Hioki DT4281 Digital Multimeter
The Hioki DT4281 is a high-precision, professional-grade digital multimeter with a 60,000-count, 5-digit display offering superior accuracy and broad frequency response. It’s designed for demanding environments and complex electrical measurements, featuring True RMS, safety shutters, clamp-sensor input option (instead of a 10 A terminal), and functions such as low-pass filtering to handle distortion and harmonics.
Description
The DT4281 stands at the top-tier of Hioki’s multimeter lineup, built for tasks where precision, safety, and flexibility are essential. It offers DC voltage measurement from low millivolt levels up to 1000 V with excellent basic accuracy. AC voltage is also measured across a similar span, with bandwidth up to 100 kHz so it can faithfully capture not just the fundamental component but higher-frequency components.
To manage measurement distortion (such as from inverter output or switching power supplies), it includes a low-pass filter to isolate the fundamental waveform. Current measurements are done via optional clamp probes rather than a conventional 10 A terminal, enhancing safety. The unit offers multiple other measurement functions—resistance, capacitance, frequency, DC+AC voltage, temperature (with thermocouple), diode test, continuity, etc.
Design-wise, it’s rugged: safety category ratings make it usable in high-risk electrical environments. The unit has input terminal shutters to prevent mis-insertion of test leads, backlight display (with warning coloring at high voltages), internal memory to store readings, and optional USB/communication interface to send data to a PC. Operating temperature, durability, and handling features suit field and lab use alike; the rugged build includes drop‐resistance and design features to maintain accuracy under adverse conditions.
Features
- True RMS measurements for both voltage and current to handle non-sine or distorted waveforms accurately.
- 60,000-count (5-digit) high-resolution display.
- Excellent DC voltage accuracy (in the order of 0.025%) and wide AC voltage frequency response (up to 100 kHz).
- Low-pass filter available to remove harmonic components, useful when measuring inverter or PWM outputs.
- Optional clamp probe input for high current measurements, reducing risk compared to a fixed high-current terminal.
- Safety features including terminal shutters to avoid mistaken lead insertion, and a backlight that helps indicate dangerous input voltage.
- Internal memory capable of storing ~400 data sets for ease of repeated measurement work.
- Multiple measurement functions: resistance, capacitance, frequency, diode test, continuity, DC+AC voltage, temperature with thermocouples.
- USB or communication package option to transfer data and log measured values in real time.
- Rugged design, safety ratings appropriate for high risk environments, operating temperature range suitable for field and lab use.
Includes
- Test Lead L9207-10(*2) × 1
- Instruction Manual × 1
- LR6 Alkaline Battery × 4
