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HT Instruments HT401

HT Instruments HT401

Digital Professional AC+DC TRMS multimeter

The HT Instruments HT401 is one of our Factory-New Digital Professional AC+DC TRMS multimeters.

Price: $295.00


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HT Instruments HT401 Features:

  • DC Voltage
  • AC and AC+DC TRMS Voltage
  • DC Current
  • AC and AC+DC TRMS Current
  • AC/DC voltage with low input impedance (Auto-V)
  • “Voltsense” for AC voltage detection without contact
  • Resistance
  • Continuity test
  • Diode test
  • Capacitance
  • Frequency
  • Temperature with type K probes
  • Data HOLD
  • Manual/Autorange
  • Bargraph
  • Backlight
  • Fuse protection on inputs
  • Alarm indication to avoid wrong connections
  • Auto Power OFF
  • Standard Accessories:
  • 4413-2: Couple of test leads
  • TK101: Type K bead probe
  • Alligator clip black, 4 pcs
  • Protection rubber holster
  • Battery
  • User manual


  • TK107: Type K probe for air/gas temperature
  • TK108: Type K probe for semi-solid substances temperature
  • TK109: Type K probe for liquid temperature
  • TK110: Type K probe for surface temperature
  • TK111: Type K probe for surface temp. with 90 degree tip


  • EMC 2004/108/CE Directive
  • LVD 2006/95/CE Directive

The HT401 is a TRMS digital multimeter designed to perform basically AC/DC voltage measurements up to 1000V, AC/DC current measurement up to 10A more than resistance, continuity test, diode test, frequency, capacitance, and temperature with type K probes as sub-features. Some relevant features are also the AC+DC mode which can be used to consider the DC components overlapped to a generic alternate signal and the AC/DC voltage measurement with low input impedance in way to reduce the capacitive influence of adjacent conductors during a voltage test.

The meter is designed in compliance with IEC/EN 61010-1 safety standard with double insulation protection in CAT IV 600V and CAT III 1000V. HT401 have a LCD display with bargraph and each measurement function can be selected with a rotate selector which permits also to avoid wrong connections. Other features are HOLD function, MAX/MIN/PEAK functions and Auto Power OFF feature is integrated to preserve the internal battery after 20 minutes of idleness.