Kewtech KT300DL Insulation & Continuity Tester

Kewtech

£348.00 / £417.60 incl VAT

  • Ensures compliance with current electrical testing standards
  • Saves time with clear LED indication and audible continuity alerts
  •  Designed for comfort and hands-free testing in real working conditions
  •  Trusted Kewtech build quality – accurate, reliable, and robust
  •  Ideal for both installation verification and ongoing maintenance checks

In stock (can be backordered)

SKU: KEW-KT300DL Category: Brand:

Description

Kewtech KT300DL Digital Insulation & Continuity Tester

The Kewtech KT300DL Digital Insulation/ Continuity Tester is a handheld, single-function tester for determining the insulation and continuity of electrical systems in accordance with 18th Edition regulations.

The Kewtech KT300DL Digital Insulation/ Continuity Tester can perform insulation tests at 50V, 100V, 250V, 500V and 1000V, and can be used to determine the breakdown voltage.

In addition to this, the Kewtech KT300DL Digital Insulation/ Continuity Tester will indicate the presence of voltage via a dedicated LED. It also features a continuity test with an audible tone and can measure continuity up to 19.99kΩ.

Furthermore, the Kewtech KT300DL Digital Insulation/ Continuity Tester is equipped with a number of functions designed to improve measurement accuracy and reliability, as well as testing convenience. The Kewtech KT300 Digital Insulation/ Continuity Tester includes a test lead null feature and a Buzzer mode. It also includes a Hands-free function and an Auto Power Off function which works to preserve the KT300DL’s battery life.

The Kewtech KT300DL Digital Insulation/ Continuity Tester is an ergonomic, easy-to-use, accurate single-function electrical tester. It is ideal for ensuring compliance with 18th Edition regulations.

Kewtech KT300DL Digital Insulation/ Continuity Tester Key Features

  • A handheld, single-function tester
  • Determine the insulation and continuity of electrical systems
  • Maintain compliance with 18th Edition regulations
  • Perform insulation tests at 50V, 100V, 250V, 500V and 1000V
  • Continuity test with an audible tone
  • 30 kΩ continuity range for verifying extraneous conductive parts
  • Measure continuity up to 19.99kΩ
  • Indicate the presence of voltage via a dedicated LED
  • Determine breakdown voltage
  • SPD test
  • Test lead null feature
  • Buzzer mode
  • Hands-free function
  • Auto Power Off function
  • An ergonomic, easy-to-use, accurate single-function electrical tester
  • Ensures compliance with 18th Edition regulations

What’s Included?

  • Kewtech KT300DL Digital Insulation/ Continuity Tester
  • Kewtech ACC020 Two-Wire Test Lead Set
  • Carry Case
  • Manual
  • Batteries
Specification

Kewtech KT300DL Digital Insulation/ Continuity Tester Technical Specifications

Continuity Test Range Accuracy
RangeTolerance (@20ºc)
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
Test VoltageRanges (Auto Range)Tolerance (@ 20°C)
50 V0.01 to 9.99 MΩ± (6% + 2 digits)
10.0 to 49.9 MΩ± (6% + 2 digits)
100 V0.01 to 999 MΩ± (6% + 2 digits)
10.0 to 99.9 MΩ± (6% + 2 digits)
250 V0.01 to 9.99 MΩ± (3% + 1 digits)
10.0 to 99.9 MΩ± (3% + 1 digits)
100 to 199 MΩ± (6% + 1 digits)
500 V0.01 to 9.99 MΩ± (3% + 1 digits)
10.0 to 99.9 MΩ± (3% + 1 digits)
100 to 199 MΩ± (3% + 1 digits)
200 to 499 MΩ± (6% + 1 digits)
1000 V0.01 to 9.99 MΩ± (3% + 1 digits)
10.0 to 99.9 MΩ± (3% + 1 digits)
100 to 399 MΩ± (3% + 1 digits)
400 to 999 MΩ± (6% + 1 digits)
Insualtion Output Voltage
VoltageLoadOutput CurrentTolerance
50 V50 kΩ1 mA-0% +20%
100 V100 kΩ1 mA-0% +20%
250 V250 kΩ1 mA-10% +20%
500 V500 kΩ1 mA-10% +20%
1000 V1 MΩ1 mA-10% +20%
Short circuit current (into 2k Ω)< 2 mA
Typical Test Time (10 MΩ)< 2 seconds
General Specifications
Power supply4 x AA LR6 Batteries
Battery life50 hours
Overvoltage categoryCAT III 500V
CAT IV 300V
Operating temperature0 – 40ºC
Storage temperature-10 to 60ºC
Operating humidity80% @ 31ºC to 50% @ 40ºC
Safety complianceBSEN 61010-2-030:2010
EMC complianceBSEN 61326-2-2:2013
Performance standardBSEN 61557-1:2007
BSEN 61557-2:2007
BSEN 61557-4:2007
ProbesGS38 compliant
Dimension (mm)180mm x 85mm x 50mm
Weight (g)Approximately 450g
  • Kewtech KT300DL Digital Insulation/ Continuity Tester
  • Kewtech ACC020 Two-Wire Test Lead Set
  • Carry Case
  • Manual
  • Batteries

