Martindale BZ701 Audible Socket Tester with Mains Polarity Check


£45.00 / £54.00 incl VAT

  • Quick and Easy Indication
  • Indicates 28 different fault conditions
  • Super bright LED’s
  • Correct and Incorrect incoming supply polarity indication
  • Standby/Alert Mode

In stock (can be backordered)

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It is fair to say that when it comes to a first line of defence in electrical safety, socket testers are a great way of keeping anyone working with electricity safe. Consequently, there are a huge variety of socket testers on the market and it can be difficult to choose which one is best suited to the application you are working on. All socket testers will check basic connections have been made correctly, however three new Martindale Electric socket testers give professionals more features and less headaches when it comes to choosing the right unit for the job in hand.

Martindale Electric’s BZ701, for example, not only detects the basic 28 socket wiring fault conditions and checks the mains voltage level, it also safely detects Line-Neutral reversal (cross polarity) at the incoming supply. The polarity swap test detects fault conditions on PME/ TN-C-S systems (the most common type of supply) that cannot be identified by normal socket testers. It is easily activated by using the touch pad on the BZ701. Correct polarity is indicated by three flashing green LEDs. A fault condition is clearly indicated by three red LEDs and a warning buzzer.

Key features:

  • Incorporates all standard BZ101 indications for both correct wirings as well as 28 different fault conditions.
  • Checks the polarity of the incoming supply via the Blue Polarity Touchpad on the front of the unit.
  • Correct incoming supply polarity is indicated by the flashing green LED’s accompanied by the continuous buzzer.
  • Incorrect supply polarity will be indicated by the LED’s turning RED and a pulse tone on the buzzer. This will continue after the removal of the finger from the touchpad and confirming a need for further investigation.
  • The BZ701 has a standby mode which activates after 10 minutes. In this situation, the lights will extinguish and only the centre LED will flash AMBER. The tone will also sound every 5 seconds to alert the user.


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