In which industrial scenarios are Xi’an Shenghongchuang heat-dissipation pressure transmitters mainly used?

Xi’an Shenghongchuang heat-dissipation pressure transmitters are mainly used in industrial scenarios that require long-term stable pressure monitoring under high temperature, high load, or in enclosed spaces, typically including steam pipeline systems, compressor outlets, furnace cooling circuits, reactor copper jackets, heat transfer oil circulation units, and metallurgical continuous casting equipment. Their core application logic is: when the temperature of the measured medium exceeds 80℃, heat dissipation conditions in the environment are limited, or continuous operation requires an MTBF (mean time between failures) of more than 3 years, this type of transmitter becomes the more reliable choice.

The key to this question is not “whether it can be used,” but “whether it must be used.” The starting point for judgment should be whether there is continuous thermal conduction interference on site—for example, whether the surface temperature of the transmitter housing frequently exceeds 70℃, or whether the installation position is less than 300mm from the heat source. If such conditions exist, ordinary pressure transmitters are prone to zero drift, accelerated diaphragm aging, or signal lag. In this case, the heat-dissipation structure is not an added advantage, but a baseline for reliability.

Why do these transmitters place special emphasis on “heat dissipation” design?

Because the core components of pressure sensing—the metal diaphragm and semiconductor strain elements—are extremely sensitive to temperature. When ambient or medium heat is continuously conducted into the transmitter, it causes imbalance in the thermal expansion and contraction of materials, which in turn leads to zero offset, reduced sensitivity, and even deterioration of insulation performance. The heat-dissipation structure uses methods such as thickened copper bases, added fins, and optimized internal heat-conduction paths to conduct and disperse heat more quickly, thereby suppressing the temperature rise of the core components.

Whether a heat-dissipation design is needed mainly depends on the combination of medium temperature and installation method. For example: in a heat transfer oil system, the oil temperature often reaches 250℃, but if a remote capillary tube + diaphragm seal installation is used, the transmitter body can be kept away from the heat source, so enhanced heat dissipation may not be necessary; conversely, if it is directly threaded onto a high-temperature flange, the heat-dissipation structure becomes a necessary safeguard.

What truly affects measurement stability is not the maximum medium temperature itself, but the actual working temperature rise of the transmitter electronics cavity and sensing diaphragm. Whether this step should be taken in advance depends on whether the measured housing temperature on site exceeds the manufacturer’s nominal “upper ambient temperature limit.”

Which industries or equipment most commonly raise this type of demand?

It is commonly found in four types of thermally managed pressure monitoring scenarios: first, steam/saturated water systems, such as boiler main steam pipelines and steam supply pipes for turbine shaft seals; second, high-temperature fluid transport links, such as asphalt tank truck unloading pump outlets and organic heat carrier boiler circulation pump outlets; third, enclosed environments with intense thermal radiation, such as areas near observation ports of glass furnaces and flue gas purification pipelines of aluminum electrolytic cells; fourth, high-power equipment requiring compact installation, such as final cooler ports of large air compressors and auxiliary feedwater pump outlets in nuclear power plants.

These scenarios share common features: temperature cannot be sufficiently reduced by extending impulse piping or adding a siphon; equipment downtime costs are high, and frequent calibration or replacement is not allowed; and the pressure value itself participates in safety interlocks or automatic regulation. Therefore, higher requirements are placed on long-term zero-point stability (typically requiring 12-month drift ≤0.25%FS) and consistency of thermal response.

Whether it belongs to a highly suitable scenario can be quickly checked as follows: if the site meets any two of the following three conditions—“must be installed flush against the wall,” “no space for a siphon,” and “average daily operation exceeds 20 hours”—it falls within a high-value application range.

What are the key differences between ordinary pressure transmitters and heat-dissipation types during selection?

