Klein Tools continues to build a strong reputation for reliable, professional-grade electrical instruments used by electricians and HVAC technicians worldwide. The CL320 and CL445 clamp meters sit in the mid-range of Klein’s lineup, offering True RMS accuracy, auto-ranging features, and solid build quality suited for field use.
🏷️ Klein Multimeter Deals ⭐⭐⭐⭐
While both are capable tools, they differ in versatility, measurement range, and smart functionality. Here’s how they compare.
🏷️ Klein Clamp Meter Deals ⭐⭐⭐⭐
🔍 Overview
The Klein CL320 is a compact True RMS clamp meter designed for general electrical maintenance and troubleshooting. It provides accurate AC current, voltage, resistance, and continuity measurements, with auto-ranging for simplified operation. Ideal for electricians, it’s a straightforward meter with reliable performance in residential and light commercial settings.
The Klein CL445 expands on the CL320’s foundation by introducing DC current measurement, temperature capability, and Bluetooth connectivity via the Klein Tools App. These added features make it a great choice for technicians working in mixed AC/DC environments, HVAC applications, and smart diagnostic workflows.
📊 Specification Comparison
| Feature | Klein CL320 | Klein CL445 |
|---|---|---|
| True RMS | Yes | Yes |
| AC Current | 400A | 400A |
| DC Current | No | 400A |
| AC/DC Voltage | 600V | 600V |
| Resistance | 40 MΩ | 40 MΩ |
| Capacitance | Yes | Yes |
| Temperature Measurement | No | Yes |
| Frequency Measurement | Yes | Yes |
| Non-Contact Voltage (NCV) | Yes | Yes |
| Display Count | 4000 | 6000 |
| Bluetooth Connectivity | No | Yes (Klein Tools App) |
| Safety Rating | CAT III 600V | CAT III 600V |
| Drop Protection | 2 meters (6.6 ft) | 2 meters (6.6 ft) |
| Backlight | Yes | Yes |
| Weight | ~10 oz | ~12 oz |
| 💳 Pricing – Check Price | 💲 Check Price CL320 | 💲 Check Price CL445 |
⚙️ Performance and Functionality
The CL320 provides accurate True RMS readings for AC current and voltage, ensuring dependable performance on both linear and non-linear loads. It’s an excellent tool for diagnosing wiring, outlets, and breaker panels, offering fast response times and clear display readouts.
The CL445 adds more flexibility, capable of measuring both AC and DC current, along with temperature readings using the included thermocouple probe. The built-in Bluetooth function allows real-time data logging and remote viewing via the Klein Tools App, enhancing workflow efficiency.
Professionals who manage HVAC systems, solar power, or battery-based installations will appreciate the CL445’s added versatility and modern app integration.
🧰 Build and Design
Both meters follow Klein’s proven rugged design philosophy, featuring durable housings, tactile rotary selectors, and ergonomic grips for one-handed use. The CL445’s slightly larger form factor accommodates its expanded measurement circuitry and Bluetooth module, but both models remain lightweight and portable.
Their 2-meter drop protection and solid safety ratings make them reliable companions on tough job sites.
⚡ Safety and Durability
Both the CL320 and CL445 carry CAT III 600V safety ratings, providing strong protection for residential and commercial electrical work. Each includes non-contact voltage detection (NCV) for quick live wire identification and True RMS accuracy to ensure consistent readings across varying loads.
The CL445’s DC measurement capability and temperature probe add another layer of professional reliability for complex systems, while maintaining the same safety certifications as its simpler counterpart.
💡 Ease of Use and Features
The CL320 is designed for simplicity; ideal for users who want an efficient, no-frills clamp meter with core measurement functions. It includes a backlit display, data hold, and auto power-off.
The CL445, while more advanced, maintains an intuitive layout. Its Bluetooth connectivity allows users to store measurements and view data remotely — especially useful when monitoring circuits over time or working in confined areas.
🧩 Ideal Use Cases
| User Type | Recommended Model | Why |
|---|---|---|
| Homeowners & DIY Electricians | CL320 | Reliable and affordable for general electrical testing |
| Residential Electricians | CL320 | Compact and accurate for standard AC diagnostics |
| HVAC Technicians | CL445 | Includes temperature and DC current functions |
| Solar & Automotive Technicians | CL445 | Handles both AC and DC circuits effectively |
| Data-Driven Professionals | CL445 | Bluetooth integration with the Klein Tools App |
🏁 Verdict
Both the Klein CL320 and CL445 are capable, rugged clamp meters from a trusted name in electrical tools.
Choose the CL320 if you need a dependable, straightforward True RMS clamp meter for residential or light commercial work. It’s the perfect blend of accuracy, simplicity, and affordability.
👉 Buy the Klein CL320 on Amazon
Choose the CL445 if you want an upgraded meter with DC measurement, temperature testing, and smart Bluetooth connectivity for real-time data tracking. Its added versatility makes it ideal for professionals who want both precision and modern functionality.
👉 Buy the Klein CL445 on Amazon
In short, the CL320 is the practical everyday workhorse, while the CL445 is the tech-savvy professional’s tool built for the future.
