Honeytek HK78B PRO – 4,000 Counts TRMS Manual Range Digital Multimeter
Product Description
The Honeytek HK78B PRO is a premium 4,000-count true RMS manual range digital multimeter with enhanced features for more demanding professional applications. While it shares the same core electrical measurement capabilities as the HK78A PRO, the HK78B PRO stands out with its expanded temperature measurement range. This makes it an ideal tool for technicians working with heating systems, engines, and other applications where a broad temperature range is required. Its combination of accuracy, safety features like NCV, and extra functionality make it a versatile and powerful diagnostic instrument.
Highlights
4,000 counts display for high-resolution measurements.
True RMS for accurate AC signal analysis.
Extended temperature range from -20°C to 1000°C (-4°F to 1832°F).
Non-Contact Voltage (NCV) and live wire recognition for safety.
Flashlight and LCD backlight for ease of use in dark spaces.
Data hold and relative mode to simplify complex readings.
CAT III 1000V safety certified.
Specifications
| Function | Range | Accuracy |
| DC Voltage | 400m/4/40/400V, 750V | ±(0.5%+2d) to ±(0.8%+3d) |
| AC Voltage | 400m/4/40/400V, 750V | ±(0.8%+3d) |
| DC Current | 40m/400mA, 20A | ±(1.0%+5d) |
| AC Current | 40m/400mA, 20A | ±(1.5%+5d) to ±(1.0%+10d) |
| Resistance | 400/4k/40k/400k/4MΩ, 40MΩ | ±(1.0%+5d) |
| Capacitance | 10nF, 100n/1u/10u/100uF, 1m/40mF | ±(4.0%+25d) to ±(5.0%+5d) |
| Frequency | 1/10/100/1kHz | ±(0.1%+2d) |
| Temperature (°C) | -20°C-1000°C | ±(2.0%+3d) |
| Temperature (°F) | 0°F-1832°F | ±(2.0%+3d) |
| Display Count | 3999 | |
| True RMS |  | |
| Safety Rating | CAT III 1000V | |
| Size / Weight | 185 × 88 × 54 mm / 355g |
HVAC system diagnostics and temperature monitoring.
Industrial process control and temperature-sensitive equipment testing.
Automotive engine diagnostics and temperature analysis.
Professional use in demanding environments where a wide temperature range is crucial.
Comparison – HK78A PRO vs HK78B PRO
| Feature | HK78A PRO | HK78B PRO |
| Display Count | 3999 | 3999 |
| True RMS | | |
| DC Voltage Range | Up to 750V | Up to 750V |
| AC Voltage Range | Up to 750V | Up to 750V |
| Resistance Range | Up to 40MΩ | Up to 40MΩ |
| Temperature (°C) |  | -20°C-1000°C |
| Temperature (°F) | | 0°F-1832°F |
| Transistor hFE Test | | |
| Continuity Buzzer | | |
| Diode Test | | |
| Flashlight | | |
| NCV | | |
| LCD Backlight | | |
| Data Hold | | |
| Relative Mode | | |
| CAT Rating | CAT III 1000V | CAT III 1000V |
| Best For | General professional use and electronics repair, including hFE testing. | Professionals in HVAC, industrial, or automotive fields who require a broad temperature measurement range. |