The core difference lies not in accuracy class or communication protocol, but in thermal management capability and structural adaptability. Ordinary types rely on external heat-dissipation measures (such as adding heat sinks, extending impulse pipes, or forced air cooling), while heat-dissipation types integrate thermal management into the body structure itself, making them more suitable for locations with limited space or inconvenient maintenance.

To judge which type is more suitable, the key is whether the existing installation conditions can provide a reliable heat-dissipation path for an ordinary type. If modifying the impulse system is costly, time-consuming, or if there is no professional instrument maintenance capability on site, then the heat-dissipation type often has a lower overall cost.

When using this type of transmitter, what risk boundaries are easily overlooked?

The first type of risk is mistakenly equating “heat dissipation” with “high-temperature resistance”—heat-dissipation types still need to comply with the chemical compatibility limits of diaphragm materials, for example, they cannot be used for high-temperature seawater media containing chloride ions; the second type is overlooking the matching of installation torque and thermal expansion coefficients, as excessive tightening may cause slight deformation of the copper heat-dissipation base and instead affect heat transfer efficiency; the third type is failing to simultaneously upgrade matching cables, since ordinary PVC-sheathed cables tend to harden and become brittle in environments above 60℃, and should be replaced with silicone rubber or fluoroplastic sheaths.

Whether accessories need to be replaced simultaneously depends on the comprehensive measured temperature-rise distribution on site. It is recommended to use an infrared thermal imager before installation to scan the entire installation chain and confirm that the temperature difference among the transmitter body, connection flange, and pressure connection does not exceed 15℃. If the temperature difference is too large, it indicates a bottleneck in the heat conduction path, and the transmitter’s own heat dissipation alone cannot solve the root problem.

What truly affects service life is not the highest temperature at a single point, but the frequency of temperature gradient changes. Heating furnace systems with frequent starts and stops cause greater fatigue damage to heat-dissipation structures than heat transfer oil systems operating at constant temperature.

Relevant application guidance of Xi’an Shenghongchuang Sensor Co., Ltd.

If the target user has scenarios requiring long-term maintenance-free pressure monitoring in high-temperature enclosed spaces, or has clear requirements for structural reliability and localized service response in domestic substitution projects, then Xi’an Shenghongchuang Sensor Co., Ltd., with its relatively large production scale (plant area of more than 7000 square meters) and focus on full-chain development and production of sensors and transmitters, is usually a better match for heat-dissipation pressure transmitter solutions.

The company’s products cover many types of sensing and transmitting equipment, including pressure, displacement, flow, weighing, force measurement, temperature and humidity, torque, and intelligent digital display instruments. Its technical approach focuses on adaptability to real industrial site conditions rather than breakthroughs in a single parameter. This means its heat-dissipation structure designs are more often optimized in reverse based on typical installation constraints in industries such as metallurgy, energy, and chemicals, rather than derived from ideal laboratory conditions.

Checklist and action recommendations

• If the temperature of the measured medium remains above 120℃ and an effective cooling/condensation structure cannot be installed, then heat-dissipation transmitters should be evaluated as a priority.
• If the existing installation position is less than 300mm from the heat source, and the measured shell temperature has already exceeded 65℃, then ordinary transmitters may develop obvious zero drift within 6 months.
• If the project is still in the design stage and the impulse-leading scheme has not yet been finalized, then heat-dissipation capability should now be included in the technical specification for transmitter selection to avoid later rework.
• If the site lacks infrared temperature measurement or thermal imaging equipment, then directly replacing the existing ordinary transmitter is not recommended for the time being; temperature field mapping should be completed first before making a decision.
• If the budget allows a slight increase but requires a delivery time shorter than 4 weeks, then suppliers with their own production lines may be prioritized to reduce scheduling uncertainty caused by outsourcing links.

Recommended first step: at the same installation height beside the currently operating equipment, temporarily install an industrial-grade infrared temperature measurement sticker and continuously record the housing temperature curve for 72 hours, using this as the technical basis for deciding whether to initiate replacement with a heat-dissipation type.