / DC) | Up to 1000 V | Up to 1000 V |
| Resolution / Counts | 6000 counts | 6000 counts |
| DC Voltage Accuracy | ±0.15% typical | Similar or slightly better |
| AC Voltage Accuracy | ±1.0% | Comparable |
| Current (AC / DC) | Up to 10 A | Up to 10 A |
| Frequency / Capacitance / Resistance / Continuity | Yes | Yes |
| Display Features | Basic LCD, no backlight | Backlit display, analog bar graph |
| Safety Rating | CAT IV 600 V / CAT III 1000 V | Similar safety ratings |
| Ruggedness / Build | Durable, modern design | Extremely rugged, built for industrial use |
| Typical Price Positioning | Mid-range | Often higher, especially in used market |
Pros & Cons
Fluke 175
Pros
- Balanced specs, robust safety levels
- More modern design and parts support
- Great value for professional users needing core features
- True RMS for accurate AC readings
Cons
- Less rugged than the 77-IV
- Display is more basic, no backlight
- May lack some refinements found in 70 series
Fluke 77-IV
Pros
- Highly durable and rugged
- Backlit display and analog bar graph for usability
- Longstanding reputation in industrial use
- Strong support in repair/service communities
Cons
- Older design with limited parts support
- Can be costly in good condition on secondary markets
- May lack newer features from the 170 series
- More niche appeal
Which One Should You Choose?
If you want a modern, reliable all-around meter for electrical, maintenance, and general field use, the Fluke 175 is likely the better option. It offers up-to-date support and strong performance across most applications.
If you often work in rugged environments, rely on long-proven tools, or specifically want the durability of the 70 series, the Fluke 77-IV still shines—provided you can find one in good working condition.