High Temperature Pressure Transmitter with Cooling Element

The Problem: Hidden Process Lag Despite Normal Readings

Our steam loop was critical for the chemical reactor. However, the process was lagging. This happened even though the gauge showed a steady 1 bar. The heating system simply was not transferring heat well. As a result, downtime cost us $25,000 each month.

Why Standard Transmitters Fail in High Heat

Standard electronics fail above 85°C. Yet the media inside our loop could reach 300°C without issue. Our existing transmitters kept overheating and failing. We could not afford this risk because production runs on tight margins. After months of troubleshooting, we finally found the problem. Heat was cooking the transmitter’s electronics until they broke. We had replaced them three times. Still, the same reading drift appeared after just two weeks.

Root Cause: Thermal Conduction

The root cause was thermal conduction through the process connection. This raised internal temperatures beyond the limits of standard electronics. This is a common issue in high-temperature processes. Media temperatures often exceed 150°C. Unfortunately, many pressure transmitters lack proper thermal isolation.

The Solution: A Dedicated High Temperature Pressure Transmitter

We installed the DR3417 high temperature pressure transmitter. Its built-in cooling element physically separates the electronics from the hot media. As a result, it ensures reliable readings even at 300°C. The cooling element uses a heat sink and an isolation diaphragm. Together, they dissipate heat and keep electronics below 85°C.

Results: Less Downtime and Major Savings

Within one week of installation, our reactor began heating as expected. Downtime costs dropped from $25,000tojust$5,000 per month. In other words, the high temperature pressure transmitter paid for itself almost immediately.

Key Specifications

• High temperature media compatibility: The DR3417 handles media temperatures from -40°C to 150°C, with the cooling element allowing process temperatures up to 300°C without damaging the electronics.
• Cooling element for electronics protection: A robust thermal barrier ensures the electronics remain within safe operating limits, preventing drift and failure.
• Stable performance in thermal cycles: The design compensates for thermal expansion and contraction, maintaining accuracy across repeated heating and cooling cycles.
• Rugged stainless steel construction: The housing resists corrosion and mechanical stress, suitable for harsh industrial environments.
• Standard 4-20mA output: Easy integration with existing PLCs and SCADA systems.

This high temperature pressure transmitter solved our thermal protection challenge. Compared to alternatives like remote mount transmitters or heat tracing, the DR3417 offered a simpler, more reliable solution without additional installation complexity. For example, remote mounts require extra piping and calibration, while heat tracing adds energy costs and maintenance. The DR3417’s integrated design eliminated these issues.

How many transmitters have you lost to heat damage in high-temperature processes? If you’re facing similar challenges, consider a transmitter with a cooling element to protect your electronics and reduce downtime.

For more on thermal management in industrial instrumentation, see [ISA’s guide on temperature effects](https://www.isa.org) and [Control Engineering’s article on pressure transmitter selection](https://www.controleng.com).

Tags: #hightemperaturepressuretransmitter #coolingelement #thermalprotection #DR3417