Fisher C1 controllers and transmitters continue the tradition of durable and dependable Fisher pressure instrumentation, while addressing air/gas consumption concerns. The C1 is used wherever durable and dependable pressure instrumentation is required.
The Fisher™ C1 Pneumatic Controller and Transmitter upholds Fisher’s legacy of building durable and reliable pressure management instruments, now engineered to address modern concerns about air/gas consumption and operational efficiency. It is designed for demanding applications across the chemical processing, and oil and gas production industries, delivering precise control while significantly reducing operating costs.
🎯 Superior Accuracy & Reliable Control
Experience precise pressure management with an accuracy of ±0.50% of span (independent linear). The C1 ensures reliable performance in modulating or on/off control applications, maintaining process stability even in harsh conditions.
💸 Dramatically Reduced Operating Costs
The innovative design of the C1 can slash steady-state air/gas consumption to as little as one-tenth of previous generation products. Its consumption rate is well below the 6 scfh benchmark set by the U.S. Environmental Protection Agency for the oil and gas sector, making it an outstanding energy-saving solution that boosts your bottom line.
🛡️ Built for Demanding Environments
Constructed with a robust housing (standard aluminum alloy or optional stainless steel) and boasting protection ratings of IP66/IP67, the C1 is built to last. It is also available in specific materials compliant with NACE MR0175/ISO 15156 standards for handling sour process fluids.
🔧 Flexible Installation & Configuration
The unit offers versatile mounting options—directly on valve actuators, on panels, walls, or pipe-stands. Its design allows for easy field reversal from direct to reverse action without extra parts, and it can be configured for Proportional (P), Proportional-Integral (PI), or Differential Gap control modes.
📊 Advanced Diagnostics & Signal Options
With real-time valve health monitoring and performance diagnostics, the C1 supports various signal inputs, including 4-20 mA HART communication, facilitating integration into modern control systems.
| Specification Category | Details |
|---|---|
| Input Signal | Pneumatic, 4-20 mA DC |
| Max. Output Pressure | 40 psig / 145 psig (10 bar) |
| Accuracy | ± 0.50% of span |
| Environmental Rating | IP66/IP67 |
| Temperature Range | -40 °C to 85 °C (-40 °F to 185 °F) |
| Supply Voltage | 24V DC |
| Certifications | ATEX, CUTR |
The Fisher C1 is perfectly suited for a wide range of critical pressure control tasks, including:
Offshore Oil & Gas Pressure Control
Chemical Process Industries
Natural Gas Production and Distribution






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KateTeco (Tianjin) Technology Co., Ltd. serves as an outstanding partner in the field of industrial fluid automation, specializing in the introduction and integration of high-end valves and instruments. We are committed to providing customers with safe, reliable, and intelligent system solutions. By leveraging global leading product resources and supported by systematic professional training and on-site technical assistance from Emerson’s experienced engineers, we ensure that customers can respond promptly and accurately to technical challenges.
With full lifecycle services covering installation, commissioning, operation, maintenance, and replacement, we deliver a true one-stop service system. This allows our customers to enjoy seamless, efficient, and high-quality assurance, supporting enterprises in achieving stable operation and continuous upgrades.


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