CAP-DP Diffused Silicon Differential Pressure Transmitter RS485 420mA for Oil Chemical Water

CIPPUS CAP-DP series differential pressure transmitter stands out as a high-performance solution optimized for modern industrial measurement demands. Engineered with premium silicon pressure-sensitive chips and integrated circuit design, it provides fast response, high sensitivity, and reliable long-term operation without frequent calibration. Its compact and rugged structure enables resistance to vibration, shock, and harsh media corrosion, greatly extending service life.

The transmitter supports flexible installation and convenient on-site debugging, effectively reducing maintenance costs and improving system stability. With high anti-interference capability and wide operating temperature range, it performs steadily in complex working conditions such as water treatment, petroleum, chemical engineering, and power plants. Combining high precision, strong adaptability, and cost efficiency, it is the preferred choice for accurate differential pressure monitoring and intelligent industrial control systems.

Our Diffused Silicon Differential Pressure Transmitter is engineered as a rugged, precision-focused solution tailored to the extreme demands of the petrochemical industry, addressing key pain points like corrosive media, temperature fluctuations, and explosive hazards. Built with a high-purity diffused silicon sensing core optimized via MEMS technology, it delivers exceptional measurement accuracy (±0.05% FS) and ultra-low long-term drift (≤0.1% FS/year), ensuring reliable data for critical processes such as crude oil refining, natural gas processing, and chemical synthesis.​

What makes it indispensable for petrochemical applications is its superior environmental resilience. The contact medium parts adopt Hastelloy C-276 or 316L stainless steel diaphragms, paired with PTFE seals, forming a robust barrier against corrosive substances like H₂S, chlorine, and acidic/alkaline fluids . Certified with ATEX Ex ia IIC T4 intrinsic safety and Ex d flameproof ratings, it operates safely in Zone 0/1 hazardous areas, while the IP67/IP68 protection grade prevents dust and moisture intrusion in harsh plant environments . Its wide operating temperature range (-40℃ to 125℃) and integrated laser-calibrated temperature compensation system eliminate errors caused by extreme heat or cold in distillation towers, reaction kettles, and pipeline networks .​

Designed for industrial efficiency, this transmitter features a rugged all-welded structure that withstands high pressure (up to 42MPa static pressure) and mechanical vibration, avoiding leakage risks in high-load scenarios like offshore drilling platforms. It supports flexible signal output (4–20mA analog + HART protocol) for seamless integration with DCS/PLC systems, enabling remote parameter configuration and predictive maintenance—reducing on-site calibration downtime by 60% . The anti-overload design (up to 5x full scale) and electromagnetic interference (EMI) shielding protect against pressure surges and electrical noise from industrial equipment, ensuring stable output even in complex process conditions .​

From upstream oil extraction to downstream chemical processing, this transmitter excels in flow measurement, level monitoring, and pressure control of gases, liquids, and vapors. It minimizes unplanned shutdowns, lowers maintenance costs, and enhances operational safety—making it the preferred choice for petrochemical enterprises seeking precision, durability, and compliance with industry standards. Its compact design and versatile mounting options (flange, thread, bracket) further adapt to space-constrained installations, delivering consistent performance across refineries, chemical plants, and offshore platforms.