Water gates & long travel / POSITION FEEDBACK
Draw-Wire Sensors for Water-Gate Position & Long Travel
Specify mechanical gate opening with an identified datum, cable routing and environmental conditions. Extended ranges require project-specific feasibility.
Prepare this application enquiry ↗
OPENING DATUM / PAYOUT WINDOW
Eight meters of gate movement can need more than eight meters of payout.
Define opening relative to an agreed mechanical closed-position datum. Then identify the minimum and maximum sensor cable payout over the complete route. Fixed routing can consume part of the available payout even though it does not change the movement span.
8 m change between endpoints
Check both endpoints.
An 8 m change does not prove that a sensor with an 8 m or 10 m range can accommodate a required 12 m maximum payout. Confirm the selected device’s usable window, initial cable length, end reserves and any separately approved extension arrangement.
A fixed extension can reposition the attachment geometry where approved; it does not increase the measuring mechanism’s calibrated travel. A guide pulley redirects the path and must be matched to cable bend radius, alignment and the installation environment.
Gate opening and water level are different measurements.
Mechanical position
Specify the gate leaf, hoist or linkage point actually connected to the cable. Hoist rotation, cable slack, elastic movement and linkage backlash can make an indirect drive measurement differ from the gate leaf position.
The illustrated sensor above a rising gate reads less cable extension as the gate opens. Agree the signal direction and zero/span mapping rather than assuming that extension always means opening.
Site exposure and reference access
Describe splash, immersion conditions, freezing, debris, free spans, wind, cable supports and access for inspection. Cable path changes and environmental effects belong in the installed measurement error budget.
Mechanical opening is not a water-level or flow measurement. Define those separate process variables with their own suitable measurement method.
WayCon: cylinder stroke measurement for large structures — The original manufacturer discusses purpose-designed stroke sensing in dams and sluice-gate machinery; its product ratings are not transferred to DWP. Third-party specifications apply to their own devices.
Choose the long-range project scope from the actual route.
Up to 10–15 m requests
Review the applicable DWP-POS or DWP-ENC envelope and the full payout requirement. The mounting and cable route still need confirmation; a shorter movement does not automatically qualify the installation.
Compare requested stroke and output →15–100 m project requests
Use DWP-LNG for feasibility review of drum capacity, tension, routing and installation calibration. A 100 m request is a project target, not evidence of a released, tested or stocked 100 m sensor.
Review long-range transducer scope →State the PLC input, required position recovery after power loss and independent travel limits. Process position feedback alone does not establish the gate’s emergency-stop or protection architecture.
Review long-travel geometry and error sources →Water gates & long travel / REQUEST INPUTS
Bring these three details to the selection review.
Active gate travel and fixed cable route
Opening range, closed-position datum, fixed cable length, pulleys and free spans.
Water, weather and installation access
Splash or immersion depth/duration, ice, debris, temperature, supports and inspection access.
PLC feedback and position recovery
Output/input card, power-loss behavior, independent limits, calibration/reference points and required documents.
The enquiry opens with this application profile and three matching questions. Your answers remain in the form and enquiry text; they are not added to the website’s page address.
Request an application review ↗Payout, 100 m feasibility and exposure
Does a long cable route mean the measuring stroke must equal that total length?
Review both the sensor’s payout window and its change in payout, including any approved fixed extension. A fixed route and the active movement span are different quantities.
Is a 100 m sensor available as a standard model?
This website accepts 100 m project requests for feasibility review. Availability, mechanism, verified performance and delivery must be confirmed in a configuration-specific offer.
Can an enclosure option establish immersion or ice resistance?
No. State the actual exposure, depth, duration, temperature and moving-cable conditions. Request model-specific evidence and a maintainable installation plan.
Engineering guidance reviewed November 3, 2026. Original diagrams and calculations describe principles; performance and suitability require the selected model and installation to be checked.