In the HVAC world, your tools can make or break the job—especially when it comes to diagnostics and electrical testing. A great multimeter needs to be durable, precise, and designed with real-world HVAC demands in mind.
We’ve rounded up the top 5 best multimeters for HVAC techs in 2025, breaking down each one by performance, features, and field-readiness.
Best Multimeters for HVAC Techs 2025
1. Klein CL800 – Best All-Around Clamp Meter
The Klein CL800 is a rugged, feature-packed clamp meter trusted by both field veterans and new techs alike. It measures AC/DC current via clamp, and handles voltage, resistance, capacitance, temperature, and more via test leads.
- True RMS & auto-ranging for accurate readings
- Low-Z mode to detect and eliminate ghost voltage
- Thermocouple support for HVAC temp testing
- Backlit display + built-in work light
- 6.6 ft drop protection + IP40 rating
Best for: HVAC pros who want durability, versatility, and reliable field performance.
2. Klein CL445 – Best Dual Display Value
The CL445 brings excellent HVAC functionality with an intuitive interface and dual backlit LCD for simultaneous readings—ideal when you’re comparing current and voltage at the same time.
- Measures AC inrush, AC/DC voltage, resistance, microamps, and temperature
- Non-contact voltage detection (NCVT) built into the clamp
- Min/Max, data hold, and auto shut-off
- Test lead holder + magnetic hanger compatibility
- True RMS accuracy
Best for: Techs who want visual clarity and solid performance in both residential and light commercial work.
3. UEi DL369 – Best Compact Pro Tool
The UEi DL369 offers a strong feature set in a compact form, with dual display output and the essentials HVAC pros need daily.
- AC current up to 400A, and AC/DC current up to 200A
- Supports capacitance, frequency, duty cycle, resistance
- NCV detection with audio alert
- Auto-ranging, Min/Max recording
- 4,000-count display for precise readings
Best for: Field techs needing a compact but capable tool for everyday HVAC troubleshooting.
4. UEi DL389B – Best for Industrial HVAC Work
The DL389B is an industrial-grade meter designed to handle higher loads and more complex systems.
- Measures AC amps, AC/DC volts, microamps, temperature, continuity, and capacitance
- CAT IV 300V & CAT III 600V safety rated
- Bright dual backlit screen + built-in work light
- Magnetic mount for hands-free use
- True RMS + NCV detection
Best for: Techs working in commercial/industrial environments where ruggedness and accuracy are non-negotiable.
5. Klein CL320KIT – Best Complete HVAC Tool Kit
More than just a meter, the CL320KIT is a full HVAC troubleshooting toolkit. At the center is the CL320 clamp meter with all the expected test modes, including DC microamps for flame sensors and thermocouple support for HVAC temp testing.
Kit includes:
- CL320 Clamp Meter (TRMS, auto-ranging, temperature, NCVT)
- NCVT3P Voltage Tester (12–1,000 VAC, visual + audible alerts)
- IR07 Infrared & Probe Thermometer (range: –40°F to 572°F)
Best for: New techs or service teams needing an all-in-one kit that covers voltage, continuity, temperature, and safety checks.
Final Thoughts
A reliable HVAC multimeter isn’t just a tool—it’s a daily workhorse. Whether you’re reading flame sensors, testing capacitors, or tracking voltage drop under load, accuracy and durability are critical.
Quick Picks:
- Best Overall: Klein CL800
- Best Display/Interface: Klein CL445
- Best Compact Tool: UEi DL369
- Best for Heavy-Duty Work: UEi DL389B
- Best HVAC Starter Kit: Klein CL320KIT
