Uni-T UT39C Digital Multimeter — a reliable, manual-ranging meter for HVAC and refrigeration techs who need AC/DC volts and amps, resistance, temperature and frequency in one tough unit. It’s a bloody good everyday meter for installs, diagnostics and apprentice kits — too easy.

Key Features & Trade Benefits

• CAT I 1000V / CAT II 600V — suitable for general appliance and low-energy circuits; know your category before cracking open a board.
• AC/DC volts to 750V/1000V — covers common mains and control checks on split systems and light commercial gear.
• AC/DC current to 20A — quick compressor/fan draw checks when a clamp’s not handy (observe time limits).
• K-type temperature (−40~1000 °C) — verify discharge air, line temps and defrost — fewer call-backs.
• Frequency, capacitance, diode & continuity — one meter for most service tasks; data hold and auto power-off save time and batteries.
• 1999-count LCD + holster — clear readout with basic drop protection for jobsite knocks.

Why This Product Matters

On a steamy Gold Coast rooftop, a tech swapped to the UT39C to chase a no-cool fault. Quick voltage, continuity and temp checks later, the culprit was a bad cap — job done and the café reopened before lunch. For more meters, see our Multimeters category. Fair dinkum handy.

Pro Tip

Before measuring current, double-check your lead placement and range, and stick to the meter’s time limits on the 20A jack. For mains switchboards or 3-phase distribution, step up to a CAT III/IV meter like the UT17B PRO — she’ll be right.

Compatibility & System Info

• Measurement ranges: DC V 200 mV–1000 V; AC V 2–750 V; DC/AC A 2 mA–20 A; Ω to 20 MΩ; °C −40~1000; Hz 2–20 kHz.
• Safety: CAT I 1000 V / CAT II 600 V (not for CAT III switchboards). Always follow Australian electrical safety guidance.
• Typical jobs: Sydney split installs, Brisbane refrigeration service, controls testing and training vans — no worries.

What’s Included

• UT39C meter with rubber holster
• Test leads + 9V battery
• Point-contact K-type temperature probe
• English manual
• 12-month warranty

Inclusions per HVAC Shop product listing.

Specifications

Specifications verified against Uni-Trend documentation.

Warranty & Returns

Backed by a 12-month warranty. For change-of-mind or faulty returns, see Shipping & Returns. Always use meters in line with Australian electrical safety guidance.

FAQs

Related Products

• Want CAT III/IV safety and True RMS? Step up to the Uni-T UT17B PRO for mains work and noisy signals.
• Prefer a clamp for current? The Fieldpiece SC440 clamp meter adds safe current measurement and HVAC functions.
• Need spare probes? Grab Uni-T UT-L20 probes to keep your kit ready.