One Pocket Meter for Electrical and Temperature Diagnostics
The HK39C is an auto-ranging TRMS pocket digital multimeter built for professionals and practical users who want broader diagnostic coverage in a compact tool. In addition to AC and DC voltage, it measures resistance up to 20 MΩ and temperature from -20°C to 1000°C (-4°F to 1832°F). This combination helps technicians investigate both electrical behavior and heat-related operating conditions with one portable meter.
Auto range selection reduces the need to choose measurement ranges manually, making repeated checks faster across service, installation and maintenance tasks. The True RMS function supports AC voltage measurement on common electrical loads, while the 1,999-count display provides straightforward readout of measured values.
The HK39C also integrates NCV detection and live wire recognition for preliminary conductor checks. A continuity buzzer, diode test, LCD backlight, work flashlight and data hold function support efficient troubleshooting in control cabinets, equipment rooms and other confined or poorly illuminated work areas. Despite its expanded functions, the meter measures 119 × 65 × 30 mm and weighs only 130 g.
Key Features
- Automatic ranging: Selects the measurement range automatically for quicker day-to-day testing.
- True RMS capability: Supports practical AC voltage measurement across common electrical equipment.
- Temperature measurement: Covers -20°C to 1000°C and -4°F to 1832°F.
- Resistance up to 20 MΩ: Provides wider resistance coverage for electrical and electronic diagnostics.
- Three DC voltage ranges: Includes 200 mV, 2 V and 200 V ranges, plus 600 V.
- NCV and live wire recognition: Adds convenient preliminary voltage and conductor identification functions.
- 1,999-count display: Gives users a clear digital measurement readout.
- Continuity and diode modes: Supports connection checks and basic electronic troubleshooting.
- Backlight and integrated flashlight: Helps users work in low-light service locations.
- Data hold: Freezes the displayed reading for viewing or documentation.
- 1.5 V / 9 V battery test: Provides a dedicated check for common battery types.
- Auto power-off: Reduces unnecessary battery consumption.
- CAT III 600V rated: Designed for work that remains within the stated measurement category and voltage limit.
Technical Specifications
| Category | Range / Specification | Accuracy / Details |
|---|---|---|
| DC voltage | 200 mV / 2 V / 200 V | ±(0.5% + 3 digits) |
| DC voltage | 600 V | ±(0.8% + 5 digits) |
| AC voltage | 2 V / 20 V / 200 V | ±(1.0% + 3 digits) |
| AC voltage | 600 V | ±(1.2% + 5 digits) |
| Resistance | 200 Ω / 2 kΩ / 20 kΩ / 200 kΩ / 2 MΩ | ±(1.0% + 5 digits) |
| Resistance | 20 MΩ | ±(1.2% + 8 digits) |
| Temperature | -20°C to 0°C | ±4°C |
| Temperature | 0°C to 400°C | ±(2.0% + 3 digits) |
| Temperature | 400°C to 1000°C | ±(3.0% + 3 digits) |
| Temperature | -4°F to 50°F | ±5°F |
| Temperature | 50°F to 750°F | ±(2.0% + 5 digits) |
| Temperature | 750°F to 1832°F | ±(3.0% + 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 | Yes | — |
| LCD backlight | Yes | — |
| Data hold | Yes | — |
| Battery test | 1.5 V / 9 V | — |
| Auto power-off | Yes | — |
| Range selection | Auto | — |
| 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. Confirm probe compatibility, temperature-sensor requirements, operating conditions and complete safety instructions in the product manual.
Typical Applications
HVAC and Thermal Troubleshooting
Compare temperature and electrical readings when checking heating equipment, ventilation systems, thermostats and temperature-related faults.
Electrical Installation and Maintenance
Use auto ranging for efficient voltage, resistance and continuity checks during installation, preventive maintenance and service work.
Control Panels and Facility Equipment
Inspect supply voltage, locate possible live conductors and check circuits in cabinets or utility areas with help from NCV, live wire recognition, a backlit display and flashlight.
Appliance and Electromechanical Service
Evaluate voltage, resistance, continuity and operating temperature when diagnosing appliances, motors and other powered equipment.
Electronics, Wiring and Component Checks
Use the extended resistance ranges, diode mode and continuity buzzer for cable inspection, circuit troubleshooting and basic component checks.
HK39C or HK39A?
Choose the HK39C when automatic ranging, temperature measurement, live wire recognition and resistance measurement up to 20 MΩ are important to your workflow. For essential measurements with direct manual range control, see the HK39A manual-ranging TRMS pocket digital multimeter.
Request HK39C Product Information
Contact us for pricing, lead times, packaging information, OEM requirements and the complete HK39C technical documentation.
