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Kewtech KT300 Digital Insulation/Continuity Tester

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  • Performs highly accurate insulation and continuity tests
  • Multiple features to ensure error-free results
  • Ergonomically designed for comfortable hand-held use

rrp £399.00

now £319.00 (Ex. VAT) £382.80 (Inc. VAT)

rrp £399.00


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  • Description

    Kewtech KT300 Digital Insulation/Continuity Tester

    The Kewtech KT300 Digital Insulation/Continuity Tester is a highly polished and ergonomically designed device, ideal for complying with 18th edition testing regulations. The KT300 is a single function tester which can perform accurate insulation tests up to 1000V and continuity tests up to 19.99kΩ.

    With a variety of functions included as standard, the Kewtech KT300 provides accurate and easy to interpret test results on a digital display. An audible tone feature, test lead null facility, buzzer mode, hazard warning LED and hands free function are all incorporated. The KT300 is not just an extremely dependable piece of kit, but an exceptionally reliable one too.

    Compact and lightweight, the Kewtech KT300 utilises large buttons and a user friendly tactile dial interface. Boasting a 50 hour battery life and auto power off functionality which preserves operational capabilities for longer lasting jobs. The KT300 has a CAT III 500V and CAT IV 300V rating.

    Key Features

    Capable of insulations tests at 50V, 100V, 250V, 500V & 1000V
    Continuity tests at multiple ranges up to 19.99Ω
    Hands free function for user convenience
    Test lead null feature and buzzer mode
    Voltage present LED included as a useful safety feature
    50 hour battery life and auto power off function
    Ergonomic design with a tactile interface
    CAT III 500V and CAT IV 300V

    Kewtech product number: 2842344

  • Specification

    Continuity Test Range Accuracy

    RangeTolerance (@20˚C)
    0.00 to 9.99 Ω +(3% + 2 digits)
    10.0 to 99.9 Ω +(3% + 2 digits)
    100 to 19.99 kΩ +(3% + 2 digits)
    Open circuit Voltage >4V, <10V
    Zero offset adjust (test lead null) 5 Ω
    Typical Test Time (2 Ω) >2 seconds
    Hazard Warning LED >25V


    Run Leakage

    ItemLoad CurrentLeakage Current
    Test VoltageRanges (Auto Range)Tolerance (@ 20˚C)
    50V 0.01 to 9.99 MΩ
    10.0 to 49.9 MΩ
    ±(6% + 2 digits)
    ±(6% + 2 digits)
    100V 0.01 to 999 MΩ
    10.0 to 99.9 MΩ
    ±(6% + 2 digits)
    ±(6% + 2 digits)
    250V 0.01 to 9.99 MΩ
    10.0 to 99.9 MΩ
    100 to 199 MΩ
    ±(3% + 1 digits)
    ±(3% + 1 digits)
    ±(6% + 1 digits)
    500V 0.01 to 9.99 MΩ
    10.0 to 99.9 MΩ
    100 to 199 MΩ
    200 to 499 MΩ
    ±(3% + 1 digits)
    ±(3% + 1 digits)
    ±(3% + 1 digits)
    ±(6% + 1 digits)
    1000V 0.01 to 9.99 MΩ
    10.0 to 99.9 MΩ
    100 to 399 MΩ
    400 to 999 MΩ
    ±(3% + 1 digits)
    ±(3% + 1 digits)
    ±(3% + 1 digits)
    ±(6% + 1 digits)


    Insulation Output Voltage

    VoltageLoadOutput CurrentTolerance
    50V 50kΩ 1mA -0% +20%
    100V 100kΩ 1mA -0% +20%
    250V 250kΩ 1mA -10% +20%
    500V 500kΩ 1mA -10% +20%
    1000V 1MΩ 1mA -10% +20%
    Short circuit current (into 2k Ω) < 2 mA
    Typical Test Time (10MΩ) < 2 seconds
  • Supplied Accessories

    KT300 Digital Insulation/Continuity Tester
    ACC020 two wire test lead set
    Carry Case
    Calibration certificate

  • Product Documents

    Product Attachments

    View FileKewtech KT300 Digital Insulation/Continuity Tester Datasheet    Size: (149.55 KB)
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  • Delivery Information

    At we understand the importance of a reliable delivery service when shopping online. Especially when the goods are often essential to your working day. If your goods are required by a certain date please feel free to contact us for an honest and realistic indication whether this can be met. We aim to process all orders we receive within 1 to 3 working days, however from time to time we do have an increased demand for certain products or there might be delays from the manufacturer. In such cases delivery of your equipment may be subject to a minor delay.

    We use DPD/Interlink for all larger items and Royal Mail for smaller items and accessories. With DPD/Interlink you will receive a 1 hour delivery window on the day of delivery via e-mail/text and a notification 15 minutes before arrival so you will not have to wait around all day. You can even manage your booking online and re-arrange delivery for another date or arrange the goods to be left with a neighbour of your choice.

    We also offer delivery options for goods required urgently on certain products, all which are sent by DPD/Interlink.

    Our charges for UK deliveries:

    • FREE Delivery (on select products only): typically 3-5 working days*
    • Standard Delivery at £4.95: 2-3 working days
    • Next Working Day Delivery (on select products only) at £7.50
    • Pre-Noon Next Working Day Delivery (on select products only) at £9.50*
    • Pre-10.30am Next Working Day Delivery (on select products only) at £18.50*
    • Saturday Pre-Noon Delivery (on select products only) at £14.50*
    • Sunday Pre-Noon Delivery (on select products only) at £14.50*

    *UK mainland only

    NOTE! For next working day or Saturday/Sunday delivery options the order MUST be placed no later than 3pm on the working day before delivery is required. After 3pm, please arrange with our staff before selecting a priority delivery service. Priority services are available to UK mainland residents only (this might exclude certain areas in the north of Scotland).

    Customers outside the UK: exports to many countries all over the world. Prices for shipping vary on location and weight/dimensions. Costs are calculated for certain countries at the checkout. If your country is not included in this list please e-mail with your name, address and the items you would like to order for an accurate shipping quote or go to for more information.

    For more information on delivery, please see our terms and conditions.