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DIGITAL MULTIMETER DT4281

World's Premier Digital Multimeter. Superior Accuracy and High Response, Topped with Safety Terminal Shutters

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The Hioki DT4200 Digital Multimeter Series consist of a complete lineup of 9 models ranging from professional to industrial to pocket meters. The DT4281 is our top-of-the-line high-precision 60000 count digital multimeter with all of the functions and features required for advanced testing in complex power and electrical applications.

CAT IV 600 V, CAT III 1000 V

How to use digital multimeters

This video introduces how to use the DT4280 series of digital multimeters as well as some of the instrument’s featured functionality. Hioki multimeters are engineered to help professional electricians do their jobs safely and quickly.

Key Features

  • 60000 count, 5-digit display, high-resolution measurements
  • ±0.025% DC V basic accuracy, wide 20 Hz to 100 kHz AC V frequency characteristics
  • Low-pass filter cuts high harmonics (when measuring inverter fundamental waveforms)
  • Measures large currents with optional clamp probe (only for DT4281, which has no 10 A terminal for accident prevention)
  • Terminal shutter mechanism (prevents erroneous test lead insertion)
  • Dual display lets you check voltage and frequency simultaneously

Model No. (Order Code)

DT4281 Direct and current clamp input terminals

The ultimate digital multimeter, featuring a design focused on safety that’s critical for electrical work

The DT4281, which is part of Hioki’s DT4280 series of high-end digital multimeters, is designed for maximum safety in electrical work. Connect an AC clamp to safely measure current.

- DC current measurement　600.00μA / 6000.0μA / 60.000mA / 600.00mA
- AC current measurement　600.00μA / 6000.0μA / 60.000mA / 600.00mA
- Directly connect an AC clamp sensor

Accurately measure the voltage output from the secondary sides of inverters by eliminating harmonic components

Measure the fundamental wave alone by eliminating harmonic components with the DT4281’s low-pass filter function.

Measure the ripple voltage of DC charging systems

Measure ripple voltage with a superposed DC signal by using peak value measurement and DC + AC voltage measurement.

Percentage display for 4 to 20 mA instrumentation signals

The digital multimeter can convert and display instrumentation signals of 4 to 20 mA or 0 to 20 mA representing properties such as temperature, pressure, and flow rate from a transducer or other device that converts sensor data into an electrical signal.

600.00 μA range for measuring very low currents used by gas-burning devices

Accurately measure the very low currents such as burner flame currents.

Clamp-on sensor based current measurement eliminates the cause of accidents

Mistakenly measuring voltage using the current range may lead to a short-circuit. The DT4281 eliminates the root cause of such accidents by providing clamp-on sensor based current measurement functionality instead of using conventional probes.

True RMS measurement for accurate measurement of even distorted current waveforms

Digital multimeters implement two types of measurement: mean-value measurement and true RMS measurement. The two methods yield significantly different measurement results for current waveforms, which are often distorted. For accurate measurement, it is necessary to use an instrument with true RMS capability.

Measurement data can be downloaded to, reviewed on, and saved to a computer.

Connect the DT4281 to a PC with the optional Communication Package DT4900-01 to easily graph data stored in the DMM’s internal memory and display measurement results in real time on the computer. Save important measured values in text format.

*The computer and multimeter are electrically isolated by means of optical communications so that data can be sent without concern for electrical hazards.

Designed and manufactured in Japan to ensure high quality and guaranteed with a 3-year warranty for peace of mind

All development, design, and manufacturing processes for almost all Hioki digital multimeters are carried out at our Head Office in Nagano Prefecture. Some of the industry’s most advanced technological capabilities enable us to deliver products of the highest possible quality.

Safe measurement requires use of an instrument that suits the measurement location.

To ensure operators’ ability to use measuring instruments safely, IEC 61010 classifies the locations in which instruments are used into a series of safety-based measurement categories (ranging from CAT II to CAT IV). Using an instrument that does not satisfy the required safety level can lead to an electrical accident.

