The Fluke 175 and Fluke 177 are both part of Fluke’s 170 Series of True RMS digital multimeters. They share many features but differ in usability, accuracy, and a few convenience options. The 175 is the more budget-friendly option, while the 177 provides extra precision and a backlit display for those who need it.
🔍 Overview
The Fluke 175 is designed as a reliable, professional-grade multimeter with all the essential functions for electrical and maintenance work.
The Fluke 177 builds on that with additional display features, higher DC voltage accuracy, and a backlight, making it more suitable for users who need added precision or work in low-light conditions.
📊 Comparison Table
| Specification | Fluke 175 | Fluke 177 |
|---|---|---|
| Maximum Voltage (AC/DC) | Up to 1000 V | Up to 1000 V |
| Resolution / Counts | 6000 counts, 3¾ digit mode | 6000 counts |
| Accuracy (DC Voltage) | ±(0.15% + 2) typical | ±(0.09% + 2) |
| Accuracy (AC Voltage) | ±(1.0% + 3) | ±(1.0% + 3) |
| Other measurement functions | Resistance, continuity, diode, frequency, capacitance | Same functions |
| Display & Features | Standard LCD display, no backlight | Backlit display, analog bar graph, faster updates |
| Safety / Rating | CAT IV 600 V / CAT III 1000 V | CAT IV 600 V / CAT III 1000 V |
| Battery life | ~200 hours | ~200 hours without backlight |
| Size and weight | Approx 185 × 90 × 43 mm, 420 g | Same dimensions and weight |
✅ Pros & Cons
Fluke 175
Pros
- Wide voltage range and robust safety ratings
- True RMS for accurate measurement of non-linear signals
- Excellent balance of features and cost
- Reliable for professional and industrial use
Cons
- No backlight, harder to read in dim environments
- Slightly less DC accuracy than the 177
- Lacks advanced display features
Fluke 177
Pros
- Backlit display for low-light conditions
- Analog bar graph and faster display updates
- Higher DC voltage accuracy than the 175
- Excellent build quality and professional-grade performance
Cons
- Higher price point
- Extra features may not be necessary for basic use
🧭 Which Should You Choose?
If you are looking for a reliable, professional multimeter with all the essential functions at a reasonable cost, the Fluke 175 is a solid choice. It’s well-suited for industrial, electrical, and maintenance work where a backlight or ultra-high DC accuracy isn’t critical.
If you often work in low-light environments, require extra display features, or want the highest DC accuracy available in the 170 series, the Fluke 177 is worth the additional investment.
Both models are excellent tools, and your decision comes down to whether you need the added convenience and precision of the 177 or prefer the value of the 175.