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Product Overview

Phase sequence testing is crucial for many three-phase loads. Improperly connected motors can result in reverse rotation, which can damage the equipment powered by the motor. Ensure electrical equipment is correctly and safely connected with Amprobe's PRM-4 Phase Sequence and Motor Rotation Tester.
  • Identifies 3-phase sequence and open phase check
  • Motor shaft rotation indication protected by CAT III circuitry
  • 3 phase to phase input voltage, 100V ac to 600V ac max 
  • Supplied with three CAT III rated color coded large alligator clips and test leads
  • 45 to 70 Hz frequency


Sensing & Instrumentation; Signal Processing; Test & Measurement; Portable Devices


Test Leads (red, green, and blue) with alligator clips (TL-PRM-4), Soft Vinyl Case, Users Manual & 9 V Battery.
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Product Specifications, Documents & More

  • External Depth: 35mm
  • External Height: 153mm
  • External Width: 72mm
  • Kit Contents: Test Leads with Alligator clips (TL-PRM-4), 9 V battery, soft vinyl case and users manual
  • No. of Batteries: 1
  • Operating Temperature Max: 40°C
  • Operating Temperature Min: 0°C
  • SVHC: To Be Advised
  • Test Frequency Range: 45Hz to 70Hz
  • Voltage Measuring Range AC: 100V to 600V
  • Weight: 218g

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Availability:  14

  • 14 in stock for same day shipping
Check stock and lead times
    More stock available week commencing 12/28/15

Price for: Each 1

Minimum order quantity: 1

Order multiple quantity: 1

Price: $116.96 $116.96



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1+ $129.95

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Customer Reviews

Emergency Generator Must Have This tester will allow you to hook up your 3 phase generator or motor and know the rotation without having to turn the equipment on and guess. In the case of emergency generators matching your utility phasing, you need to know the rotation. Trust me. May 26, 2015
Must have tool to check phases This is a must have tool, very useful in checking phase sequence. These type items make it clear that the rotation is correct. Used often after storm restoration to check the service has been connected correctly for the air conditioners. The easy to use hook up of the leads makes for a sure and true connection and that phase or rotation is running in the correct direction. March 27, 2012
first time's a charm Great rotation meter. No more 50/50 chance of proper phase rotaion. Get it right the first time, every time! A must have for motor loads in which wrong rotation will cause equipment damage. Simple, precise, and long test leads are a plus. November 23, 2011
This product is user friendly with fast results In an industrial environment three phase motors are predominant and having this phase sequence tester in my tool bag has made me more efficient at my job November 16, 2011
work great we just got the amprobe phase sequence and motor rotation tester to test pump motors and has work great for us November 16, 2011
  • 2015-06-11T15:22:19.713-05:00
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