GOM-804 & GOM-805 DC Milli-Ohm Meter
  • 50,000 counts
  • 3.5” (320 x 240) TFT LCD display
  • High accuracy of 0.05% precision
  • 1Amp test current, 0.1µΩ resolution
  • Fast measurement of 60 readings per second
  • Four wire resistance measurement
  • Temperature compensation measurement function
  • Delayed measurement
  • 20 sets of panel setting memory
  • Dry circuit (GOM-805 only)
  • Drive modes (GOM-805) : DC+/DC-, Pulsed, PWM, Zero, Standby
  • Drive modes (GOM-804) : DC+, Standby
  • Interface: USB device, RS-232C, Handler/Scan/EXT I/O, and GPIB (option)


User Manual (e-book version)


GOM-804/805 feature 3.5-inch TFT display, maximum 50,000 counts measurement display, the rapid sampling rate of 60 readings per second, optimum 0.05% measurement precision, four wire measurement method as well as the temperature measurement and temperature compensation measurement function to meet the requirement of low resistance measurement application. The GOM-805 also includes various drive modes and Dry circuit for contact resistance measurement applications. More features, including 20 sets of panel setting memory and many external control interface such as RS-232C, USB, Handler/Scan/EXT IO or GPIB (option), greatly elevate GOM-804/805 milliohm meter’s convenience on practical applications.

GOM-804/805 adopt 3.5-inch color LCD to enhance the clarity of measurement results and to provide display for related setting criteria that tremendously brings up the completeness of test information. Additionally, GOM-804/805, with the optimum 0.05% precision, augment the measurement speed to 60 sampling rate per second and maintain the display digits of five instead of four despite of different speed selections. Furthermore, the independent functionality keys and direction keys together increase the operational convenience which allows users to complete their measurement tasks with intuitive convenience and speed.
GOM-805 provides Dry circuit and various drive modes (DC+, DC-, Pulsed, PWM) for measurement applications on different materials. The pulsed current output mode is suitable for interacting conductors of different materials and this output mode is to reduce the thermal EMF influence, which is caused by electric potential difference generated from different conductors acting on different temperatures while conducting low resistance measurements. The DC+ and DC- output modes are best for the measurement requirements of inductive components. The PWM output mode, ideal for changing temperature sensitive materials, can avoid resistance value variation which is due to over load happened on current measurement for a long period of time. During the DC+, DC- and Pulsed drive is supplied; the Dry circuit can work with them also. Dry circuit can limit the applied voltage under the open circuit voltage of 20mV to avoid over voltage occurred on the both ends of components. The over voltage will damage the oxide coating and the thin layer of contact surface, as a result, the validity of measurement will then be ruined. For instance, contact resistance of connector measurement is one of the applications.
With respect to connecting the external control, GOM-804/805 provide a D-sub 25-pin combined interface to execute, according to the functionalities, Handler, Scan or EXT IO for respectively connecting to a sorting machine; connecting to an external on-off switch, and directly conducting external trigger control. For remote control and measurement result retrieval requirements, GOM-804/805 also provide various interface selections such as RS-232C, USB, and GPIB (GOM-804(option)/GOM-805(standard) interface. Furthermore, the control commands are compatible to that of GOM-802 that saves time in adjusting programs while switching from the old model to the new model.
To sum up, GOM-804 evolves from GOM-802 platform with more advanced functionalities and specifications, including display digits, measurement speed and standard interface (RS-232C/USB). With all the capabilities of GOM-804, GOM-805 augments itself with new measurement abilities (Dry circuit and various drive modes) to meet the requirements of broader low resistance measurement applications.
  • Totally replacing the existing models
  • Faster measurement without sacrificing resolution
  • Dry circuit test for GOM-805 only
  • Various drive modes for GOM-805 only
  • Standard interface for control and communications
  • Command compatibility

Included Accessories

Quick Start Guide x 1, Power cord x 1, Test lead GTL-308 x 1, CD x1(complete user manual)



GOM-80G1  GPIB card
(only for GOM-804 and must be installed at factory before shipment.)


Optional Accessories

PT-100    Platinum Temperature Probe
GTL-232  RS-232C Cable 9-pin, F-F type, null modem for computer, Approx. 2000mm
GTL-246  USB Cable, A-B type, Approx. 1200mm
GTL-248  GPIB Cable, Approx. 2000mm
GTL-309  Test Lead, Approx. 3000mm

GOM-805 D.C. Milli-Ohm meter with Handler / RS-232C / USB Device / GPIB
GOM-805 D.C. Milli-Ohm meter with Handler / RS-232C / USB Device / GPIB$945 Where to buy
GOM-804 with GPIB D.C. Milli-Ohm meter with Handler / RS-232C / USB Device / opt.01 GPIB)
GOM-804 with GPIB D.C. Milli-Ohm meter with Handler / RS-232C / USB Device / opt.01 GPIB)$764 Where to buy
GOM-804 D.C. Milli-ohm meter with Handler / RS-232C / USB Device
GOM-804 D.C. Milli-ohm meter with Handler / RS-232C / USB Device$573 Where to buy
Test Solution for the Battery Industry
Solutions version., 【Member Only】 7.09 MB DOWNLOAD
2D Drawing
GOM-804 & 805 2D DIME.
2D Drawing version., 【Member Only】 219 kB DOWNLOAD
3D Model
GOM-804 & 805 3D DIME.
3D Model version., 【Member Only】 1.83 MB DOWNLOAD
Firmware Upgrade Guide
The Firmware Upgrade Guide of GOM-804 & GOM-805.
Firmware Upgrade Guide versionE6.,EN 【Member Only】 1.08 MB DOWNLOAD
DFU Driver (for 64 bit system)
The firmware upgrade driver of GOM-804 & GOM-805
DFU Driver (for 64 bit system) version., 【Member Only】 9.30 MB DOWNLOAD
DFU Driver (for 32 bit system)
The firmware upgrade driver of GOM-804 & GOM-805
DFU Driver (for 32 bit system) version., 【Member Only】 9.35 MB DOWNLOAD
Firmware Upgrade Program
The firmware Upgrade Program of GOM-804 & GOM-805.
Firmware Upgrade Program version., 【Member Only】 5.74 MB DOWNLOAD
The brochure of GOM-804/805.
Brochure version.,EN 1.83 MB DOWNLOAD
User Manual
The user manual of GOM-804/805.
User Manual versionE20220331.,EN 3.06 MB DOWNLOAD
LabVIEW Driver
GOM-80X LabVIEW Driver (for LabVIEW 2010 or later)
LabVIEW Driver version1.,EN 472.8 KB DOWNLOAD
LabVIEW Driver
GOM-80X LabVIEW Driver (for LabVIEW 2012 or later)
LabVIEW Driver version1.,EN 519.0 KB DOWNLOAD
LabVIEW Driver
GOM-80X LabVIEW Driver (for LabVIEW 2014 or later)
LabVIEW Driver version1.,EN 626.2 KB DOWNLOAD
USB Driver
The USB Driver of GOM-804/805.
USB Driver version1.,EN 618.4 KB DOWNLOAD
GOM-804 & GOM-805 Newest firmware file.
Firmware versionM3.08 / S3.04., 【Member Only】 109 kB DOWNLOAD