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A world first hand held instrument that can detect both Surface Discharges using ultrasonic sensors and Internal TEV discharges using electro-magnetic sensors.

Specifically designed for use by non-engineering staff, the UltraTEV combines the ability to detect and indicate the strength of Transient Earth Voltages (TEV) produced by defective insulation as well as indicate the presence of destructive surface discharges.

Green Indicates no serious discharge.  Amber indicates the presence of discharges, but of no cause for concern.  Red means high discharges present and further investigation is recommended.

Simple to use, minimal training required

Lightweight hand held instrument

Low noise highly directional Ultrasonic response

Proven TEV threshold indications

Improves Operator Safety - Check Switchgear before switching

Cost Effective way to obtain TEV & Ultrasonic


TEV Levels - Amber 20dB & Red 29dB

Ultrasonic - Red equiv 40% Gain 11 Detectaids T950


Further Information

TEV Principle of Operation

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