Anti-Interference Pressure Transmitter Solves VFD Noise Issue

Ever had a Industrial Pressure Sensor that showed stable readings until a VFD kicked in? We traced a 25% pressure drop to electromagnetic interference (EMI) from a variable frequency drive. The DR3411 couldn’t handle the noise, causing production line issues.

First, we checked wiring and process conditions—all normal. Then, we suspected EMI. VFDs generate common-mode noise that couples onto sensor cables, overwhelming standard transmitters. Shielded cables helped but didn’t eliminate the drop.

Therefore, we ran lab tests simulating VFD operation. The results confirmed EMI as the root cause. The solution? Switching to the DR3411 Industrial Pressure Sensor, an anti-interference pressure transmitter with onboard EMI filtering.

As a result, after installation, readings remained stable during VFD ramp-up. The DR3411 Industrial Pressure Sensor is designed for harsh environments, offering excellent electromagnetic anti-interference and high overpressure capability. It also provides a variety of process connections and long-term reliability.

For more on EMI mitigation, check out this guide from Control Engineering: [EMI in industrial settings]( https://www.controleng.com/articles/emi-in-industrial-settings/ ). Also, ISA’s resources on sensor selection are helpful: [ISA sensor guide](https://www.isa.org/standards-and-publications/isa-publications/).

What’s your success rate with shielded cable against VFD noise? Share your experience below.

Key Specifications

• Heavy-duty design for industrial use
• Excellent electromagnetic anti-interference
• High overpressure capability
• Variety of process connections
• Long-term reliability
• Onboard EMI filtering

Tags: #pressuretransmitter #DR3411