DT-5503 Analogue Insulation Tester

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  • Provides the actual AC voltage measurements of the mains supply
  • Incorporated live circuit warning function for increased safety
  • Three insulation test ranges - 250V, 500V and 1000V
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  • Description

    DT-5503 Analogue Insulation Tester

    The DET-5503 Analogue Insulation Tester is a simple, handheld and highly compact insulation and continuity tester. Providing users with three insulation test ranges (250V, 500V and 1000V), a 500Ω resistance range and a 3Ω continuity range. The tester also has 1.3 mA test current for MΩ range at rated voltage and 210 mA short current for continuity range.

    Built with a "Live Circuit Warning", the DET-5503 displays the actual AC voltage measurements of the connected mains supply. In addition to the large display with bright backlight, this analogue tester includes a single tactile rotary dial and CAT III-1000V safety rating.

    Key Features

    • Analogue insulation tester
    • There insulation test ranges - 250V, 500V & 1000V
    • 500Ω resistance range
    • 3Ω continuity range
    • 1.3 mA test current for MΩ range at rated voltage
    • 210 mA short current for continuity range
    • Live Circuit Warning built-in
    • Displays the AC voltage measurements of the mains supply
    • Handheld, compact and lightweight
    • Large display
    • Bright backlight function
    • Single dial operating system
    • CAT III-1000V rating

    Part number: DT-5503

  • Specification

    Insulation Test

    • DC Test Voltage: 250V 500V 1000V
    • Measuring Ranges (Mid-Scale Value): 0-100MΩ(1MΩ);0-200MΩ(2MΩ);0-400MΩ(4MΩ)
    • Rated Current: 1mA DC+20%, -0%
    • Output short Circuit Current: 1.3mA DC approx
    • Accuracy Guaranteed Ranges: 0.05-10MΩ ±5%; 0.1-20 Ω ±5%; 0.2 -40MΩ ±5%;
    • Accuracy: ±7% of Scale length at ranges other than above ranges

    Continuity Test Ranges

    • Accuracy: ±1.5% of Scale Length
    • Open Circuit Voltage Output: 4.1VDC (Approx)
    • Short Circuit Current Output: 210mA Min

    AC Voltage Warning

    • AC Voltage Range: 0-600V AC for 30 seconds
    • Accuracy: ±5% of Scale Length
    • Input Impedance: 1.2MΩ


    • Withstand Voltage: 7400V AC 50Hz or 60Hz for one minute between electrical circuits and housing case
    • Safety Standards: IEC 61010-1 CAT III
    • Size (H x W x D): 200mm x 92mm x 50mm
    • Weight: 546g
  • Supplied Accessories

    • DT-5503 Analogue Insulation Tester
    • Test leads
    • 6 x AA battery
    • Carrying case
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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.

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