Product Description
The FOXBORO 13A-MS2 is a pneumatic differential pressure (d/p Cell) transmitter from the highly regarded Foxboro 13A series. These transmitters, now part of Schneider Electric, are renowned for their robust and reliable performance in the process industry. This specific model measures differential pressure and then converts it into a standard pneumatic output signal, typically 3-15 psi (pounds per square inch), for transmission to receiving instruments or control systems located remotely.
The “MS2” in the model code indicates specific characteristics of the transmitter’s capsule and range. The “M” refers to a medium-range capsule, designed for applications where the differential pressure falls within a moderate span. The “S2” or similar suffixes define the specific span limits and the materials of construction for the wetted parts. The FOXBORO 13A-MS2 is commonly used in flow measurement (often with orifice plates), liquid level, and other differential pressure applications where pneumatic instrumentation is preferred due to safety requirements in hazardous areas, or for integration into existing legacy pneumatic control loops. It offers excellent span adjustability and zero suppression/elevation capabilities within its designated range, providing flexibility for diverse industrial processes. The transmitter features a durable construction, typically with 316 Stainless Steel wetted parts, to ensure longevity in various process environments.
Product Parameters
The FOXBORO 13A-MS2 possesses the following key technical specifications:
| Parameter | Specification |
|---|---|
| Transmitter Type | Pneumatic Differential Pressure Transmitter (d/p Cell) |
| Series | 13A Series (Medium Range Capsule) |
| Measured Variable | Differential Pressure ($\Delta$P) |
| Output Signal | 3 to 15 psi (or 20 to 100 kPa, 0.2 to 1.0 bar, as specified) |
| Supply Pressure | Typically 20-30 psi (verify specific tag for exact required supply) |
| Range (MS2) | Typically 0-250 inH2O (inches of water column) for the ‘M’ capsule. Specific ‘S2’ configuration will define exact span limits within this range. (Example: Span limits 20-250 inH2O) |
| Static Pressure Limit | Up to 14 MPa (2000 psi) (for Model 13A, ‘M’ capsule) |
| Accuracy | $\pm$0.5% of span (for spans between 20-525 inH2O) |
| Repeatability | 0.1% of span |
| Dead Band | 0.05% of span |
| Air Consumption | 0.42 m$^3$/h (0.25 cfm) at standard conditions |
| Wetted Parts Material | Commonly 316 Stainless Steel (SS) for both body and capsule. Other options may exist based on full part number. |
| Housing Material | Blue, high-impact, glass-filled polycarbonate cover (typical for topworks) |
| Environmental Protection | IP53 (IEC 60529), NEMA 3 (raintight) |
| Operating Temperature | to $+120^\circ$C ( to $+250^\circ$F) (body temperature) |
| Mounting | Direct to process piping or onto a nominal DN 50 (2-inch) pipe (bracket supplied) |
| Process Connections | Typically (2) 1/2 inch NPT (Female Pipe Thread) |
| Air Connections | 1/4 NPT |
| Approximate Mass | 8.5 kg (19 lb) (typical for 13A Series with ‘M’ capsule) |
Advantages and Features
The FOXBORO 13A-MS2 offers several advantages and features, cementing its legacy as a reliable choice for pneumatic differential pressure measurement:
- Proven Reliability: Foxboro d/p Cell transmitters have a long track record of durable and accurate performance in harsh industrial settings, ensuring consistent operation.
- Pneumatic Output: Generates a standard 3-15 psi pneumatic signal, which is intrinsically safe for hazardous or explosive environments, making it ideal where electrical signals are undesirable or restricted. It seamlessly integrates into existing pneumatic control infrastructure.
- Versatile Measurement: Perfectly suited for common process measurements such as liquid level (in open or closed vessels), flow (using primary flow elements like orifice plates), and general differential pressure monitoring.
- Wide Span Adjustability: Features broad zero suppression and elevation capabilities, allowing precise customization of the measurement range within the ‘M’ capsule’s limits to match specific process requirements.
- Robust Construction: Built with durable materials like 316 Stainless Steel for wetted parts, ensuring chemical compatibility with various process fluids and a long operational lifespan.
- Easy Maintenance: The modular design, including a field-replaceable capsule and easily accessible topworks, simplifies maintenance and reduces overall service costs. Shared parts with other Foxboro pneumatic transmitters can minimize spare parts inventory.
- High Static Pressure Rating: Designed to withstand high line pressures (up to 2000 psi), making it suitable for high-pressure process applications.
- Environmental Durability: The housing provides strong environmental protection (IP53/NEMA 3), making it resistant to dust and various weather conditions.
