GX-M8B Inductive Proximity Sensor - Equivalent & Substitute Parts

Part Overview

The GX-M8B is an inductive proximity sensor manufactured by Panasonic Industrial Automation Sales, designed for non-contact detection in industrial automation applications. This M8 cylindrical threaded sensor operates with NPN-NC output configuration and provides a sensing distance of 1.5mm with shielded construction. The product is currently obsolete, making identification of suitable substitute components essential for system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

GX-M8B

Panasonic Industrial Automation SalesIn Stock: 914GX-M8B Datasheet

Current PartRFQ

GX-308M-B-N

Panasonic Industrial Automation SalesIn Stock: 1108GX-308M-B-N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The GX-308M-B-N qualifies as a functional substitute for the GX-M8B based on the following critical parameters:

Matching Criteria:

• Sensor Type: Both are inductive proximity sensors
• Output Configuration: Both provide NPN-NC, 3-Wire output
• Shielding: Both feature shielded construction
• Package Form: Both use Cylinder, Threaded - M8 mechanical form factor
• Termination: Both employ Cable Leads
• Ingress Protection: Both meet IP67 rating

Allowable Variations:

• Sensing Distance: GX-308M-B-N operates at 0.047" (1.2mm) versus GX-M8B at 0.059" (1.5mm). This represents a reduced sensing range suitable for applications requiring shorter detection distances.
• Response Frequency: GX-308M-B-N provides 2kHz versus GX-M8B at 5kHz. The lower frequency is acceptable for standard industrial switching applications.
• Voltage Supply: GX-308M-B-N accepts 10V ~ 30V, providing broader input voltage tolerance than GX-M8B's 12V ~ 24V range.
• Operating Temperature: GX-308M-B-N extends to -40°C ~ 85°C, exceeding GX-M8B's -25°C ~ 70°C range.
• Body Material: GX-308M-B-N uses Stainless Steel versus GX-M8B's Nickel-Plated Brass, offering enhanced corrosion resistance.

Parameter Comparison

Engineering Selection Recommendations

The GX-308M-B-N is an active product with current manufacturing status and ROHS3 compliance, making it suitable for replacement applications where the GX-M8B is no longer available. The substitute maintains electrical and mechanical compatibility through identical output configuration, M8 threaded package, and cable lead termination.

Selection of GX-308M-B-N is appropriate when:

• The application operates within the reduced sensing distance of 1.2mm
• System response frequency requirements do not exceed 2kHz
• Operating environment benefits from stainless steel construction and extended temperature range
• Supply voltage availability spans the 10V ~ 30V range

The GX-308M-B-N's enhanced environmental ratings (IP67G, IP69K capability) and broader operating temperature specification provide additional design margin for demanding industrial environments.

Frequently Asked Questions (FAQ)

Q: Can GX-308M-B-N directly replace GX-M8B in existing installations?

A: Direct mechanical and electrical replacement is possible due to identical M8 threaded package, cable lead termination, and NPN-NC output configuration. However, the reduced sensing distance (1.2mm versus 1.5mm) requires verification that target detection distances remain within the substitute's operating range.

Q: What is the primary difference in sensing capability between these sensors?

A: The GX-M8B provides 1.5mm sensing distance while GX-308M-B-N operates at 1.2mm. Applications requiring detection of objects at distances exceeding 1.2mm must retain the original GX-M8B specification or identify alternative sensors with greater sensing range.

Q: Are there voltage supply compatibility concerns?

A: The GX-308M-B-N accepts 10V ~ 30V input, which encompasses the GX-M8B's 12V ~ 24V range. Systems supplying 12V to 24V will operate both sensors without modification. Systems operating below 12V or above 24V require the GX-308M-B-N's extended voltage tolerance.

Q: How do response frequency differences affect application performance?

A: The GX-308M-B-N's 2kHz response frequency is suitable for standard industrial switching applications. Applications requiring switching speeds exceeding 2kHz per second must retain the GX-M8B's 5kHz capability or identify alternative sensors with higher frequency response.

Q: What advantage does stainless steel construction provide?

A: GX-308M-B-N's stainless steel body offers superior corrosion resistance compared to GX-M8B's nickel-plated brass. This is beneficial in environments with moisture, chemical exposure, or salt spray conditions.

Q: Does the substitute meet current compliance standards?

A: Yes. GX-308M-B-N carries ROHS3 compliance, representing the current RoHS standard. Both sensors meet EAR99 export classification and identical HTSUS commodity codes.