I. Product Introduction

The FAK-158Ex is an intrinsically safe intelligent digital pressure module designed for high-accuracy pressure measurement in flammable and explosive environments. The module utilizes advanced microprocessor technology and silicon piezoresistive sensors. Each sensor is subjected to specialized aging, testing, and screening before assembly to ensure long-term stability. When used with an FAK260Ex or FAK273Ex handheld device, it forms a complete intrinsically safe pressure calibration and recording system. Its explosion-proof rating reaches Ex ia IIC T4 Ga, allowing safe use in Zone 0 areas where natural gas is continuously present.

During field implementation, technicians connect the 158Ex pressure module to the pilot valve of the pressure regulator or to pressure taps upstream/downstream of the valve. While simulating valve opening and closing actions, the 158Ex captures subtle pressure changes within the pipeline in real time and accurately records the peak pressure at the moment the valve actuates, thereby determining whether the pressure regulator is qualified.

II. Why Choose the 158Ex (Narrative Style)

In an explosive gas environment like natural gas, conventional electronic test instruments pose a risk of electrical sparks. Therefore, intrinsic safety is the bottom line for equipment selection. The 158Ex has obtained Ex ia IIC T4 Ga explosion-proof certification, meaning it will not create an ignition risk even when used in Zone 0 areas with continuously present natural gas, fundamentally ensuring the safety of personnel and facilities.

Meanwhile, natural gas pipeline pressure can reach as high as 3,000 psi or more, and the moment a valve closes is often accompanied by severe pressure surges. The 158Ex has a 1.2-times overpressure capability, allowing it to withstand these instantaneous pressure spikes without damage, ensuring that field operations are not interrupted by equipment failure.

Natural gas stations are located across the country, experiencing extreme temperature variations. The 158Ex features built-in full temperature compensation technology. Whether in the severe cold of minus 10°C in the northern winter or the surface temperature of 50°C in summer, the module maintains its specified accuracy without introducing additional measurement errors due to temperature changes.

Furthermore, the 158Ex comes with an ISO 17025 accredited calibration certificate and data. When used with the data recording function of the FAK260Ex, it can directly generate professional calibration reports that meet compliance audit requirements, helping stations satisfy equipment management and traceability regulations.

Based on the combined advantages of intrinsic safety, high-pressure tolerance, wide-temperature accuracy stability, and data traceability mentioned above, the 158Ex represents a reliable and compliant choice for pressure regulator maintenance scenarios in natural gas long-distance pipelines.

III. Extended Applications

Beyond the natural gas industry, the 158Ex is equally suitable for the following high-pressure measurement scenarios requiring intrinsic safety certification:

Petrochemical: Pressure monitoring and calibration in refinery units and tank farms.

Hydrogen Refueling Stations: Pressure testing in high-pressure hydrogen (IIC explosion-proof rating) environments.

Pharmaceutical and Chemical: Pressure monitoring of reactors involving flammable solvents.