Nexisense Explosion-Proof Pressure Transmitter: Safety Advantages in Flammable and Explosive Environments

In high-risk industrial fields such as petrochemical processing and natural gas extraction, equipment safety is the core of production continuity and personnel protection. Nexisense explosion-proof pressure transmitters, with rigorous flameproof design and high reliability, provide accurate pressure measurement in explosive environments, helping enterprises effectively control risks and ensure stable process control.

Overview of Explosion-Proof Pressure Transmitters

Explosion-proof pressure transmitters are specifically designed for hazardous areas. Their enclosures are capable of withstanding internal explosions without transmitting them to the external environment. Nexisense products achieve an explosion protection rating of Ex d IIC T6 Gb and are suitable for Zone 1 and Zone 2 areas containing explosive gas mixtures. This design strictly complies with international explosion-proof standards, structurally isolating potential ignition sources and ensuring that the device does not become an ignition point.

In flammable and explosive scenarios, ordinary sensors may trigger accidents due to sparks or high temperatures. Explosion-proof transmitters, through thick enclosures and precise flamepath gap control, achieve safe operation and have become standard equipment in the oil, gas, and chemical industries.

Measurement Methods and Working Principles

Nexisense explosion-proof pressure transmitters use diffused silicon or ceramic piezoresistive sensing elements as sensitive components. The process pressure acts on an isolation diaphragm and is transmitted to the sensing element, causing resistance changes. These changes are converted into electrical signals via a Wheatstone bridge, then amplified and compensated to output a standard 4–20 mA signal.

An integrated digital temperature compensation module automatically corrects temperature drift, ensuring accuracy across a wide temperature range. The measurement process includes pressure sensing, signal conversion, and anti-interference processing, supporting remote transmission to DCS or PLC systems. This method operates stably under high pressure and highly corrosive media, with fast response, making it suitable for dynamic process monitoring.

Main Advantage Analysis

Nexisense explosion-proof pressure transmitters demonstrate outstanding advantages in flammable and explosive environments. First, safety performance is industry-leading: the flameproof enclosure prevents internal sparks from escaping, eliminating ignition risks. Second, strong environmental adaptability: equipped with lightning protection, radio-frequency and electromagnetic interference resistance, as well as shock resistance, vibration resistance, and corrosion resistance, enabling operation under complex field conditions.

Digital temperature compensation expands the operating range and prevents environmental fluctuations from affecting accuracy. Strong overload capability reduces failure rates. These features not only enhance measurement reliability but also reduce overall system risk, supporting long-term continuous operation.

Compared with intrinsically safe types, explosion-proof transmitters are suitable for higher-power applications and offer more flexible installation and maintenance, providing more comprehensive protection in high-risk areas.

Expanded Application Scenarios

Explosion-proof pressure transmitters are widely used in petrochemical process control, such as pressure monitoring of reactors and storage tanks, ensuring process safety. In natural gas extraction and pipeline transmission, they provide real-time pressure data to prevent leaks or overpressure.

Other scenarios include coal mine gas monitoring, pharmaceutical handling of explosive solvents, and military fuel systems. Nexisense products have accumulated extensive application cases in oilfield platforms and chemical industrial parks, helping users achieve precise control and rapid emergency response.

Detailed Technical Parameters

Typical parameters of Nexisense explosion-proof pressure transmitters include a measurement range of 0–100 MPa (customizable), accuracy of ±0.25% FS, and non-linearity < 0.1% FS. Output is 4–20 mA two-wire (HART optional), with power supply of 12–36 VDC.

Explosion protection rating is Ex d IIC T6 Gb, ingress protection IP67, operating temperature from −40°C to 80°C (high-temperature versions available). Overload capacity is 200% FS, response time < 10 ms. Wetted material is 316L stainless steel, with process connections G1/2 or M20×1.5. Selection should consider media compatibility and installation environment to ensure optimal performance.

Installation and Maintenance

Installation should be carried out in a non-explosive environment. Use explosion-proof cable glands for sealed connections to avoid damage to the enclosure. After fixing, check grounding and verify the loop before powering on.

For maintenance, inspect enclosure integrity and cable sealing quarterly. Clean media-contact surfaces with neutral detergents. Calibrate zero and span annually using a standard source, verifying deviation < 0.5% FS. In humid or dusty environments, add protective covers. Regularly inspect flameproof gaps to prevent corrosion from affecting safety.

Nexisense products are designed for ease of maintenance, reducing downtime and extending service life.

FAQ

What is the difference between explosion-proof and intrinsically safe protection?
Explosion-proof protection isolates explosions through the enclosure, while intrinsic safety limits energy to prevent sparks; they are suitable for different power levels and hazardous zones.

Can it be used in Zone 1 areas?
Yes, the Ex d IIC T6 Gb rating supports operation in Zone 1 hazardous areas.

How is lightning risk handled?
Built-in lightning protection modules combined with site lightning protection systems provide multiple layers of protection.

How does temperature compensation work?
Digital algorithms perform real-time correction to ensure stable accuracy across a wide temperature range.

Conclusion

With stringent safety design and comprehensive adaptability, Nexisense explosion-proof pressure transmitters demonstrate significant advantages in flammable and explosive environments. From measurement principles to practical applications, they provide reliable support for industries such as petrochemicals. Choosing appropriate explosion-proof equipment not only ensures production continuity but also safeguards personnel safety. It is recommended to conduct professional selection based on site conditions and emphasize standardized maintenance to promote higher levels of industrial safety.