Two of Fieldpiece’s most popular clamp meters, the SC660 and the SC680, are often compared by HVAC professionals. Both are built tough, feature True RMS accuracy, and deliver the performance Fieldpiece is known for – but they target slightly different users.
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If you’re trying to decide between the SC660 and the SC680, this side-by-side comparison breaks down their key features, differences, and ideal use cases.
📋 Overview of the Fieldpiece SC660
The Fieldpiece SC660 is part of Fieldpiece’s Advanced Series clamp meters. It’s engineered for technicians who need precision, durability, and the right balance of essential and advanced features for daily HVAC diagnostic work.
Key Features:
- True RMS accuracy for precise measurements
- Measures AC/DC voltage and current
- Microamps for testing flame sensors
- Inrush current measurement
- Dual display with bright backlight
- Temperature measurement with included thermocouple
- Jaw opening: 1.3 inch
- Non-contact voltage (NCV) detection
The SC660 delivers a strong mix of professional-grade features and ease of use, making it an excellent choice for technicians who need reliable performance without extra complexity.
📋 Overview of the Fieldpiece SC680
The Fieldpiece SC680 sits at the top of Fieldpiece’s lineup. It includes all the capabilities of the SC660 – and then some, with higher measurement ranges, power and harmonic analysis, and Bluetooth connectivity for data logging and the Job Link® app.
Key Features:
- True RMS accuracy
- Measures AC/DC voltage and current up to 1000A
- Power (Watt) measurement capability
- Total harmonic distortion (THD) and phase rotation testing
- Bluetooth connectivity for Fieldpiece Job Link® app
- Dual display with backlight
- Microamps and temperature measurement
- Jaw opening: 1.5 inch
- Non-contact voltage (NCV) detection
The SC680 is designed for advanced HVAC and electrical professionals who demand top-tier diagnostics, connectivity, and precision.
🔍 Side-by-Side Comparison
| Feature / Spec | Fieldpiece SC660 | Fieldpiece SC680 |
|---|---|---|
| Series | Advanced Series | Top-of-the-Line Series |
| True RMS | Yes | Yes |
| AC Current Range | Up to 600A | Up to 1000A |
| Jaw Opening | 1.3 inch | 1.5 inch |
| Voltage Measurement | AC/DC | AC/DC |
| Microamps for Flame Sensors | Yes | Yes |
| Inrush Current | Yes | Yes |
| Power (Watt) Measurement | No | Yes |
| Harmonics / THD | No | Yes |
| Phase Rotation | No | Yes |
| Bluetooth / App Support | No | Yes (Job Link® app) |
| Display | Dual display with backlight | Dual display with backlight |
| Temperature Measurement | Yes | Yes |
| Non-Contact Voltage (NCV) | Yes | Yes |
| Best For | HVAC pros needing precision and simplicity | Advanced users needing power analysis and app connectivity |
| Price | 💲 Check Price | 💲 Check Price |
✅ Pros and Cons
Fieldpiece SC660
Pros:
- Reliable and accurate True RMS measurements
- Covers essential HVAC diagnostic needs
- Dual display and temperature measurement
- Slightly more affordable than the SC680
- Easy to use and rugged design
Cons:
- No Bluetooth or Job Link® app support
- Lower current range (600A max)
- No power or harmonic measurement features
Fieldpiece SC680
Pros:
- Higher current range (up to 1000A)
- Measures power (Watt), THD, and phase rotation
- Bluetooth connectivity for Job Link® app integration
- Larger jaw opening for thicker conductors
- Excellent for advanced diagnostics and system analysis
Cons:
- Higher price point
- Slightly larger and heavier than the SC660
🏆 Verdict: SC660 vs SC680
Choose the Fieldpiece SC660 if you want a rugged, accurate, and feature-rich clamp meter for everyday HVAC and electrical work – without needing Bluetooth or advanced analytics.
💲 Check Price for Fieldpiece SC660
Choose the Fieldpiece SC680 if you want premium diagnostic capabilities, power measurement, and wireless connectivity to streamline your testing workflow.
💲 Check Price for Fieldpiece SC680
Both models deliver the performance Fieldpiece is known for, but the SC680 edges ahead for power users and advanced technicians who need expanded functionality. The SC660, meanwhile, remains one of the best all-around clamp meters for HVAC pros who value reliability and efficiency at a lower cost.
