Compact True RMS Measurement for Essential Electrical Checks
The HK39A is a compact TRMS pocket digital multimeter designed for technicians, installers, maintenance teams and DIY users who need dependable everyday measurements without carrying a full-size instrument. It measures AC voltage, DC voltage and resistance, while its True RMS function supports more meaningful AC readings when working with common electrical and electronic equipment.
A 1,999-count display, built-in flashlight and LCD backlight help keep readings visible in cabinets, utility spaces and other poorly lit locations. For faster preliminary checks, non-contact voltage detection (NCV) can indicate the presence of an electric field before direct measurement. Continuity buzzer, diode test, data hold and automatic power-off bring the functions most frequently needed for routine troubleshooting into a slim, 130 g meter.
The HK39A uses manual range selection, giving the operator direct control over the measurement range. Its CAT III 600V rating makes it a practical pocket instrument for appropriately rated distribution-level environments when used in accordance with the product manual and applicable safety procedures.
Key Features
- True RMS AC measurement: Designed to provide useful voltage readings across common electrical loads.
- Pocket-size housing: Measures only 119 × 65 × 30 mm and weighs 130 g for easy transport and storage.
- Manual range control: Lets experienced users select the required range directly.
- 1,999-count digital display: Presents measurements in a clear, easy-to-read format.
- NCV detection: Supports quick, non-contact checks for the presence of voltage.
- Continuity and diode testing: Helps identify open circuits, connections and basic semiconductor conditions.
- LCD backlight and flashlight: Improves visibility at panels, inside cabinets and in dim work areas.
- Data hold: Keeps the current value on screen for convenient recording.
- Battery test function: Supports 1.5 V and 9 V battery checks.
- Automatic power-off: Helps preserve the two AAA batteries during daily field use.
- CAT III 600V rated: Intended for use within the meter’s stated category and voltage limits.
Technical Specifications
| Category | Range / Specification | Accuracy / Details |
|---|---|---|
| DC voltage | 600 V | ±(0.8% + 5 digits) |
| AC voltage | 600 V | ±(1.2% + 5 digits) |
| Resistance | 2 kΩ | ±(1.0% + 5 digits) |
| True RMS | Yes | — |
| Display count | 1,999 | — |
| Diode test | Yes | — |
| Continuity buzzer | Yes | — |
| Flashlight | Yes | — |
| Non-contact voltage detection (NCV) | Yes | — |
| Live wire recognition | No | — |
| LCD backlight | Yes | — |
| Data hold | Yes | — |
| Battery test | 1.5 V / 9 V | — |
| Auto power-off | Yes | — |
| Range selection | Manual | — |
| Safety category | CAT III 600 V | — |
| Battery | 2 × 1.5 V AAA | — |
| Product size | 119 × 65 × 30 mm | — |
| Product weight | 130 g | — |
| Carton size | 47 × 31.5 × 34.7 cm | — |
| Quantity per carton | 60 pcs | — |
| Net / gross weight | 17.5 / 18.5 kg | Per carton |
Accuracy is stated in the form shown in the supplied product specification. Operating conditions and complete safety instructions should be confirmed in the product manual.
Typical Applications
Residential Electrical Maintenance
Check outlet voltage, inspect basic wiring continuity and perform preliminary NCV scans during household electrical maintenance.
Appliance and Equipment Troubleshooting
Measure supply voltage, test fuses and check circuit resistance when diagnosing small appliances and general electrical equipment.
Installation and Field Service
Carry the 130 g meter in a tool pouch for routine checks during equipment installation, inspection and service calls.
Electronics and DIY Projects
Use resistance, diode and continuity functions for basic circuit assembly, cable checks and component-level troubleshooting.
Battery Condition Checks
Use the dedicated 1.5 V / 9 V battery test function for common household and portable-device batteries.
Choose the Right HK39 Model
The HK39A is a strong choice for users who prefer manual range selection and need essential voltage, resistance, continuity, diode and NCV functions in a compact format. If your work requires automatic ranging, wider resistance coverage, temperature measurement or live wire recognition, explore the HK39C auto-ranging TRMS pocket digital multimeter.
If battery condition is your primary concern, compare the HK39B dedicated 2,000-count battery tester, which provides battery-specific test loads and minimum good-indication voltages for supported 1.5 V to 22.5 V batteries.
Request HK39A Product Information
Contact us for current availability, quotations, packaging details, OEM options and the complete HK39A user documentation.
