Martindale PSI4300 Non Contact Phase Sequence Indicator

Martindale Electric

Martindale approved distributor and service centre.

The PSI4300 indicates correct phase sequence as an anti-clockwise rotation.

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Usually Stock or Short Lead Time

£ 192.00 rrp £ 240.00

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(£ 230.40 inc VAT.)

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The Martindale PSI4300 is a unique phase rotation indicator that carries out the measurement via inductive crocodile clips. This method increases the safety of the user, whilst the bright green LEDs give a clear primary indication of anti-clockwise phase rotation.

The design of this phase rotation tester allows for use on both insulated or uninsulated conductors, and an "Enhanced Brightness" switch makes indication brighter in strong ambient light. A combination of both rotating LEDs and buzzer tones indicate clockwise or anti-clockwise rotation.


Non-contact for improved safety and ease of use.
Works on both insulated and uninsulated conductors.
Bright LED and buzzer indication of live phases and sequence.
Positive indication for anti-clockwise rotation.
High quality colour coded clips.

Martindale PSI4300 Specifications:

  • Measurement Principle: Static Induction.
  • Anti-clockwise Indication.
  • Input Voltage: 150V - 1000V 3 Phase AC.
  • Frequency Range: 45 - 65Hz.
  • Sensor clip cable length: Approx. 800mm.
  • Minimum conductor diameter: 2.4mm.
  • Maximum conductor diameter: 30mm.
  • Power Source: 1.5V x 4 AA / LR6 alkaline batteries.
  • Low battery warning: Power LED flashes below 4.6 ± 0.1V DC battery voltage.
  • Auto off: After 5 mins of non-activity.
  • Dimensions: 118 x 69 x 38 mm.
  • Weight: 370g approx (batteries included).
  • PSI4300 warranty: 2 years.

Includes: Martindale PSI4300, 4 x 1.5V alkaline batteries, soft case & instructions.

Indication Anti-Clockwise
Non-Contact Yes
Direction Indication LED

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Martindale PSI4300 Non Contact Phase Sequence Indicator