Complimentary — US Shipping Only
Your Free
Power Quality
Reference Ruler
PMI's PQ Ruler packs essential power quality formulas, IEEE industry standard limits, ITIC & CBEMA tolerance curves, and engineering reference material into a durable 6″ ruler — ready for fieldwork or your desk.
PQ Formulas
IEEE Standard Limits
ITIC / CBEMA Curves
Voltage Sag & THD
Handy 6″ Format
White Paper
Read the PQ Ruler White Paper while you wait for yours to arrive
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6"
Ruler Length
100%
Free — No Cost
2
Sides of Data
US
Addresses Only
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Power Quality Reference, Right at Your Fingertips
Engineered for power quality engineers and utility professionals, the PMI PQ Ruler is a field-ready quick-reference tool that puts critical data in your shirt pocket — no more flipping through standards documents on the job.
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Power Quality Formulas — Voltage sag, THD, unbalance, flicker, and more, pre-calculated for rapid field reference.
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IEEE Industry Standard Limits — Key limits from IEEE 519, 1159, and related standards summarized in one compact format.
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ITIC & CBEMA Tolerance Curves — Instantly visualize whether a voltage event falls within acceptable limits.
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Engineering Reference Material — Compact enough for a toolbox, detailed enough to be genuinely useful on-site.
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Free Companion White Paper — Dive deeper at powermonitors.com/whitepapers/pmi-pq-ruler.