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PRODUCT DESCRIPTION
785-LSQ051 Heavy duty limit switch
Honeywell 785-LSQ051 is an HDLS heavy-duty limit switch for mechanical position detection on industrial machinery. The LSQ051 configuration combines a rugged metal switch enclosure with a rotary operating head and snap-action contact mechanism, allowing machine travel to produce a repeatable electrical state change. Before replacement, verify the complete catalog number, actuator direction, mounting position, conduit entry, contact wiring and required travel. Final testing should confirm positive mechanical operation and reliable contact changeover throughout the machine cycle.
BEFORE YOU BUY
Confirm the complete Heavy duty limit switch
ACTUAL APPLICATIONS
Application context for 785-LSQ051
Manufacturer documentation places the Heavy Duty Limit Switch in practical safety applications. The three cases below describe different operating tasks in which 785-LSQ051 performs its documented product-family role with the configured companion equipment.
- 01 · CHEMICAL & PETROCHEMICAL
Manage high-pressure reactor protection during confirmed high-pressure
As part of the pressure channels and depressuring valves, 785-LSQ051 operates in its approved product-family role as a Heavy Duty Limit Switch. During confirmed high-pressure demand, the system uses this function to apply the approved voting logic to the protection channels, helping it reduce the protected vessel toward safe pressure. - 02 · OIL & GAS
Track compressor emergency shutdown during overspeed or process
At the control layer of the train trips, antisurge status and final elements, 785-LSQ051 provides its specified system function as a Heavy Duty Limit Switch. During overspeed or process excursion, the system uses this function to command the compressor train to its defined safe state, helping it protect personnel and rotating equipment. - 03 · POWER GENERATION
Manage turbine trip logic during abnormal speed
At the control layer of the speed and process trip inputs, 785-LSQ051 serves its documented function as a Heavy Duty Limit Switch. During abnormal speed, the system uses this function to vote the configured trip channels and issue the shutdown command, helping it bring the turbine toward a controlled safe state.
Technical specifications for 785-LSQ051
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Product Model785-LSQ051
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Product ParametersHeavy duty limit switch
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In stock1 unit
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ManufacturerHoneywell
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Catalog Number785-LSQ051
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SeriesHDLS LSQ
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Device TypeHeavy-duty limit switch
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Actuator StyleRotary operating head
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Contact FunctionSnap-action limit sensing
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Housing TypeIndustrial metal enclosure
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Conduit EntryThreaded wiring entry
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MountingFixed machine mounting
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Operating ModeMechanical position detection
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Field WiringInternal terminal connection
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Reset ActionSpring-return mechanism
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Environment UseIndustrial machinery service
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Secondary DesignationLSQ051
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CommissioningActuator travel verification
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Maintenance CheckHead alignment and sealing
View all additional
Alternative Names
785-LSQ051 LSQ051
785 LSQ051
Honeywell 785-LSQ051
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
SYSTEM INTEGRATION
Match 785-LSQ051 to the installed HDLS LSQ Series
Honeywell 785-LSQ051 is a Heavy duty limit switch used in the HDLS LSQ Series.
Confirm catalog number, device type, field terminals and the approved system configuration.
Use qualified personnel and follow the applicable Honeywell installation and commissioning instructions.
Features:
- Exact identity: 785-LSQ051
- Product class: Heavy duty limit switch
- Family: HDLS LSQ Series
The Honeywell 785-LSQ051 requires documented system integration before energising the equipment.
REPLACEMENT CONTROL
Verify the complete 785-LSQ051 identity before exchange
Replace 785-LSQ051 only after matching its full product identity, system role and electrical interface.
Photograph terminals, cable routing, slot position and companion hardware before removal from the HDLS LSQ Series installation.
Follow the applicable Honeywell service procedure and complete head alignment and sealing before release.
Features:
- Match exact 785-LSQ051 identity
- Confirm wiring and companion hardware
- Record the controlled functional test
The Honeywell 785-LSQ051 requires documented replacement verification before energising the equipment.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: Official documents are provided through manufacturer links. Accessories, manuals, cables, calibration data, software and certificates are included only when listed in the quotation.Features:
- Technical values prepared for 785-LSQ051
- Honeywell system references reviewed
- Exact hardware identity required before service
Documentation for Honeywell 785-LSQ051 must match the installed system and revision; confirm document applicability before service.
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Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed size12 × 6.8 × 4.5 cm
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Shipping weight0.9 kg
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02
Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference8536500090
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OriginUnited States
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
Full suffix recorded -
Condition checked
Label and appearance -
Packing checked
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Tracking supplied
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Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 785-LSQ051
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Why is the documented catalog number critical on 785-LSQ051?
For 785-LSQ051, confirm the engineering configuration; the accepted catalog number is 785-LSQ051 in the documented HDLS LSQ Series configuration. -
What wiring decision for 785-LSQ051 depends on HDLS LSQ?
For 785-LSQ051, inspect the exact terminal and cable route; the accepted series is HDLS LSQ in the documented HDLS LSQ Series configuration. -
How should technicians commission the device type on 785-LSQ051?
For 785-LSQ051, run the documented channel test; the accepted device type is Heavy-duty limit switch in the documented HDLS LSQ Series configuration. -
What fault can a mismatch in contact function cause on 785-LSQ051?
For 785-LSQ051, review diagnostics before energising; the accepted contact function is Snap-action limit sensing in the documented HDLS LSQ Series configuration. -
Which companion hardware must agree with Threaded wiring entry on 785-LSQ051?
For 785-LSQ051, match the mating assembly and revision; the accepted conduit entry is Threaded wiring entry in the documented HDLS LSQ Series configuration. -
What record proves the operating mode check for 785-LSQ051 was completed?
For 785-LSQ051, save the measured commissioning result; the accepted operating mode is Mechanical position detection in the documented HDLS LSQ Series configuration. -
How does environment use Industrial machinery service define the correct 785-LSQ051 installation?
For 785-LSQ051, compare the installed nameplate and order code; the accepted environment use is Industrial machinery service in the documented HDLS LSQ Series configuration. -
Which field check confirms Head alignment and sealing for 785-LSQ051?
For 785-LSQ051, measure the live field condition safely; the accepted maintenance check is Head alignment and sealing in the documented HDLS LSQ Series configuration.
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