Overview
The Watson Smith Type 423 I-P converter is a failsafe electronic current-to-pressure converter that converts analog input signals into proportional pneumatic pressure output. This proportional I-P converter uses advanced electronic control to deliver high performance and repeatability in industrial automation and process control systems. Each unit undergoes rigorous factory testing and includes an individual test certificate documenting linearity, hysteresis, accuracy, and response characteristics.
Key Features
- Proportional electronic control for stable, responsive performance
- Failsafe design suitable for critical control applications
- Individual factory test certificate included with each unit
- Low maintenance with high stability and reliability
- Suitable for general industrial and hazardous-area applications (ATEX available)
- Compact design with integral mounting bracket
Technical Specifications
Electrical & Pneumatic Parameters:
- Power Supply: 12–24 V DC
- Maximum Supply Pressure: 205 psig (14 bar)
- Output Pressure Feedback: 0–10 V full range (user-configurable)
- Total Error: <±1% of span (independent error)
- Weight: Approximately 1.76 lbs (800 g)
- Mounting: Integral surface-mounting bracket, preferred vertical orientation
- Certifications: CE marked; ATEX Type N (Ex N ii T6) and intrinsically safe (Eex ia · IIC T5) options available
Factory Testing: Linearity, hysteresis, total error, settling error, air consumption, response time, calibration, insulation, start-up current, supply sensitivity, and voltage load.
Typical Applications
- Proportional pneumatic valve control in industrial automation
- Pressure regulation and monitoring in process systems
- Flow control in manufacturing and material handling
- Natural gas and hazardous-area applications (with appropriate certifications)
- HVAC and building automation pneumatic systems
- Test and measurement equipment
Compatibility & Replacements
Compatible With
- Industrial pneumatic control systems requiring 12–24 V DC supply
- PLC and DCS analog output modules (0–10 V, 4–20 mA)
- Proportional pressure control loops in manufacturing automation
- Systems requiring feedback signal monitoring (0–10 V)
Replaces / Drop-In Replacement For
- Watson Smith 3M001292 (original part number)
- Watson Smith 53A00100 (alternate designation)
- Legacy pneumatic I-P converter models in Type 423 series
Works With
- 4–20 mA analog signal inputs
- 0–10 V analog signal inputs
- Proportional directional valve solenoids
- Pressure reducing and control valves
- Standard pneumatic tubing and fittings
