Insulation Testers

Insulation testers apply a high-voltage signal (typically between 1 kV and 15 kV) to the tested component. The device then measures the current flowing through the object and subsequently a resistance measurement according to Ohm’s law V=IR. Higher resistance values generally indicate good insulation, while lower values suggest deterioration or faults.

Choosing the right insulation resistance tester involves considering the voltage level (1 – 15 kV), the accuracy required, and the measurement or resistance range required to measure. Our range of specialist equipment allows the user to correctly test if the levels of resistance in the tested item are safe or not with high accuracy reliable results. In addition, you should consider the ease of use, durability, and support of the product. We at Zedflo are the factory direct Australian importer of the manufacturer ‘Metrel’, with an in house authorised repair and NATA accredited calibration facility, so rest assured we offer second to none after sales support and service for our products. It’s no fluke that Metrel is becoming one of Australias most popular brands in the market.

Get in contact with us to help you choose the best insulation resistance testing equipment for your situation or application.

Insulation resistance testers range from basic manual models to advanced digital testers with features like memory storage, and trend analysis. They also vary in voltage ranges, from 1 kV for basic applications to 15 kV or higher for industrial use. Our digital insulation tester models provide clear and reliable results, rather than old analogue dial measurements of the past. We believe in providing a wide range of products to meet the plethora of needs our clients have.

Our 1 kV insulation testers are highly sufficient for standard electrical systems and residential applications. While they are user-friendly our products are also cost-effective. In addition to ease of use and low cost, they provide testing capabilities, such as continuity checks and spot readings of insulation resistance. Our 1 kV testers suit electricians and maintenance technicians who need reliable, straightforward equipment. Our multifunction installation testers also include 1 kV insulation testing functions.

Metrel recently released a new generation of insulation resistance testers in the MI3211 and MI3215, these are high power, portable, battery (with new new high capacity li-ion batteries) or mains powered test instrument with excellent IP protection (IP65), as they are housed in a compact rugged case. They offer a robust build and high immunity to radiated EM fields, meaning they are best suited for demanding environments.

Making use of a clear colour touch screen display (or key manipulation) via a menu-driven LCD these compact instruments enable simple and transparent selection of different measurement methods and easy entry of data, the interface is similar to many other newer generation models in Metrel’s product range so if you have used those it will look very familiar, and inbuilt memory to store your insulation resistance measurement results.

Our 5 kV, 10 kV, and 15 kV insulation testers are designed for high-voltage applications, offering advanced diagnostic features like step voltage testing, dielectric absorption ratio (DAR), and polarisation index (PI). Electricians and technicans can utilise our products for testing high-capacity motors, transformers, and cables. Our new range of testers includes the latest features, such as digital display, data logging, and simple data analysis.

The accuracy of an insulation tester is essential for reliable diagnostics. Accuracy can be influenced by the tester’s design, wear on your cables and connection points, environmental factors, and calibration. Regular calibration and potentially adjustment as required is paramount to ensure the tester is measuring accurately and within all the required Australian standards. Our in house ISO17025 NATA accredited calibration lab can look after all your calibration requirements.

Our range of testers will satisfy anyone in the electrical field, offering safety and performance. From the advanced 5 kV, 10 kV and 15 kV models perfect for industrial applications to the user-friendly 1 kV testers for domestic systems, we have the ideal tool for every job.

Each instrument includes all test leads to get started and our products ensure reliable, accurate testing and advanced diagnostics, simplifying your work while enhancing safety.

Let us help you with your insulation testing needs and experience the difference in quality and efficiency.

MI 3210 TERAOHM XA 10KV

• Portable (battery or mains powered)
• Excellent IP protection (IP65)
• High DC test voltages of up to 10 kV
• CAT IV protection
• CAT III compliance for safety
• All required test leads
• The MI 3210 TERAOHM XA 10KV is also ideal for preventative maintenance applications, helping to identify potential issues before they lead to equipment failure.

MI 3205 TERAOHMXA 5KV

• Portable (battery or mains powered)
• Excellent IP protection (IP65 case closed and IP54 case open)
• High test voltages up to 5 kV
• All required test leads
• Additionally, the MI 3205 TERAOHMXA 5KV is also useful for troubleshooting electrical systems, enhancing safety and performance.

MI 3201 TERAOHM 5 KV

• Automated testing – PI, DD, DAR calculations with automated resistance ranging (AR). All data is displayed during one single measurement.
• Fault finding – Fully programmable step voltage and withstanding voltage test functions to assist in diagnosing faults in insulation.
• R(t) graph – Real time resistance against time graph plotting facility to graphically illustrate the response of a material to an applied test voltage.
• Faster testing – High 5 mA charging current quickly charges capacitive loads.
• Accurate – Selectable noise rejection filters (up to 5 mA) and shielded cables as standard ensure accurate readings
• Safe – High CAT IV, 600 V voltage protection
• Complies with IEC/EN61557-2, EN 61326 class B, EN 61010-1 (instrument) & EN 61010- 031(accessories)

MI 3202 GIGAOHM 5 KV

• Five test voltages up to 5 kV
• 1 TΩ resistance measuring range
• Large analogue/digital LCD screen
• Strong and durable carrying case

MI 2077 TERA OHM 5 KV

• Insulation resistance measurements up to 5TΩ
• PI, DD and DAR testing
• Data can be downloaded to PC
• Lightweight design

MI 3121 Insulation / Continuity tester

• Very large LCD display with bar graph and backlight
• High measuring range of up to 30 GÙ with test voltage from 50 V to 1000 V
• Fast and reliable continuity tests with automatic polarity reversal
• Voltage and frequency measurements
• Preprogrammed limits
• PASS/FAIL evaluation of measurement result
• Bright GREEN/RED indicators provides visual evaluation of results
• Suited for testing on CAT IV installations
• Magnetic holder allows hands-free operation
• Built-in battery charger
• Two level memory structure for saving of test results and parameters
• Basic downloading with EuroLink PRO PC SW package
• Compatible with EuroLink PRO Plus PC SW package
• USB and RS232 ports
• Designed to be robust and ergonomic