Stop the Surge Before It Reaches the Instrument

S-QDP protects sensitive field instruments from lightning and switching transients with 10kA nominal and 20kA maximum discharge capability per line. An ultra-low protection level of ≤15V and response time below 1ns help clamp dangerous transient energy before it reaches transmitter electronics.

Protect the Loop Without Disturbing the Signal

Surge protection remains continuously connected without compromising normal instrument communication. With loop impedance below 5Ω, insertion loss below 0.5dB and DC–10MHz bandwidth, S-QDP supports transparent transmission of standard industrial analog and fieldbus signals.

Put Surge Protection Where It Matters Most

The compact stainless steel tubular body is designed for in-line installation near the field instrument, junction box or instrument cable entry. Its IP67 enclosure and M20×1.5 connection simplify retrofit protection without modifying the instrument or rebuilding the control cabinet.