HONEYWELL LSX4A3K SR:0626 Product Description

Overview

HONEYWELL LSX4A3K SR:0626 is a MICRO SWITCH LSX series explosion-proof side rotary limit switch for hazardous locations. HONEYWELL LSX4A3K SR:0626 adopts integrated flame path housing design to prevent external explosive atmosphere ignition, and it is used for position detection and travel signal feedback in flammable gas and dust environments. HONEYWELL LSX4A3K SR:0626 delivers reliable snap-action switching output for safety interlock and equipment position monitoring.

Features

HONEYWELL LSX4A3K SR:0626 is side rotary actuated with SPDT 1NO+1NC snap action contact configuration. It carries hazardous area certifications for Class I Div 1 / Div 2 and Class II Div 1 / Div 2, suitable for gas and dust explosive zones. The metal housing is sealed to IP67 and NEMA 1,3,4,6,13 standards, resisting moisture, dust and splashing liquid. The switch head can be indexed in four 90° positions and supports clockwise and counterclockwise lever adjustment. HONEYWELL LSX4A3K SR:0626 uses pressure plate terminals for convenient wiring and stable contact. The internal flame quenching path cools hot gas before escaping the enclosure to avoid ignition of surrounding media. It can be equipped with optional lever arms and non‑sparking actuators. SR:0626 is the production serial mark for traceability. HONEYWELL LSX4A3K SR:0626 can replace BX series limit switches for retrofit and maintenance.

Specs

Brand: HONEYWELL Model: LSX4A3K Serial mark: SR:0626 Product series: MICRO SWITCH LSX Product category: Explosion-proof limit switch Actuation type: Side rotary Contact form: SPDT 1NO+1NC snap action Protection class: IP67, NEMA 1,3,4,6,13 Hazardous approval: Class I Div1/Div2, Class II Div1/Div2 Housing material: Aluminum alloy Conduit entry: 0.75 in 14NPT Operating temperature: -40℃ to 121℃

Principle

HONEYWELL LSX4A3K SR:0626 triggers internal snap-action mechanism when the external lever is pushed by mechanical movement. The contact state changes instantly to send on/off discrete signals to PLC or safety relay. If an internal electric arc occurs, the flame path structure cools the high-temperature gas and prevents flame propagation to the outside explosive atmosphere. HONEYWELL LSX4A3K SR:0626 converts mechanical position movement into safe electrical switching signal output for interlock control.

Applications

HONEYWELL LSX4A3K SR:0626 is widely used in hazardous process industries. It is commonly applied in chemical plants, oil and gas skids, pharmaceutical explosive zones, grain dust processing and paint workshops. It is used for valve position feedback, door safety interlock, conveyor limit stop and machinery travel protection. It can cooperate with safety modules and explosion-proof junction boxes to form reliable position detection circuits for explosive areas.