Description
Digital Multimeter DT4281 for Professional Electrical Testing
The Digital Multimeter DT4281 represents the highest level of performance in Hioki’s DT4200 series, designed for professionals who demand accuracy, speed, and uncompromising safety. With a high resolution 60000 count display and advanced signal processing, this multimeter excels in demanding electrical maintenance, industrial diagnostics, and power system analysis.
Accuracy and Measurement Capability
At the core of the Digital Multimeter DT4281 is its exceptional measurement accuracy. With a basic DC voltage accuracy of ±0.025 percent, it provides confidence when working on sensitive circuits and high precision equipment. The wide AC voltage frequency response from 20 Hz to 100 kHz allows reliable measurement of both commercial power and high frequency inverter outputs.
True RMS measurement ensures accurate readings even when waveforms are distorted by harmonics, making the DT4281 suitable for modern electrical systems that rely heavily on switching power supplies and variable frequency drives.
Safety Focused Design
Safety is a defining feature of the Digital Multimeter DT4281. The instrument is rated CAT IV 600 V and CAT III 1000 V, allowing safe use at service entrances and industrial distribution points. A built in terminal shutter mechanism physically blocks incorrect test lead insertion, reducing the risk of short circuits and operator error.
Instead of traditional current terminals, the DT4281 supports clamp sensor based current measurement. This design eliminates one of the most common causes of electrical accidents by preventing accidental voltage measurement while in a current range.
Advanced Measurement Functions
The Digital Multimeter DT4281 includes a low pass filter that removes high frequency harmonic components, enabling accurate measurement of inverter fundamental waveforms. It also supports ripple voltage measurement on DC charging systems, allowing users to evaluate power quality by separating AC ripple from DC signals.
For instrumentation applications, the DT4281 converts and displays 4 to 20 mA and 0 to 20 mA signals as percentages, simplifying sensor and process control diagnostics. The dedicated 600 microampere range ensures accurate measurement of extremely low currents, such as burner flame currents in gas appliances.
Connectivity and Build Quality
With the optional communication package, measurement data can be transferred to a computer for real time monitoring, graphing, and data storage. Optical isolation ensures safe data communication without electrical risk. Designed and manufactured in Japan, the DT4281 reflects Hioki’s commitment to quality and long term reliability, backed by a 3 year warranty.
Specifications Table
| Specification | Details |
| Product Name | Digital Multimeter DT4281 |
| Display Resolution | 60000 counts |
| DC Voltage Accuracy | ±0.025 percent |
| AC Voltage Frequency Range | 20 Hz to 100 kHz |
| Measurement Type | True RMS |
| Current Measurement | Clamp sensor based |
| Low Pass Filter | Yes |
| Dual Display | Voltage and frequency |
| Safety Rating | CAT IV 600 V, CAT III 1000 V |
| Terminal Safety | Integrated shutter mechanism |
| DC Current Ranges | 600 μA to 600 mA |
| AC Current Ranges | 600 μA to 600 mA |
| Instrumentation Signals | 4 to 20 mA and 0 to 20 mA percentage display |
| Data Communication | Optional optical interface |
| Country of Manufacture | Japan |
| Warranty | 3 years |
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