SX15DN Pressure Sensor Equivalent & Substitute Parts

Part Overview

The SX15DN is a differential pressure sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for board mount applications requiring 15PSI (103.42kPa) differential pressure measurement. The sensor outputs a Wheatstone Bridge signal in the range of 0 mV to 110 mV at 5V supply voltage with ±0.5% accuracy. The product is currently obsolete, making identification of compatible substitute components essential for system maintenance, repair, and redesign applications. The SX15DN features a male barbed port configuration with 0.19" (4.8mm) tube connections and operates across the industrial temperature range of -40°C to 85°C.

Substiute Parts

SX15DN

Honeywell Sensing and Productivity SolutionsIn Stock: 1049SX15DN Datasheet

Current PartRFQ

NSCSHHN015PDUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 961NSCSHHN015PDUNV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SX15DN is determined by the following critical parameters that must align with the original design specifications:

Pressure Measurement Capability: The substitute must support differential pressure measurement at ±15PSI (±103.42kPa) operating range. The SX15DN operates at 15PSI unidirectional; the NSCSHHN015PDUNV operates at ±15PSI bidirectional, which encompasses the original operating range.

Output Signal Type: Both the main part and substitute utilize Wheatstone Bridge output configuration, ensuring signal conditioning compatibility with existing measurement circuits.

Electrical Interface: The SX15DN requires 12V supply voltage. The NSCSHHN015PDUNV accepts 1.5V to 12V supply range, providing backward compatibility with the original 12V specification.

Mechanical Interface: Port configuration must accommodate the pneumatic connections. The SX15DN uses 0.19" (4.8mm) male barbed dual ports; the NSCSHHN015PDUNV uses 0.16" (3.94mm) male barbed dual ports. Both employ barbed port style and dual port configuration on the same side, requiring adapter consideration for tube diameter transition.

Package and Mounting: Both components use 4-SIP through-hole mounting, ensuring PCB compatibility without redesign of mounting footprints.

Environmental and Compliance: Both parts operate across -40°C to 85°C temperature range, maintain RoHS compliance, and carry MSL 1 rating, meeting industrial reliability requirements.

Parameter Comparison

Engineering Selection Recommendations

The NSCSHHN015PDUNV is the identified substitute for the obsolete SX15DN based on the following engineering criteria:

Product Status and Availability: The SX15DN is obsolete with no ongoing manufacturing. The NSCSHHN015PDUNV is an active product from the same manufacturer, ensuring long-term availability and supply chain continuity for new production and field replacements.

Pressure Measurement Alignment: The NSCSHHN015PDUNV operates at ±15PSI differential pressure, which encompasses the original SX15DN operating range of 15PSI unidirectional. The bidirectional capability of the substitute provides equivalent measurement performance for the specified pressure range.

Electrical Compatibility: Both sensors utilize Wheatstone Bridge output and operate at 12V supply voltage. The NSCSHHN015PDUNV accepts a wider supply range (1.5V to 12V), maintaining full compatibility with existing 12V power supplies.

Signal Output Consideration: The output span differs between parts (110 mV versus 155 mV at 5V). System signal conditioning and analog-to-digital conversion firmware must be adjusted to accommodate the different output scaling. This is a calibration-level change, not a functional incompatibility.

Mechanical Interface: Both sensors employ barbed male dual ports on the same side. The port diameter differs (0.19" versus 0.16"), requiring pneumatic adapter tubing or fittings to maintain existing hose connections. This is a mechanical accommodation, not a functional limitation.

Compliance and Reliability: Both parts maintain RoHS compliance, MSL 1 rating, and identical operating temperature range (-40°C to 85°C), ensuring equivalent environmental performance and regulatory compliance.

Accuracy Enhancement: The NSCSHHN015PDUNV provides ±0.25% accuracy compared to the SX15DN's ±0.5%, representing an improvement in measurement precision.

Frequently Asked Questions (FAQ)

Q: Can the NSCSHHN015PDUNV directly replace the SX15DN without any modifications?

A: The NSCSHHN015PDUNV is functionally equivalent for pressure measurement but requires two accommodations: (1) Signal output scaling adjustment in firmware or signal conditioning circuits due to different output span (110 mV versus 155 mV), and (2) Pneumatic adapter tubing for port diameter transition from 0.19" to 0.16". The PCB footprint and electrical interface are compatible without modification.

Q: What is the difference between the unidirectional 15PSI of the SX15DN and the bidirectional ±15PSI of the NSCSHHN015PDUNV?

A: The SX15DN measures pressure in one direction only (0 to 15PSI). The NSCSHHN015PDUNV measures pressure bidirectionally (−15PSI to +15PSI). For applications using only positive pressure measurement, the NSCSHHN015PDUNV operates within its specified range and provides equivalent performance. The bidirectional capability does not affect unidirectional measurement accuracy.

Q: Are there any supply voltage compatibility issues?

A: No. The SX15DN operates at 12V fixed supply. The NSCSHHN015PDUNV accepts 1.5V to 12V supply range, making it fully compatible with existing 12V power supplies. The substitute can be powered directly from the original power circuit without modification.

Q: How does the output signal difference affect system integration?

A: The SX15DN outputs 0 to 110 mV at 5V supply; the NSCSHHN015PDUNV outputs 0 to 155 mV at 5V supply. This difference requires recalibration of analog-to-digital conversion scaling factors and signal conditioning gain settings. The Wheatstone Bridge output type remains identical, so no signal conditioning topology changes are necessary.

Q: What is the maximum pressure rating difference, and does it affect the application?

A: The SX15DN has a maximum pressure rating of 45PSI; the NSCSHHN015PDUNV has ±30PSI. If the application operates below 30PSI, the substitute is fully adequate. If the application requires overpressure protection above 30PSI, the substitute's lower maximum pressure rating must be evaluated against system safety requirements.

Q: Are both sensors RoHS compliant and suitable for regulated industries?

A: Yes. Both the SX15DN and NSCSHHN015PDUNV are RoHS compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both meet industrial reliability and environmental compliance standards. The NSCSHHN015PDUNV, being an active product, maintains current compliance certifications.

Q: What is the port diameter difference, and how is it accommodated?

A: The SX15DN uses 0.19" (4.8mm) barbed ports; the NSCSHHN015PDUNV uses 0.16" (3.94mm) barbed ports. Standard pneumatic adapter tubing or stepped barbed fittings are available to transition between these diameters. This is a standard mechanical accommodation in pneumatic system design.

Q: Does the improved accuracy of the NSCSHHN015PDUNV (±0.25% versus ±0.5%) require system recalibration?

A: The improved accuracy is a benefit that does not require recalibration. If the original system was designed around ±0.5% accuracy, the substitute's ±0.25% accuracy provides better performance. If tighter accuracy is required, the substitute supports this requirement without additional modifications.