The UNI-T UT33B+ Digital Multimeter is a reimagined classic, offering professional-grade measurement features in a rugged, palm-sized body. At Electrapac, we recommend the UT33B+ specifically for automotive technicians and hobbyists because it includes a dedicated Battery Test Function, which measures batteries under a realistic load to give a more accurate health reading than standard voltage checks.

Product Overview

The UT33B+ is part of UNI-T’s new generation of entry-level multimeters. It is designed to survive drops of up to 2 meters and features a large, clear LCD with a bright backlight for working in dark engine bays or electrical cabinets. Its ergonomic "palm-size" design makes it comfortable for one-handed operation while providing the safety of a CAT II 600V rating.

Key Features for Electrapac Customers

• Advanced Battery Testing: Unlike basic meters that only check "Open Circuit Voltage," the UT33B+ applies a small internal load during testing. This reveals if a battery is truly "weak" or "dead" even if it shows a surface charge of 12V.

• Loud Continuity Buzzer: Features a high-decibel buzzer for fast "eyes-free" wiring checks. If a circuit is complete, the meter provides an instant, clear audible signal.

• Backlit LCD Display: The upgraded display features high contrast and a manual backlight button, ensuring you can read your data in any lighting condition.

• Rugged Protective Shell: The integrated rubber holster provides excellent grip and impact protection, protecting the internal circuitry from accidental drops on the workshop floor.

• Precision Probes: Comes with high-quality, flexible test leads that offer low resistance for more accurate measurements.

How to Use the Battery Test Function

To get the most out of your Electrapac multimeter when checking batteries, follow these steps:

1. Set the Dial: Turn the rotary switch to the specific battery range (1.5V, 9V, or 12V).

2. Connect Leads: Place the Red probe on the Positive (+) terminal and the Black probe on the Negative (-) terminal.

3. Read the Value: The meter will display the voltage under load. A healthy 12V lead-acid battery should stay above 11.5V during this test; if it drops significantly, the battery is likely end-of-life.

Primary Applications

• Automotive Repair: Checking car batteries, fuses, and basic sensor voltages.

• Home DIY: Testing household AA/AAA batteries and troubleshooting wall outlets or light switches.

• Electronics Repair: Measuring resistors, diodes, and DC current on PCB assemblies.

• HVAC Maintenance: Checking voltage supply to thermostats and control boards.

• Education: A safe, durable, and affordable tool for students and STEM classrooms.

Why Shop at Electrapac?

We supply the UNI-T UT33B+ with a full factory warranty and a fresh 9V battery included, so you can start troubleshooting right out of the box. Visit us at www.electrapac.com for the reliable diagnostic tools that every toolbox needs.