SX150DN Pressure Sensor Equivalent & Substitute Parts

Part Overview

The SX150DN is a differential pressure sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for board mount applications requiring 100 PSI (689.48 kPa) differential pressure measurement. The sensor outputs a 0 mV to 110 mV signal across a 5V supply and features a Wheatstone Bridge output configuration with dual barbed male ports (0.19" / 4.8mm tube).

The SX150DN is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality, ensure supply chain continuity, and support legacy equipment maintenance where direct replacement availability is limited.

Substiute Parts

SX150DN

Honeywell Sensing and Productivity SolutionsIn Stock: 975SX150DN Datasheet

Current PartRFQ

NSCSHHN150PDUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 990NSCSHHN150PDUNV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SX150DN is determined by the following critical parameters that must align with the original design requirements:

Pressure Measurement Capability: The substitute must support differential pressure measurement within the operating range of 100 PSI. The SX150DN operates at 100 PSI with a maximum pressure rating of 200 PSI. Substitute parts must accommodate this pressure range or exceed it without introducing incompatibility.

Output Configuration: The SX150DN uses a Wheatstone Bridge output with a 0 mV to 110 mV signal range at 5V supply. Substitute parts must maintain Wheatstone Bridge output topology to ensure signal conditioning compatibility with existing circuitry.

Supply Voltage Compatibility: The SX150DN requires 12V supply. Substitute parts must support 12V operation or provide a supply voltage range that includes 12V.

Port Interface: The SX150DN features dual barbed male ports at 0.19" (4.8mm) tube diameter. Substitute parts must maintain barbed port style and compatible tube diameter to ensure pneumatic connection integrity.

Package and Mounting: The SX150DN uses a 4-SIP module with through-hole mounting. Substitute parts must use the same or compatible package configuration to ensure PCB integration without redesign.

Environmental and Compliance Standards: The SX150DN is RoHS Compliant with MSL 1 rating. Substitute parts must maintain equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility: The NSCSHHN150PDUNV is a direct substitute for the obsolete SX150DN based on core functional parameters. Both sensors are manufactured by Honeywell Sensing and Productivity Solutions, use identical Wheatstone Bridge output topology, support 12V supply operation, and maintain equivalent environmental and compliance certifications (RoHS Compliant, MSL 1).

Pressure Range Consideration: The NSCSHHN150PDUNV operates at ±150 PSI with a maximum pressure rating of ±250 PSI, which exceeds the SX150DN's 100 PSI operating pressure and 200 PSI maximum pressure. This higher pressure capability provides additional design margin and system robustness without introducing incompatibility.

Output Signal Scaling: The NSCSHHN150PDUNV outputs 0 mV to 258.5 mV compared to the SX150DN's 0 mV to 110 mV. Signal conditioning circuitry must account for this increased output range. The substitute provides higher output sensitivity, which improves signal-to-noise ratio in measurement systems.

Supply Voltage Range: The NSCSHHN150PDUNV supports 1.5V to 12V supply, providing broader operational flexibility compared to the SX150DN's fixed 12V requirement. The substitute remains fully compatible with 12V supply systems.

Accuracy Improvement: The NSCSHHN150PDUNV offers ±0.25% accuracy versus the SX150DN's ±0.5%, representing a 2x improvement in measurement precision.

Port Interface Compatibility: The NSCSHHN150PDUNV uses 0.16" (3.94mm) barbed male ports compared to the SX150DN's 0.19" (4.8mm) ports. Pneumatic tubing connections require adapter fittings or tubing diameter adjustment to maintain system integrity.

Product Status: The NSCSHHN150PDUNV is classified as Active, ensuring long-term availability and supply chain continuity for new designs and legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Can the NSCSHHN150PDUNV directly replace the SX150DN without circuit modifications?

A: The NSCSHHN150PDUNV is functionally compatible as a substitute, but signal conditioning circuitry must be evaluated. The substitute outputs 258.5 mV maximum compared to the SX150DN's 110 mV maximum. Analog-to-digital converter (ADC) input ranges and signal amplification stages must accommodate the higher output voltage. Pneumatic port diameter differences (0.16" vs 0.19") require tubing adapter consideration.

Q: What is the impact of the different port sizes on system integration?

A: The NSCSHHN150PDUNV uses 0.16" (3.94mm) barbed ports while the SX150DN uses 0.19" (4.8mm) barbed ports. Existing pneumatic tubing sized for 0.19" ports will not fit 0.16" ports without adapter fittings. Tubing compatibility must be verified before installation. Barbed port style remains consistent between both sensors.

Q: Does the higher pressure rating of the NSCSHHN150PDUNV affect system performance?

A: The NSCSHHN150PDUNV's ±150 PSI operating pressure and ±250 PSI maximum pressure exceed the SX150DN's specifications. This provides additional design margin and system robustness. No performance degradation occurs when operating within the SX150DN's original 100 PSI pressure range. The substitute sensor maintains measurement accuracy and stability across its full operating range.

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

A: Both the SX150DN and NSCSHHN150PDUNV are RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity ratings. Both sensors carry ECCN EAR99 classification and HTSUS 9026.20.4000 tariff codes. Compliance certifications are equivalent, supporting use in regulated industries and applications requiring environmental standards adherence.

Q: What is the significance of the NSCSHHN150PDUNV's Active product status compared to the SX150DN's Obsolete status?

A: The SX150DN is obsolete, indicating discontinued manufacturing and limited future availability. The NSCSHHN150PDUNV is Active, confirming ongoing production and long-term supply chain availability. For new designs and legacy system maintenance requiring extended component availability, the NSCSHHN150PDUNV is the recommended selection.

Q: How does the improved accuracy of the NSCSHHN150PDUNV (±0.25% vs ±0.5%) impact measurement systems?

A: The NSCSHHN150PDUNV's ±0.25% accuracy represents a 2x improvement over the SX150DN's ±0.5% accuracy. This enhanced precision reduces measurement uncertainty and improves system calibration stability. Applications requiring tighter pressure measurement tolerances benefit from the substitute's superior accuracy specification.

Q: Is the NSCSHHN150PDUNV's broader supply voltage range (1.5V to 12V) compatible with existing 12V systems?

A: The NSCSHHN150PDUNV supports 1.5V to 12V supply operation, which includes the SX150DN's 12V requirement. Existing 12V power supplies and system designs remain fully compatible. The broader voltage range provides additional flexibility for future system modifications or multi-voltage applications.