Martindale PSI4000 Three Phase Sequence Indicator

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  • Non-contact phase rotation testing 
  • Indicates clockwise and anti-clockwise
  • Enhanced brightness switch for clear indication in strong ambient light. 

rrp £229.00

now £175.00 (Ex. VAT) £210.00 (Inc. VAT)

rrp £229.00


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"Non-Contact Three Phase Rotation Tester"

  • Description

    Martindale PSI4000 Three Phase Sequence Indicator

    The Martindale PSI4000 Three Phase Sequence Indicator enables non-contact measurement of phase rotation via inductive crocodile clips. Simply attach the crocodile clips around the conductors and the LEDs on the unit will give a clear indication of either clockwise or anti-clockwise phase rotation. It can be used to quickly identify three phase sequences for motor installations and repair.

    The PSI4000 phase rotation tester can be used on both insulated and non-insulated conductors and also has a switch for increasing the brightness of the LEDs so that phase sequence can be clearly visible in all light conditions.

    In addition the Martindale PSI4000 provides an audible indication of rotation and has a magnetised back that enables hands free testing by easily fixing to a metal surface for convenience.

    An "Auto Off" function activates after five minutes of non detection to preserve battery life.

  • Specification

    • Measurement Principle: Static Induction
    • Input Voltage: 150V - 1000V 3 Phase AC
    • Frequency Range: 45 - 65Hz
    • Battery Current Consumption: 15mA
    • Cable Length: 800mm
    • Power Source: 1.5V x 4 AA / LR6 alkaline batteries
    • Auto-Off: After 5 mins of non activity
    • Safety Standard: EN 61010 CAT III 1000V, CAT IV 600V, EN 61326-1
    • Weight: 370g
    • Dimensions: 118 x 69 x 38mm
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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.

    For more information on delivery, please see our terms and conditions.