🚚 Testersmans Shipping Policy

Free Mainland GB Delivery Over £150

We offer free delivery on most mainland Great Britain orders over £150 (ex VAT).
This applies across England, Wales, and most of Scotland, excluding certain remote or offshore postcodes.

If your order total falls just short of £150, or you’re a returning customer, feel free to contact us — we may be able to offer a discount code or delivery workaround.
📞 01945 738112 | ✉️ [email protected]


📦 UK Delivery Options

We work with both Royal Mail and DHL to offer reliable and flexible delivery across the UK:

  • Royal Mail – Best suited for lighter parcels and for customers in remote regions, including the Highlands, Islands, and Northern Ireland.
  • DHL – Ideal for most mainland UK orders, providing fast, tracked delivery and excellent reliability for time-sensitive shipments.

Our checkout system automatically displays the available delivery services for your postcode and order weight, ensuring you always see the most suitable options.

Note: Heavy, bulky, or freight-only orders will be charged separately.
Our website is designed for quick, transactional purchases rather than bulk or palletised orders.
Please contact us in advance for a tailored freight quotation if your order falls into this category.


⏱ Dispatch & Delivery Timing

We aim to dispatch all in-stock orders promptly, but delivery depends on both when you order and which service you select.

  • UK orders: placed by 2:00 PM Monday–Friday are usually dispatched the same day.
  • International orders: placed by 2:00 PM Monday–Thursday are usually dispatched the same day.

Orders placed after these times are processed the next working day. This means delivery may occur the following day or later, depending on the courier and service selected.

Once dispatched, your chosen delivery service determines how quickly your parcel arrives:

  • Standard services We use Royal Mail Tracked 24 or DHL Parcel as our ‘Standard’ services. They are not guaranteed to arrive next working day.
  • Premium services (e.g. Royal Mail Special Delivery or DHL by Noon) offer guaranteed delivery windows.

If your order is time-sensitive, we strongly recommend choosing a guaranteed service or contacting us before ordering to confirm availability.

Please note: For logistical reasons, we may occasionally adjust the delivery method selected at checkout. For example, smaller items may be better suited to letterbox-friendly packaging or may be at greater risk of delay or loss via certain services. We actively monitor courier and postal service disruptions—including strikes and delays—and may modify shipping arrangements to help ensure timely and secure delivery.


📅 Busy Periods & Delays

We always aim to dispatch promptly, but delivery times may be affected by:

  • Seasonal demand (e.g. Christmas, bank holidays, or industry shutdowns)
  • Courier network delays outside our control
  • Supplier lead times or calibration requirements for certain equipment

If your delivery is time-critical, please contact us before ordering so we can confirm stock and courier availability.


🌍 International Shipping

We ship worldwide using UPS Express Saver® and other trusted global courier partners. All international shipments are tracked and generally dispatched Monday to Thursday to ensure smooth customs clearance and transit.

Estimated delivery times:

  • Europe: 1–2 working days
  • North America: 2–3 working days
  • Asia-Pacific & Rest of World: 3–5 working days

Delivery times vary depending on location, customs clearance, and local courier performance.


💰 Taxes, Customs & Import Duties

International customers are responsible for any applicable taxes, customs charges, or import duties.
These are not included in our product or shipping prices.

Your courier will typically provide a secure payment link for any import charges once your parcel reaches customs.
If import fees are refused and the parcel is returned, we will issue a refund minus all incurred shipping and return costs.


📍 Using Your Own Courier

If you would prefer to arrange collection via your own courier (UK or international), please contact us before placing your order to coordinate collection from our Wisbech warehouse.


📝 Important Notes

  • Please ensure your delivery address and contact number are correct at checkout.
  • Undelivered parcels may be returned to us after a short holding period.
  • Redelivery or return fees may apply, even if your order originally qualified for free delivery.
  • By placing an order, you confirm your understanding and acceptance of this policy.

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