The Electrical Tester PCE-IT100 measures insulation resistances using auxiliary voltages of 125V, 250V, 500V and 1000V, up to a maximum of 4000 MΩ. Furthermore, this Electrical Tester offers the measurement of low resistances up to 400 Ω and a measurement function for alternating and DC voltages. A continuity tester with a beep is also part of the equipment of the insulation meter. In addition to a data-hold function for holding the current measured value, the max. or min. value in the Electrical Tester can also be recorded during voltage and low-ohm measurement. 
Thanks to the large numbers and the lighting, the display of the Electrical Tester is easy to read even under difficult lighting conditions. The large buttons and the rotary knob for selecting the measuring functions allow easy operation of the PCE-IT 100 insulation meter. The Electrical Tester comes with a set of test leads with test probes, a test lead with a crocodile clip and 6 batteries.

- For new plants (dry rooms): 1000 ohms x volts of operating voltage (e.g., at 230 volts > 230 kOhms)
- For new installations (wet rooms, outdoors): 500 ohms x volts of operating voltage
- Earthed devices: 1000 ohms x volts of operating voltage
- Protected devices: 2 MOhm
- Power tools: 2 MOhm
- Protective extra-low voltage: 250 kOhm
- Electrical measuring devices: 5 MOhm
- Common test voltage values are 100 volts for low-voltage and telecommunication systems, 500 volts for building installations and home appliances, and 1000 volts for low-voltage motors and transformers