SX15ASMT Pressure Sensor: Equivalent & Substitute Parts

Part Overview

The SX15ASMT is a surface-mount pressure sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for absolute pressure measurement applications up to 15 PSI (103.42 kPa). The device features an 8-SMD module package with a Wheatstone Bridge output configuration and operates across a temperature range of -40°C to 125°C. The product is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations where similar functionality is required.

Substiute Parts

SX15ASMT

Honeywell Sensing and Productivity SolutionsIn Stock: 953SX15ASMT Datasheet

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NBPDANS015PGUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 971NBPDANS015PGUNV Datasheet

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NBPDLNN015PAUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 846NBPDLNN015PAUNV Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SX15ASMT is determined by the following critical parameters:

Pressure Measurement Characteristics:

• Operating pressure rating of 15 PSI (103.42 kPa)
• Absolute pressure type measurement
• Maximum pressure tolerance of 30 PSI (206.84 kPa)

Electrical Output Specifications:

• Wheatstone Bridge output configuration
• Output voltage range compatibility with 5V supply systems
• Accuracy within ±0.25% or better

Environmental and Operating Conditions:

• Operating temperature range of -40°C to 125°C
• Supply voltage compatibility (1.8V to 12V range acceptable)

Mechanical Interface:

• Male tube port connection
• Barbless or barbed port styles acceptable for absolute pressure applications

Packaging and Integration:

• Board-mount applications
• Through-hole or surface-mount termination styles

The substitute parts identified maintain the core pressure measurement function and electrical output characteristics while accommodating variations in package style, port geometry, and termination method. These variations do not compromise the fundamental pressure sensing capability required for equivalent system operation.

Parameter Comparison

Engineering Selection Recommendations

NBPDLNN015PAUNV Selection Criteria:

The NBPDLNN015PAUNV is a direct functional equivalent for absolute pressure measurement applications. Both the SX15ASMT and NBPDLNN015PAUNV measure absolute pressure at 15 PSI with identical maximum pressure ratings and operating temperature ranges. The NBPDLNN015PAUNV offers improved RoHS compliance status and maintains Wheatstone Bridge output configuration. The primary design consideration is the transition from surface-mount (8-SMD) to through-hole (4-DIP) termination, which requires PCB layout modification. The NBPDLNN015PAUNV supports a wider supply voltage range (1.8V to 12V) compared to the fixed 12V requirement of the SX15ASMT, providing greater system flexibility. Port size differs (0.13" versus 0.08"), necessitating mechanical interface verification. Both parts are classified as obsolete, indicating limited future availability.

NBPDANS015PGUNV Selection Criteria:

The NBPDANS015PGUNV operates at the same 15 PSI pressure rating with identical maximum pressure and temperature specifications. This part is currently active in production, ensuring ongoing availability and supply chain stability. The NBPDANS015PGUNV is RoHS compliant, addressing regulatory requirements. The critical distinction is the pressure type: NBPDANS015PGUNV measures vented gauge pressure rather than absolute pressure. This substitution is applicable only in applications where gauge pressure measurement is functionally equivalent to absolute pressure measurement. The through-hole termination and barbed port style require PCB and mechanical interface redesign. The wider supply voltage range (1.8V to 12V) provides operational flexibility.

Compliance and Availability Considerations:

Selection between substitute parts should prioritize RoHS compliance requirements for new designs. The NBPDANS015PGUNV, as an active product, provides superior long-term supply assurance. The NBPDLNN015PAUNV maintains absolute pressure measurement capability but shares obsolete status with the original SX15ASMT. Both substitutes require termination style and port geometry accommodation in system design.

Frequently Asked Questions (FAQ)

Q: Can the NBPDLNN015PAUNV directly replace the SX15ASMT without circuit modification?

A: The NBPDLNN015PAUNV maintains identical pressure measurement function and Wheatstone Bridge output, but requires PCB redesign due to termination style change from SMD (SMT) Tab to PC Pin through-hole configuration. The wider supply voltage range (1.8V to 12V) is compatible with the original 12V supply. Port size difference (0.13" versus 0.08") requires mechanical interface verification.

Q: What is the functional difference between the SX15ASMT and NBPDANS015PGUNV?

A: The SX15ASMT measures absolute pressure, while the NBPDANS015PGUNV measures vented gauge pressure. Absolute pressure measurement references a perfect vacuum, whereas gauge pressure references atmospheric pressure. These measurement types produce different output values for identical physical pressure conditions. Substitution is valid only when the application can function with gauge pressure measurement instead of absolute pressure measurement.

Q: Why does the NBPDANS015PGUNV have lower accuracy (±0.25%) compared to the SX15ASMT (±0.05%)?

A: Accuracy specifications are determined by sensor design and manufacturing processes. The NBPDANS015PGUNV's ±0.25% accuracy is within acceptable tolerance for most industrial pressure measurement applications. System-level accuracy requirements should be evaluated against the specific application demands.

Q: Are the port size differences between substitute parts critical?

A: Port size differences (0.08", 0.13", and 0.75" tube diameters) affect mechanical interface compatibility. Tubing connections must match the specified port size. Mismatched port sizes result in improper sealing and potential system failure. Mechanical interface redesign is required when substituting parts with different port sizes.

Q: What is the impact of changing from surface-mount to through-hole termination?

A: Surface-mount (SMD) termination requires solder reflow processes and surface-mount assembly equipment. Through-hole (PC Pin) termination uses wave soldering or manual soldering processes. PCB layout, assembly procedures, and equipment differ significantly between these termination styles. Design and manufacturing process changes are necessary when transitioning between termination types.

Q: Is the NBPDLNN015PAUNV still available for new designs?

A: The NBPDLNN015PAUNV is classified as obsolete. While inventory may be available from distributors, long-term supply assurance is not guaranteed. For new designs requiring extended product lifecycle support, the active NBPDANS015PGUNV is the preferred choice, provided gauge pressure measurement is functionally acceptable.

Q: How does the output voltage range difference affect system design?

A: The SX15ASMT outputs 0 mV to 112.5 mV, while both substitute parts output 0 mV to 75 mV. This difference affects signal conditioning and analog-to-digital conversion scaling. System firmware or analog signal processing circuits require recalibration to accommodate the different output ranges.