Equivalent & Substitute Parts: 20 INCH-G-4V-REF Pressure Sensor

Part Overview

The 20 INCH-G-4V-REF is a vented gauge pressure sensor manufactured by Amphenol All Sensors Corporation, designed for board mount applications requiring analog voltage output. This sensor operates at 0.72 PSI (4.98 kPa) with output range 0.25 V to 4.25 V and features amplified output with temperature compensation. The product is currently obsolete, necessitating identification of equivalent active alternatives to maintain system functionality and ensure continued component availability for new designs and field replacements.

Key Parameters

Parameter	Value
Operating Pressure	0.72 PSI (4.98 kPa)
Pressure Type	Vented Gauge
Output Type	Analog Voltage
Output Range	0.25 V ~ 4.25 V
Accuracy	±0.25%
Port Size	Male - 0.19" (4.83 mm) Tube
Port Style	Barbless
Package Type	4-SIP Module
Termination Style	PC Pin
Mounting Type	Through Hole
Operating Temperature	-25°C ~ 85°C
Features	Amplified Output, Temperature Compensated

Substitute Part Grouping Explanation

Substitution of the 20 INCH-G-4V-REF is determined by strict equivalence across the following critical parameters:

Pressure Specifications: Operating pressure of 0.72 PSI (4.98 kPa) and vented gauge pressure type must remain constant.

Electrical Characteristics: Output type (analog voltage), output range (0.25 V ~ 4.25 V), and accuracy (±0.25%) define functional compatibility.

Mechanical Interface: Port size (Male - 0.19" tube), port style (barbless), package type (4-SIP Module), termination style (PC Pin), and mounting type (through hole) ensure physical and electrical integration.

Environmental Performance: Operating temperature range (-25°C ~ 85°C) and temperature compensation feature must be maintained.

The 20 INCH-G-4V manufactured by Amphenol All Sensors Corporation satisfies all substitution criteria and is classified as the manufacturer-recommended equivalent.

Parameter Comparison

Parameter	20 INCH-G-4V-REF (Obsolete)	20 INCH-G-4V (Active)
Manufacturer	Amphenol All Sensors Corporation	Amphenol All Sensors Corporation
Operating Pressure	0.72 PSI (4.98 kPa)	0.72 PSI (4.98 kPa)
Pressure Type	Vented Gauge	Vented Gauge
Output Type	Analog Voltage	Analog Voltage
Output Range	0.25 V ~ 4.25 V	0.25 V ~ 4.25 V
Accuracy	±0.25%	±0.25%
Port Size	Male - 0.19" (4.83 mm) Tube	Male - 0.19" (4.8 mm) Tube
Port Style	Barbless	Barbless
Package Type	4-SIP Module	4-SIP Module
Termination Style	PC Pin	PC Pin
Mounting Type	Through Hole	Through Hole
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C
Features	Amplified Output, Temperature Compensated	Amplified Output, Temperature Compensated
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS Compliant
Supply Voltage	5.5 V ~ 16 V	4.5 V ~ 5.5 V
Maximum Pressure	10.84 PSI (74.75 kPa)	18.07 PSI (124.59 kPa)

Engineering Selection Recommendations

The 20 INCH-G-4V is the direct active equivalent for the obsolete 20 INCH-G-4V-REF. Both sensors maintain identical pressure specifications, electrical output characteristics, and mechanical interfaces required for functional substitution.

The 20 INCH-G-4V offers improved compliance status: RoHS Compliant versus the non-compliant 20 INCH-G-4V-REF. This compliance improvement supports regulatory requirements for new designs and procurement in regulated industries.

The 20 INCH-G-4V operates within a narrower supply voltage range (4.5 V ~ 5.5 V) compared to the 20 INCH-G-4V-REF (5.5 V ~ 16 V). System designs must verify that power supply specifications align with the active substitute's requirements.

The 20 INCH-G-4V provides higher maximum pressure rating (18.07 PSI versus 10.84 PSI), offering enhanced overpressure protection without affecting nominal operating characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 20 INCH-G-4V directly replace the 20 INCH-G-4V-REF in existing applications?

A: Yes. Both sensors share identical operating pressure (0.72 PSI), output range (0.25 V ~ 4.25 V), accuracy (±0.25%), port configuration (Male - 0.19" barbless tube), package type (4-SIP Module), and termination style (PC Pin). Physical and electrical integration is equivalent.

Q: What is the primary difference between these two part numbers?

A: The 20 INCH-G-4V-REF is obsolete; the 20 INCH-G-4V is active. The active substitute is RoHS Compliant, operates at a narrower supply voltage range (4.5 V ~ 5.5 V versus 5.5 V ~ 16 V), and provides higher maximum pressure rating (18.07 PSI versus 10.84 PSI).

Q: Are there any compatibility concerns with the supply voltage difference?

A: The 20 INCH-G-4V requires supply voltage between 4.5 V and 5.5 V. If the original design supplied 5.5 V ~ 16 V, the power supply must be verified or modified to operate within the active substitute's narrower range. The overlap at 5.5 V provides a common operating point for designs already operating at this voltage.

Q: Does the port size difference (4.83 mm versus 4.8 mm) affect compatibility?

A: Both sensors use Male - 0.19" barbless tube ports. The dimensional difference (0.03 mm) is within manufacturing tolerance and does not affect mechanical or functional compatibility.

Q: Is the higher maximum pressure rating of the 20 INCH-G-4V a concern?

A: No. The higher maximum pressure rating (18.07 PSI versus 10.84 PSI) provides additional overpressure protection. Nominal operating pressure remains 0.72 PSI for both sensors.

Q: What is the impact of RoHS compliance on component selection?

A: RoHS Compliance of the 20 INCH-G-4V supports regulatory requirements in markets requiring lead-free and restricted substance compliance. The obsolete 20 INCH-G-4V-REF is non-compliant. For new designs and regulated applications, the active substitute is the appropriate choice.

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