The Martindale ET4 is a compact electrical tester for measuring voltage, resistance and current. The electrical tester also has frequency, continuity and diode test functions and can also be used as a non-contact voltage indicator. It has the additional functions including auto power off, display hold.

AC / DC Current: 0.1A to 200A
AC / DC Voltage: 0.1mV to 600V
Resistance: 0.1Ω to 50MΩ
Frequency: 30Hz to 400Hz
Continuity: 0.1Ω to 500Ω, buzz at <30Ω
Diode Test: 1mV to 2V
Non-Contact Voltage Indicator: 70V to 600V
Fork maximum conductor size: 15mm diameter
Power: 9V PP3 Alkaline (included)
Low battery indication
Simultaneous measurement
Display backlight
Auto ranging
Dimensions: 202 x 51 x 44 mm
Weight: 200 g (battery included)

Conforms to BS EN 61010-1, BS EN 61010-2-032, CAT III 600 V
Class II, Double Insulation
Pollution Degree 2, indoor use

Conforms to BS EN 61326-1

The ET4's versatility extends beyond basic safety checks, offering a comprehensive suite of functions that empower users to thoroughly assess the integrity of their electrical systems. It features:

• AC and DC Voltage Measurement up to 600V, ensuring users can identify and mitigate potential electrical hazards.


• Current Measurement - measures AC and DC currents up to 200A, enabling users to assess the health of electrical circuits and identify any overloads.


• Resistance Measurement - values up to 50MΩ, ensuring the integrity of electrical connections and components.


• Frequency Measurement - measures the frequency of AC waveforms, ensuring compatibility with various electrical applications and equipment.


• Continuity Testing - identifies the presence of continuity in circuits, ensuring the integrity of electrical connections and preventing short circuits.


• Diode Testing - determines the functionality of diodes, ensuring proper current flow in various electrical circuits.

ET4 electrical tester, TL17 test leads, soft carry case, 9V battery, instruction manual