What is the difference between explosion-proof and standard differential pressure transmitters?

In industrial automation, differential pressure transmitters are widely used for monitoring flow, liquid levels, and pressure. Depending on the operating environment, they are categorized into standard and explosion-proof models. While both measure differential pressure, they differ significantly in terms of safety protection, structural design, and scope of application. Understanding these differences helps enterprises balance measurement accuracy with on-site safety during selection, thereby avoiding hazards caused by improper choices.

Why is safety emphasized more in explosion-proof models?
Explosion-proof differential pressure transmitters are specifically designed—using methods such as intrinsic safety or flameproof enclosures—to mitigate risks like electrical sparks and overheating. Although standard transmitters can measure differential pressure, they generally lack the protection required for hazardous environments and thus cannot be used in high-risk areas involving chemicals, oil and gas, or combustible dust.

Do they share the same measurement principle?
In terms of measurement principles, both function the same way: they convert differential pressure into a standard electrical output signal. The real differences lie in housing protection, internal circuit safety design, and suitability for specific operating conditions; explosion-proof models are subject to stricter requirements in these areas.

What key factors should be considered during selection?
If the site is a standard workshop, pump room, or non-hazardous area, a standard differential pressure transmitter usually suffices and is more cost-effective. However, if the site involves combustible gases, vapors, dust, or specific hazardous area classification requirements, an explosion-proof model is mandatory. In such cases, parameters like the explosion-proof rating, installation method, medium temperature, and corrosiveness must also be considered.

When is an explosion-proof differential pressure transmitter essential?
In sectors such as petrochemicals, natural gas, pharmaceuticals, oil depots, and coal mining, explosion-proof differential pressure transmitters are often required whenever the environment is classified as a hazardous area. This is particularly important for equipment requiring continuous online operation in environments where ignition sources pose a risk, as explosion-proof models significantly enhance system safety.

Standard differential pressure transmitters meet routine measurement needs, whereas explosion-proof models handle safety-critical measurements in hazardous operating conditions. Anhui Exact specializes in the manufacturing and application of explosion-proof differential pressure transmitters, dedicated to providing safer and more reliable measurement solutions for industries such as petroleum and chemicals. For field applications requiring explosion-proof ratings and stable performance, selecting products from a specialized manufacturer is essential to ensuring operational safety and measurement accuracy.