Do you know when your pressure sensors are failing—or are you flying blind on 4-20mA alone?

$500,000 in Wasted Materials: How Hidden Sensor Failures Cost Us a Fortune

Our hydraulic press began cycling slower one night, yet the gauge showed normal pressure. The parts coming off the line were out of spec, leading to significant production delays and wasted materials. In fact, we were losing thousands of dollars per shift due to undetected sensor drift. This specific incident cost us $500,000 in just one year—a staggering figure that could have been avoided with proper diagnostics.

What SCADA Didn’t Tell Us About Our Sensor Health

We assumed that since the gauge read normal, the sensors were functioning correctly. However, 4-20mA analog signals alone cannot indicate sensor health; they only transmit the measured pressure. Sensor degradation—such as zero drift, span errors, or electrical noise—often goes unnoticed until it causes catastrophic failure. This is because analog loops lack a digital channel for diagnostics. Consequently, we were flying blind, relying on a single variable that masked underlying issues.

How DR3452 Solved Our Hidden Failure Problem

We upgraded to DR3452 HART pressure transmitters across critical points in the system. These smart pressure sensors overlay digital data on the same two wires used for 4-20mA, providing real-time health checks and diagnostic information. For example, the DR3452 can report secondary variables like sensor temperature and loop current, enabling early detection of degradation. The installation was straightforward—an easy upgrade path for existing 4-20mA loops—and we could remotely configure and diagnose each device using standard HART communicators.

Can You Afford to Keep Flying Blind on Sensor Health?

By integrating DR3452 transmitters, we identified several failing sensors that had been giving false readings. This prevented further production issues and saved $500,000 annually in wasted materials and downtime. Moreover, we gained confidence in our process data, improving overall equipment effectiveness. How are you managing your sensor health in a smart plant? If you rely solely on 4-20mA, you may be missing critical diagnostics that could save your bottom line.

Key Specifications

• 4-20mA analog with HART digital communication
• Remote configuration and diagnostics
• Access to secondary variables
• Compatible with standard HART communicators
• Easy upgrade path for existing 4-20mA loops

Closing Question
Are you ready to stop flying blind? Consider upgrading to a HART pressure transmitter to gain full visibility into your sensor health and avoid costly surprises.

Tags: #HARTpressuretransmitter #smartpressuresensor #4-20mAwithHARTdiagnostics #DR3452