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Rapid 6.4ms Super Megohm and Low Current Testing

Model No. (Order Code)

SM7120 1 ch, 2000 V

Note: Measurement leads are not included. Purchase the appropriate lead option for your application separately.

USB 2.0



The Hioki SM Series Super Megohm Meters are high resistance and ultra low current inspection devices with a 0.1 fA resolution to offer precise testing on production lines.  To accommodate vehicle components with increasingly high breakdown voltages, the SM7120 is the first insulation tester in the world to be able to output a measurement voltage of 2000 V.

• 300 times better noise resistance
• Max. 2000 V output : SM7120
• Max. 2 × 10^19 Ω display
• Min. 0.1 fA resolution
• Built-in EXT I/O, RS-232C, GP-IB and USB



Flexible, Multipurpose Design SUPER MEGOHM METER

Flexible, Multipurpose Design
>IR Meter
What do you need?



2000V / 2*10^19 Ω Display

Perfect for EVs and other high-voltage applications
Improved high voltage resistance and isolation performance in components are essential to meet the demands for high efficiency in recent years for applications such as automotive parts and wearable devices.



1/60 Variability, 300x Noise Resistance

Stability (repeatability) against power supply noise and external noise has improved dramatically due to a combination of new Super Megohm floating circuitry and triaxial connectors.
Variability in normal usage environments is reduced to 1/60 compared to previous models, and to 1/300* in conditions where 50 V noise is applied.



Min. 6.4 ms High-Speed Inspection

6.4 ms = 4.1 ms measurement + 2.3 ms contact check
Achieve high-speed measurement with an inspection time (from TRIG input to INDEX output) of 6.4 ms when contact checks that are essential for mass production inspections are included, and 7.0 ms when comparator measurement is included.



High-Performance Contact Checks

[Low capacity contact checks]
The SM7110/SM7120 is equipped with contact checks that can identify low-capacity capacitors of only a few pF as well as measured objects with a small capacitance.
(Reference value: 0.1 pF to 99.99 pF)

[2-band selection]
As with battery production lines, select the frequency for contact checks to prevent the minute check signals on site with multiple various measuring instruments from getting crossed.
These two contact checks can also be used in picoammeter mode with an external power supply. These are high-performance contact checks that prevent unnecessary retries and excess detection due to the effects of an external power supply, and that also prevent takt reduction and worsening yield ratio.



Electrodes for a Variety of Materials and Uses

For Electronic Components
For Liquid
For Carpeting
For Processed rubber
and all.



Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Number of channels 1 ch
DC current measurement 20 pA range (0.1 fA resolution), Accuracy: ±(2.0 % of rdg. +30 dgt.)
200 pA range (1.0 fA resolution), Accuracy: ±(1.0 % of rdg. +30 dgt.)
2 nA range (10 fA resolution), Accuracy: ±(0.5 % of rdg. +20 dgt.)
20 nA range (100 fA resolution), Accuracy: ±(0.5 % of rdg. +10 dgt.)
200 nA range (1 pA resolution), Accuracy: ±(0.5 % of rdg. +10 dgt.)
2 μA range (10 pA resolution), Accuracy: ±(0.5 % of rdg. +10 dgt.)
20 μA range (100 pA resolution), Accuracy: ±(0.5 % of rdg. +10 dgt.)
200 μA range (1 nA resolution), Accuracy: ±(0.5 % of rdg. +10 dgt.)
*2 mA range (1 nA resolution), Accuracy: ±(0.5 % of rdg. +30 dgt.)
(1) Measurement speed SLOW2 (internal integration time 13PLC)
(2) At a temperature of 23 °C ±5 °C with humidity of 85% rh
(3) 2 mA range (Measurement speed FAST only)
Resistance measurement capabilities 50 Ω to 2 × 10 ^19 Ω
Note: Resistance measurement accuracy is defined by the current range accuracy and voltage setting accuracy.
Setting voltage range (Accuracy) 0.1 to 100.0 V, 100 mV resolution, Accuracy: ±0.1 % of setting ±0.05% f.s.
100.1 to 1000 V, 1 V resolution, Accuracy: ±0.1 % of setting ±0.05% f.s.
  [SM7120 only]
1000 to 2000 V,1 V resolution, Accuracy: ±0.2 % of setting ±0.10% f.s.
Current Limiter 0.1 to 250.0 V: 5/ 10/ 50 mA, 251 to 1000 V: 5/ 10 mA, to 2000 V:1.8 mA
Measurement time setting Delay: 0 to 9,999 ms
Functions Comparator measurement, deviation measurement, percentage measurement, surface resistivity, volume resistivity, voltage monitor, contact check
Program function 10 types of discharge, charge, measure and measurement sequence discharge patterns can be programmed.
Display LCD (8 lines of 30 characters), with backlight, High voltage warning indicator
Interfaces USB, RS-232C, or , GP-IB
Power supply 100 to 240V AC , 50/60 Hz, 45 VA
Dimensions and mass 330 mm (12.99 in)W × 80 mm (3.15 in)H × 450 mm (17.72 in)D, 5.9 kg (208.1 oz)
Accessories Power cord ×1, Instruction manual ×1, CD-R (Communications command instruction manual, USB driver) ×1, EXT I/O male connector ×1, Short plug ×1


Catalog: SUPER MEGOHM METER SM7110, SM7120, SM7420

Declaration of Conformity



Measurement sensor



1.5 m (4.92 ft)



Interlock Connection Cable DSM8104F

0.1 m (0.33 ft) length

PC communication


RS-232C CABLE 9638

For the PC, 9 pins - 25 pins, cross, 1.8m (5.91 ft) length

RS-232C CABLE 9637

For the PC, 9 pin - 9 pin, cross, 1.8 m (5.91 ft) length


2 m (6.56 ft) length

Drivers, Firmware, Software

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