Basic specifications

Accuracy guaranteed: 1 year
Regarding DMM Accuracy: Due to the many ranges and functions available in a DMM, only the basic accuracy is indicated for reference. Please refer to the brochure for detailed accuracy information.
DC Voltage range 60.000 mV to 1000.0 V, 6 ranges, Basic accuracy: ±0.025 % rdg. ±2 dgt.
AC Voltage* range 60.000 mV to 1000.0 V, 6 ranges, Frequency characteristics: 20 Hz - 100 kHz
Basic accuracy 45 - 65 Hz : ±0.2 % rdg. ±25 dgt. (True RMS, crest factor 3)
DC + AC Voltage* range 6.0000 V to 1000.0 V, 4 ranges, Frequency characteristics: 20 Hz - 100 kHz
Basic accuracy 45 - 65 Hz : ±0.3 % rdg. ±30 dgt. (True RMS, crest factor 3)
Resistance range 60.000 Ω to 600.0 MΩ, 8 ranges, Basic accuracy: ±0.03 % rdg. ±2 dgt.
DC Current range 600.00 μA to 600.00 mA, 4 ranges
Basic accuracy: ±0.05 % rdg. ±5 dgt.
AC Current* range 600.00 μA to 600.00 mA, 4 ranges
Basic accuracy 45 - 65 Hz : ±0.6 % rdg. ±5 dgt. (True RMS, crest factor 3)
Frequency characteristics: 20 Hz - 20 kHz (at 600 μA to 600 mA range)
AC Current* range
(use with Clamp on probes) 		10.00 A to 1000 A, 7 ranges
Add the Clamp on probe accuracy to Basic accuracy 40 - 65 Hz : ±0.6 % rdg. ±2 dgt. (True RMS, crest factor 3)
Peak DC V measurement: Signal width 4 msec or more (single), 1 msec or more (repeated)
AC V, DC/AC A measurement:
Signal width 1 msec or more (single), 250 μsec or more (repeated)
Capacitance range 1.000 nF to 100.0 mF, 9 ranges, Basic accuracy: ±1.0 % rdg. ±5 dgt.
Continuity Check Continuity threshold: 20/50/100/500 Ω, Response time: 10 ms or more
Diode test Open terminal voltage: 4.5 V or less, Testing current 1.2 mA or less, Threshold of forward voltage: 0.15 V to 3 V, seven stages
Frequency range AC V, DC+AC V, AC A measurement, at pulse width 1 μs or more (50 % duty ratio)
99.999 Hz (0.5 Hz or more) to 500.00 kHz, 5 ranges, ±0.005 % rdg. ±3 dgt.
dB conversion Standard impedance setting (dBm), 4 Ω to 1200 Ω, 20 stages
Display dB conversion value of AC voltage (dBV)
Temperature (thermocouples) K: -40.0 °C to 800.0 °C (-40.0 °F to 1472.0 °F)
Add accuracy of the Thermocouple probe to main unit accuracy: ±0.5 % rdg. ±3 °C
Other functions Filter function (remove harmonic noise, use only at 600 V AC, 1000 V AC ranges), display value hold, auto hold, MAX/MIN value display, PEAK value display, relative value display, sampling setting, internal memory (400 data), auto-power save, USB communication (option), mis-insertion prevention shutters, decibel conversion, 4-20 mA percentage conversion
Display Main and sub displays: 5-digits LCD, max. 60000 digits
Display refresh rates 5 times/s (Capacitance measurement: 0.05 to 2 times/s, depending on measured value, Temperature: 1 time/s )
Power supply LR6 (AA) alkaline batteries × 4, Continuous use: 100 hours
Dimensions and mass 93 mm (3.66 in) W × 197 mm (7.76 in) H× 53 mm (2.09 in) D, 650 g (22.9 oz) (with test leads holder and batteries)
Included accessories Test Lead L9207-10 × 1, Instruction Manual × 1, LR6 Alkaline Battery × 4
  • *Zero-suppression: For small inputs below the guarantee range, zero is effectively displayed.

Test leads (3)

L9207-10 is a bundled accessory

TEST LEAD L9207-10

Cable length: 90 cm (2.95 ft.)

TEST LEAD L9300

Cable length 95 cm (37.4 in.), Integrated cap and protective finger guard

DC HIGH VOLTAGE PROBE P2000

Learn more

• Safe inspection of solar installations with high voltage
• Enables high voltage measurement up to CAT Ⅲ 2000 V

Options for Test leads (for the L9207-10, L9300) (2)

Attach L9207-10 with the cap removed.
Slide the guard of L9300 and attach as measurement category II.

SMALL ALLIGATOR CLIP SET L4934

Attaches to the tip of the L4932, L9207-10/DT4911, L9206, CAT III 300 V, CAT II 600 V

CONTACT PIN SET L4933

Attaches to the tip of the Test Lead L9207-10/DT4911, L9206, 60V DC/ 30V AC

Options for Test leads (for the L4930) (9)

EXTENSION CABLE SET L4931

Expands the length of L4930/4940, 1.5 m (4.92 ft) length

BREAKER PIN SET L4939

Attaches to the tip of the L4930/4940, CAT III 600 V

TEST PIN SET L4938

Attaches to the tip of the L4930/4940, CAT III 600 V

BUS BAR CLIP SET L4936

Attaches to the tip of the L4930/4940, CAT III 600 V

MAGNETIC ADAPTER SET L4937

Attaches to the tip of the L4930/4940, CAT III 1000 V

TEST PIN SET L4932

Attaches to the tip of the L4930/4940, CAT IV 600 V, CAT III 1000 V

CONNECTION CABLE SET L4930

1.2 m (3.94 ft) length, CAT IV 600 V, CAT III 1000 V

ALLIGATOR CLIP SET L4935

Attaches to the tip of the L4930/4940, CAT IV 600 V, CAT III 1000 V

GRABBER CLIP L9243

Attaches to the tip of the banana plug cable, Red/Black: 1 each, 185 mm (7.28 in.) length, CAT II 1000 V

Current measurement (4)

Note: Use with the Conversion Adapter 9704 is required for connecting Clamp On Probes to the DT series (DT4281, DT4253, DT4255, DT4256).

CLAMP ON PROBE 9010-50

Learn more

• 40 Hz to 1 kHz, ±2% accuracy
• 10 to 500 A AC
• Max. 650 A rms continuous input
CLAMP ON PROBE 9018-50

Learn more

• 40 Hz to 3 kHz, ±1.5% accuracy
• 10 to 500A AC
• Max. 650 A rms continuous input
CLAMP ON PROBE 9132-50

Learn more

• 40 Hz to 1 kHz, ±3% accuracy
• 20 to 1000A AC
CONVERSION ADAPTER 9704

Receiving side BNC (female), output banana (male) *Not compatible with older generation Memory Hicorders with banana input terminals

Temperature measurement (1)

THERMOCOUPLES(K) DT4910

K type, tip exposed, 0.5 mm (0.02 inch) diameter, 80 cm (2.62 ft) length, -40°C to 260°C (-40°F to 500°F), tolerance ±2.5 °C

Other options (4)

CARRYING CASE C0202

COMMUNICATION PACKAGE (USB) DT4900-01

Compatible to Windows 10

MAGNETIC STRAP Z5020

Extra strength

CARRYING CASE C0207

Bag type

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