Instruments
HELIX PEC
A handheld pulsed eddy current instrument that screens wall response through coatings and insulation. No surface prep, no bare metal, no couplant, and no shutdown: the line stays in service while it is read.
- Measures wall response through coatings, insulation and cladding
- Readings are verified against ultrasonic (UT) checks at set points
- Every reading is registered to its physical location on the asset model in HELIX Horizon
- Deployed as PEC-1a and PEC-1b
HELIX PEC, wall-response screening
- System
- HELIX PEC-Rev1 (deployed units PEC-1a, PEC-1b)
- Measurement
- Decay constant τ (ms) of the transient eddy-current response, reported as relative apparent-wall response
- Probe
- Concentric coil, 90 mm excitation, 40 mm read
- Footprint
- ~90 mm. Each reading is a footprint average
- Material
- Ferromagnetic metal. Comparisons valid within consistent material and geometry
- Reference framework
- ISO 20669:2017 (reference only)
Honest limits
PEC is footprint-averaged: it responds to ferromagnetic deposits as if they were wall, and does not resolve isolated pitting. PEC values are relative, based on τ, rather than absolute thickness, unless a material reference exists.
The rest of the range
Screening, not certification. HELIX screening prioritises where to look next and does not certify to any code scheme. Fitness-for-service remains a regulated engineering assessment carried out by your engineers. Individual technical specifications (HLX-SPC series) are available on request.