Novotechnik LWH-0300 Linear Transducer — 300 mm Stroke, Resistive Position Output

Novotechnik · LWH Series · Linear Position Transducer · New in Box · 1PC

The Novotechnik LWH-0300 (also catalogued as LWH 300, LWH0300 and LWH300) is a German-engineered resistive linear position transducer built on Novotechnik’s long-running LWH film-potentiometer platform. With a 300 mm electrical stroke, an industry-standard 1 kΩ nominal resistance element, and a robust anodized aluminium housing, the LWH-0300 is purpose-built for position feedback in harsh industrial environments. Each unit is offered in New in Box (NiB) condition and ships as a single piece (1PC), ready for drop-in installation on hydraulic systems, machine tools, and process machinery. The passive voltage-divider output drives the analog-input cards used across Allen-Bradley, Siemens, Mitsubishi, Omron, Fanuc, Schneider, Yaskawa, Panasonic and KEYENCE controllers without protocol translation.

Key Technical Specifications

Application Scenarios — Where the LWH-0300 Fits

The LWH-0300 is widely deployed in industrial-automation plants that need a long-stroke analog position signal rather than a digital fieldbus reading. Typical use cases include:

• Hydraulic-cylinder position feedback on injection-molding machines, hydraulic presses, and large-bore material-handling cylinders
• Slide and ram travel monitoring on stamping presses, forging presses, and tube-bending machines
• Spindle, knee, and saddle travel readouts on CNC machine tools such as lathes, milling machines, and boring mills
• Damper, gate, and valve-stroke feedback on process-control skids where 4–20 mA or 0–10 V re-transmit is not available
• Servo-hydraulic and electro-mechanical actuator position verification in test rigs and production-line dynamometers
• Web-tension and dancer-position feedback on paper, film, foil, and textile converting lines
• Mobile and stationary crane outrigger or boom-extension measurement when paired with the IP67 sealed connector option

Because the LWH-0300 produces a passive resistive divider, it is fully compatible with the analog-input cards used by every major controller family — from Allen-Bradley 1756-IF8H modules and Siemens SM 331 AI inputs to Mitsubishi Q68ADI, Omron CP1W-AD041, Fanuc A03B-0807 I/O, Schneider BMXAMI0810, Yaskawa SGDV-OSG01, Panasonic FP0-A21, and KEYENCE NU-EP1 — making it an ideal drop-in for retrofit and brownfield service work across the full nine-brand KOEED catalog.

Integration & Wiring Notes

The LWH-0300 exposes three internal terminals: the wiper (signal), the start of the resistance track (+V), and the end of the track (GND). The recommended wiring pattern is:

• Connect +V to a stable 5 V DC to 30 V DC excitation. A 10 V reference is the most common supply because it gives a 0–10 V raw output that maps 1:1 to roughly 1 V per 30 mm of stroke.
• Connect GND to the controller’s analog common.
• Route the wiper directly to a high-impedance analog input (≥ 10 MΩ). The wiper circuit draws only microamps, so a long cable run is acceptable — but use shielded twisted pair and ground the shield at the controller end to reject EMI from VFDs and contactors.
• For installations that need a 4–20 mA signal, add an external voltage-to-current converter such as the Phoenix Contact MINI MCR, the WAGO 857, or any equivalent 0–10 V → 4–20 mA transmitter. Use the KOEED PLC Analog Calculator to convert the raw mV reading into engineering units (mm, cm, in, or percent stroke).

For multi-axis systems, route each transducer on its own shielded cable and avoid running the LWH cable parallel to servo power lines (for example Yaskawa Sigma-V motor leads) for more than 1 m. The Deutsch DT or M12 connector variants of the LWH ship with IP67 sealing; the cable-gland version is IP54 and should be mounted with the gland facing downward to keep cutting fluid and condensation out of the housing. Engineers standardising on a single brand of controller can browse the Allen-Bradley analog-input family or the Siemens SIMATIC S7-1500 AI modules to find the matching add-on card for this transducer.

Installation & Commissioning Tips

The LWH-0300 mounts via two swivel-clamp brackets on the body and a rod-end tip on the moving wiper. The recommended mounting sequence is:

1. Anchor the body. Fix the body bracket to a rigid machine surface — typically the cylinder end cap, the press frame, or the machine-tool slide — using M6 or M8 socket-head fasteners. Verify the bracket is parallel to the axis of motion to within ±0.5° to avoid side-loading the wiper.
2. Connect the rod end. Link the threaded tip to the moving member (piston rod, press ram, machine slide). Use a self-aligning rod end or a small clevis pin to absorb angular misalignment.
3. Sweep-test the output. Apply the supply voltage, then manually sweep the wiper through full stroke while monitoring the output on the controller’s analog-input diagnostics page. The output should be a smooth, monotonic ramp with no dead-band at either end. A small flat zone (≤ 0.5 mm) at each end is normal and corresponds to the electrical de-bounce region of the potentiometric track.
4. Calibrate zero and full-scale. Calibrate the zero and full-scale points in the PLC or CNC program. The KOEED PLC Hex to Float Converter is a convenient utility for converting the raw A/D counts (for example 0–27648 on a Siemens S7-1500 AI module, or 0–32767 on an Allen-Bradley 1756-IF8H) back into millimetre or inch units. If the controller throws an analog-input fault, the PLC Error Code Database can help interpret the diagnostic word.
5. Final lock-up. Lock the connector and apply thread-locking compound to the rod-end jam nut to prevent loosening under vibration. Pull-test the cable strain relief by hand before powering the machine.

For environments with frequent wash-down or oil splash, specify the IP67 sealed connector option rather than the IP54 cable-gland version, and route the cable into a flex-rated cable carrier (Igus E-chain or equivalent). Plants that run mixed-brand fleets can review the broader position-sensor and linear-transducer inventory before committing to a single supplier.

Procurement, Warranty & Lead Time

KOEED keeps New-in-Box LWH-0300 stock on hand for fast worldwide shipment. A standard quotation includes:

• Condition: New in Box (NiB), factory-sealed packaging, 1PC
• Documents: Datasheet and traceability paperwork available on request
• Shipping: Worldwide shipping via DHL, FedEx, UPS, or a designated forwarder
• Quote turnaround: Within 24 hours on business days after receipt of your RFQ
• Warranty: Covered under KOEED’s standard industrial-automation spare-parts terms — see our Return Policy and Terms of Service for full details

For engineering teams standardising on the LWH family, KOEED also stocks the full LWH stroke range — LWH-0075 (75 mm), LWH-0100 (100 mm), LWH-0150 (150 mm), LWH-0200 (200 mm), LWH-0250 (250 mm), LWH-0300 (300 mm), LWH-0360 (360 mm), LWH-0400 (400 mm) and LWH-0500 (500 mm) — so a single BOM can cover multiple machine variants. Cross-references to the Novotechnik LWX, T, and TX2 lines are also available for plants that need to consolidate vendors.

To request a quote, send your BOM, instrument list, or part number to Moritta@KOEED.COM with the project name and quantity. Engineers who already know the exact configuration can also use the Create a Quote form. If you are unsure whether the LWH-0300 is the right form factor for your machine, the KOEED AI Diagnostic Tool can suggest drop-in alternatives from the same Novotechnik family or from the broader All collection of linear sensors. For non-standard requirements, the Contact Us page lists additional channels, and our engineering team can be reached directly at Moritta@KOEED.COM for sizing and migration questions.

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