Honeywell POS187414 Liquid Level Sensor - Equivalent & Substitute Parts

Part Overview

The Honeywell POS187414 is a liquid level sensor with PNP output configuration, designed for bracket mount installation in industrial applications. This sensor operates across a voltage range of 12–28V with a maximum current rating of 200 mA and is constructed with stainless steel housing and prism materials. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for system maintenance and component replacement in existing installations.

Substiute Parts

POS187414

Honeywell Sensing and Productivity SolutionsIn Stock: 759POS187414 Datasheet

Current PartRFQ

SQ4-A21-P

Panasonic Industrial Automation SalesIn Stock: 1036SQ4-A21-P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell POS187414 is determined by the following critical parameters:

Output Configuration: PNP output is the primary functional requirement. Any substitute must provide identical output logic to maintain circuit compatibility.

Mounting Type: Bracket mount configuration is mandatory for mechanical fit within existing installations.

Sensor Type: Liquid level detection capability must be preserved.

Voltage Compatibility: The substitute must operate within the control system's voltage supply range. The POS187414 operates at 12–28V; substitutes operating at narrower ranges (such as 12–24V) remain compatible with systems designed for the original part's maximum voltage specification.

Current Rating: The 200 mA maximum current must not be exceeded by the substitute to prevent circuit protection device activation.

Operating Temperature: The substitute's temperature range must encompass the application's operating conditions. The POS187414 operates from −25°C to +100°C.

Housing Material & Environmental Resistance: Stainless steel construction provides corrosion resistance in harsh environments. Substitutes with alternative materials must demonstrate equivalent environmental durability for the intended application.

RoHS & Regulatory Compliance: Both parts must meet applicable regulatory standards for the target market.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: The Panasonic SQ4-A21-P is the identified equivalent for the Honeywell POS187414. Both sensors share identical output configuration (PNP), sensor type (liquid level), and mounting method (bracket mount), establishing functional compatibility at the circuit interface level.

Compliance Status: The SQ4-A21-P is an active product with ROHS3 compliance, whereas the POS187414 is obsolete. Selection of the active substitute ensures continued availability and regulatory alignment with current manufacturing standards.

Operating Range Considerations: The SQ4-A21-P operates within a narrower voltage range (12–24V) and temperature range (−10°C to +55°C) compared to the POS187414 (12–28V, −25°C to +100°C). Substitution is valid only when the application's actual operating conditions fall within the SQ4-A21-P specifications.

Material Difference: The POS187414 uses stainless steel housing, while the SQ4-A21-P uses polypropylene. In applications requiring corrosion resistance or exposure to aggressive chemical environments, material compatibility must be evaluated against specific environmental conditions.

Current Rating Verification: The SQ4-A21-P current rating is not provided in available data. Circuit design current requirements must be confirmed against manufacturer specifications before final selection.

Frequently Asked Questions (FAQ)

Q: Can the Panasonic SQ4-A21-P directly replace the Honeywell POS187414 in all applications?

A: Direct replacement is valid when the application's voltage supply (12–24V range) and operating temperature (−10°C to +55°C range) fall within the SQ4-A21-P specifications. Applications requiring operation at voltages above 24V or temperatures below −10°C or above +55°C require alternative solutions.

Q: What is the significance of the PNP output configuration in substitution?

A: PNP output determines the signal logic and circuit interface. Both the POS187414 and SQ4-A21-P provide PNP output, ensuring compatible behavior with existing control circuits without rewiring or logic modification.

Q: Why does the housing material differ between these sensors?

A: The POS187414 uses stainless steel for enhanced corrosion resistance in harsh environments, while the SQ4-A21-P uses polypropylene for cost efficiency. Material selection depends on environmental exposure; stainless steel is preferred in corrosive or high-temperature applications.

Q: Is the SQ4-A21-P suitable for applications requiring the full −25°C to +100°C temperature range of the POS187414?

A: No. The SQ4-A21-P operates only from −10°C to +55°C. Applications requiring the extended temperature range of the original sensor require alternative components rated for those conditions.

Q: What packaging format is the SQ4-A21-P supplied in?

A: The SQ4-A21-P is supplied in box packaging, whereas the POS187414 packaging format is not specified in available data. Verify packaging requirements for your procurement and inventory management processes.

Q: Are both sensors RoHS compliant?

A: Yes. The POS187414 is RoHS Compliant, and the SQ4-A21-P is ROHS3 Compliant. Both meet regulatory requirements for restricted substance elimination in electronic components.

Q: What should be verified before finalizing substitution?

A: Confirm that the application's voltage supply, operating temperature range, environmental conditions (particularly chemical exposure), and current requirements all fall within the SQ4-A21-P specifications. Obtain detailed current rating specifications from the manufacturer if not provided in standard datasheets.