• Product Description

    Developed, after extensive customer research, specifically to meet the needs of today’s electricians, the new MIT300 range of insulation and continuity testers from Megger is not only durable and easy to use, but also incorporates a comprehensive set of features designed to ensure operator safety, even under conditions of accidental misuse.

    The range includes four models, ensuring an exact match for the needs of every user, all of which offer automatic discharge of the circuit after testing, audible and visual warning if the test probes are applied to a live circuit, and a test inhibit feature which operates automatically under live circuit conditions. The units also conform fully to IEC 61010-1 for use in Category IV 300 V and Category III 600 V applications, and provide all of the facilities needed to meet insulation testing requirements relating to the current edition of the IEE Wiring Regulations.

    In line with other products in Megger's comprehensive range, MIT300 insulation testers feature rugged construction, with an impact-resistant rubber-overmoulded case, and innovative circuitry which guarantees high accuracy combined with stability of calibration.

    All instruments in the new range provide indication of insulation resistance up to 999 Mohms, 200 mA continuity testing, a fast-reacting continuity buzzer, and facilities for nulling the resistance of the test leads. The entry-level MIT300 offers insulation test voltages of 250 V and 500 V, while the remaining models allow testing at 250 V, 500 V and 1,000 V.


    Extremely easy to use

    Tough rubber armoured case

    Self contained protective cover

    Live circuit warning

    Weatherproof to IP54

    Intelligent Safety System for protection.

    What Is Included:

    Megger MIT300 Insulation and Continuity Tester

    Test Lead Set with Crocodile Clips

    Item Specification

    Nominal Test Voltage MIT300: 500V, 250V (DC)
    Measuring Range 10kΩ to 999MΩ on all ranges
    Short Circuit Current 1.5mA nominal
    Test Current on Load 1mA at min. pass values of insulation (as specified in BS7671, HD 384 and IEC 364)
    Accuracy (at 20°C) MIT300, 310, 320, 330: ±3% ± 2 digits up to 10MΩ, ±5% up to 100MΩ, ±30% up to full scale
    Measuring Range 0.01Ω to 99.9Ω (0-50Ω on analogue scale)
    Open Circuit Voltage 5V ± 1V
    Short Circuit Current MIT300, 310, 320, 330: 205mA + 10mA -5mA
    Continuity Accuracy MIT300, 310, 320, 330: ±3% ± 2 digits
    Measuring Range 0-2/20/200/2kΩ
    Open Circuit Voltage 1.5V ± 0.5V
    Zero Offset Adjust MIT300, 310, 320, 330: 0 - 9Ω
    Continuity Buzzer MIT300, 310: operates at <5Ω MIT300, 310, 320, 330: response time <20ms
    Voltage Range  
    Measuring Range 0 to 600V AC (50/60Hz) or DC
    Temperature Coefficient <0.1°C per °C on all ranges
    Default Voltmeter  
    MIT300 Beeps and flashes V on the display
    Test Inhibit If more than 50V is detected testing will be inhibited

    Additional Details

    Type Multifunctional Testers