SX100DN Pressure Sensor Equivalent & Substitute Parts

Part Overview

The SX100DN is a differential pressure sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for board mount applications requiring 100PSI (689.48kPa) differential pressure measurement. The sensor outputs a Wheatstone Bridge signal of 0 mV ~ 150 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. 717 units are available in current inventory as new original stock.

Substiute Parts

SX100DN

Honeywell Sensing and Productivity SolutionsIn Stock: 791SX100DN Datasheet

Current PartRFQ

NSCSHHN100PDUNV

Honeywell Sensing and Productivity SolutionsIn Stock: 1158NSCSHHN100PDUNV Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SX100DN is determined by the following critical parameters that must remain compatible:

Pressure Measurement Capability: The substitute must support differential pressure measurement at or above 100PSI operating pressure. The SX100DN operates at 100PSI with a maximum pressure rating of 150PSI.

Output Signal Type: The substitute must provide Wheatstone Bridge output to maintain compatibility with existing signal conditioning and measurement circuits.

Electrical Interface: The substitute must operate within the 12V supply voltage specification and provide output in the millivolt range suitable for the existing measurement system.

Physical Package: The substitute must use 4-SIP module packaging with PC pin termination for through-hole mounting on printed circuit boards.

Port Configuration: The substitute must accommodate dual male tube ports for pneumatic connections.

Environmental Compliance: The substitute must maintain RoHS compliance and MSL rating 1 for manufacturing and storage compatibility.

The NSCSHHN100PDUNV meets these substitution criteria while offering enhanced specifications in accuracy, supply voltage flexibility, and maximum pressure rating.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SX100DN is obsolete and no longer manufactured. The NSCSHHN100PDUNV is an active product from the same manufacturer, ensuring continued availability and technical support for future procurement.

Compliance and Certification: Both components maintain RoHS compliance and identical MSL rating 1, confirming compatibility with current manufacturing and storage standards. Both carry ECCN EAR99 and HTSUS 9026.20.4000 classifications.

Functional Compatibility: The NSCSHHN100PDUNV provides Wheatstone Bridge output identical to the SX100DN, supporting direct integration with existing signal conditioning circuits. The substitute operates at the specified 12V supply voltage and produces output in the same millivolt range.

Performance Enhancement: The substitute offers improved accuracy (±0.25% versus ±0.5%) and higher maximum pressure rating (±250PSI versus 150PSI), providing additional design margin without compromising the original application requirements.

Physical Integration Considerations: The substitute uses identical 4-SIP through-hole packaging and PC pin termination. However, the port size differs (0.16" versus 0.19" tube diameter) and port style changes from barbless to barbed. These differences require evaluation of tubing connection methods and potential adapter requirements for pneumatic connections.

Supply Voltage Flexibility: The NSCSHHN100PDUNV supports a wider supply voltage range (1.5V ~ 12V) compared to the fixed 12V requirement of the SX100DN, offering flexibility for future system modifications.

Frequently Asked Questions (FAQ)

Q: Can the NSCSHHN100PDUNV directly replace the SX100DN without any modifications?

A: The NSCSHHN100PDUNV is functionally compatible for electrical and signal output purposes. However, the pneumatic port size differs (0.16" versus 0.19" tube diameter), and the port style changes from barbless to barbed. Tubing connections must be evaluated and adapted accordingly. Electrical connections and signal processing remain compatible.

Q: What is the significance of the port style difference between barbless and barbed?

A: Barbless ports use friction fit connections with tubing, while barbed ports use barbs to mechanically lock tubing in place. The barbed design of the substitute provides improved tubing retention. Existing tubing sized for 0.19" barbless ports may not fit the 0.16" barbed ports without adapter tubing or new tubing sized for the smaller diameter.

Q: Does the improved accuracy of the NSCSHHN100PDUNV affect circuit compatibility?

A: No. The improved accuracy (±0.25% versus ±0.5%) does not affect electrical compatibility. The substitute produces Wheatstone Bridge output in the same millivolt range and operates at the same 12V supply voltage. Existing signal conditioning circuits will function without modification.

Q: Why does the NSCSHHN100PDUNV support bidirectional pressure measurement (±100PSI) while the SX100DN supports only unidirectional (100PSI)?

A: The NSCSHHN100PDUNV is designed for bidirectional differential pressure measurement, allowing it to measure pressure in both directions from a reference point. The SX100DN measures pressure in one direction only. For applications requiring only unidirectional measurement, the substitute operates identically to the original part.

Q: Is the higher maximum pressure rating of the NSCSHHN100PDUNV (±250PSI versus 150PSI) a concern for the original application?

A: No. The higher maximum pressure rating provides additional safety margin and does not affect operation at the original 100PSI operating pressure. This enhancement is beneficial for system reliability and longevity.

Q: Are there any supply voltage considerations when substituting the NSCSHHN100PDUNV?

A: The NSCSHHN100PDUNV operates at the specified 12V supply voltage of the original SX100DN. The substitute additionally supports lower supply voltages (1.5V ~ 12V), but this flexibility is not required for direct replacement. Existing 12V supply circuits remain compatible.

Q: What is the inventory status of these components?

A: The SX100DN has 717 units available as new original stock. The NSCSHHN100PDUNV has 1077 units available as new original stock. Both are available for immediate procurement.

Q: Are both components RoHS compliant?

A: Yes. Both the SX100DN and NSCSHHN100PDUNV are RoHS compliant and carry identical MSL rating 1 (Unlimited), confirming compatibility with current manufacturing and storage requirements.