SmartGas YK170 Series Miniature Linear Displacement Sensor

Overview

The SmartGas YK170 Series is a high-reliability, miniature linear displacement sensor engineered for precision position feedback in space-constrained and mission-critical environments. Based on a robust single-turn conductive plastic potentiometer architecture, the YK170 converts mechanical linear motion into a proportional analog voltage output via a precision-engineered cable-actuated mechanism. Its core sensing principle relies on direct mechanical coupling between the moving stainless-steel cable and a proprietary AccuTrak™ hub—eliminating backlash and ensuring repeatable, low-hysteresis performance over its rated lifetime of 10⁸ operational cycles. Designed for integration into environmental monitoring systems—including gas detection enclosures, HVAC damper actuators, and industrial safety interlocks—the YK170 operates reliably across extreme thermal gradients (−65 °C to +125 °C) and meets stringent aerospace environmental standards (DO-160D Category E1E1ABXHXFDXSAXXXXXXXXXX). Unlike optical or LVDT-based alternatives, this sensor delivers deterministic analog output without signal conditioning, enabling direct interface with PLCs, data loggers, and embedded microcontrollers compliant with IEC 61000-4 immunity requirements.

Key Features

• Compact cylindrical form factor: 24.4 mm diameter × 11.4 mm length; mass only 28 g—optimized for PCB-mount adjacent assemblies and confined instrument housings.
• Five standardized stroke variants (up to 165.1 mm), including a 51-mm (2-inch) maximum travel option for extended-range applications.
• AccuTrak™ hub technology ensures mechanical repeatability ≤±0.1% of full scale, validated per ISO 9001 calibration protocols.
• Hermetically sealed anodized 2024 aluminum housing provides corrosion resistance and structural rigidity under vibration per MIL-R-39023.
• Stainless steel cable (7×7 construction, Ø0.46 mm) with certified minimum breaking load ≥177 N and optional pull-force calibration (0.4 N or 3.3 N max).
• IP54/NEMA 3S ingress protection safeguards internal electronics against dust and water splashes—suitable for indoor/outdoor environmental monitoring cabinets.
• Standard 3-wire analog interface (V+, S+, V−/S−) with color-coded leads (white/black/red) for unambiguous field wiring and EMC-compliant grounding.

Sample Compatibility & Compliance

The YK170 series is compatible with all standard gas detector chassis requiring analog position feedback for valve actuation, filter positioning, or alarm-triggered mechanical shut-off mechanisms. Its operating temperature range aligns with UL 61010-1 and EN 61326-1 requirements for measurement control equipment used in hazardous locations. While not intrinsically safe by itself, the sensor may be integrated into ATEX/IECEx-certified gas detection systems when installed within appropriate barriers and enclosure-rated junction boxes. Electrical isolation (1000 VDC dielectric withstand) and insulation resistance (>1000 MΩ) support compliance with IEC 61000-4-5 surge immunity and IEC 61000-4-6 conducted RF immunity testing. Documentation includes traceable calibration certificates conforming to ISO/IEC 17025 guidelines upon request.

Software & Data Management

As a passive analog transducer, the YK170 requires no firmware, driver software, or configuration utilities. Its voltage-divider output (0–V_in) interfaces directly with any analog input channel meeting 12-bit or higher resolution specifications. For traceable data acquisition in GLP/GMP-regulated environmental monitoring workflows, the sensor integrates seamlessly with validated SCADA platforms (e.g., Siemens Desigo CC, Honeywell Experion PKS) and FDA 21 CFR Part 11-compliant data loggers (e.g., Omega OM-DAQPRO-5300). Optional audit-trail-enabled DAQ systems can record timestamped displacement values alongside concurrent gas concentration readings, supporting root-cause analysis during incident investigations per ISO 14001 Clause 10.2.

Applications

• Position feedback for solenoid- or motor-driven gas sampling valves in continuous emission monitoring systems (CEMS).
• Real-time damper tracking in HVAC air quality control units serving laboratories and cleanrooms.
• Mechanical end-stop verification in portable multi-gas detectors with retractable probe housings.
• Calibration reference displacement in automated gas cylinder leak-test rigs per ASTM E2855.
• Linear actuator monitoring in explosion-proof ventilated enclosures for oil & gas process analyzers.

FAQ

Is the YK170 suitable for outdoor deployment in humid environments?
Yes—its IP54-rated housing and anodized aluminum construction resist moisture ingress and corrosion; however, prolonged exposure to condensation or salt spray requires supplemental sealing at cable entry points.

Can the output signal be converted to digital (e.g., RS-485 or CAN bus)?
Not natively—the YK170 is an analog-only device. Integration with industry-standard signal conditioners (e.g., Phoenix Contact MINI MCR-SL-U-I-SP) enables isolated 4–20 mA or Modbus RTU output.

What is the recommended mounting orientation?
The sensor supports horizontal, vertical, or inverted installation. Cable exit direction is configurable for left-hand or right-hand mounting; refer to part-number suffix codes (e.g., “B” = base mount, “N” = no base).

Does SmartGas provide calibration certificates with traceability to national standards?
Yes—certificates compliant with ISO/IEC 17025 are available upon request, including as-found/as-left data and uncertainty budgets per GUM (JCGM 100:2008).

Is custom stroke length available beyond the five standard models?
Custom stroke variants (±0.1 mm tolerance) are available under OEM agreements, subject to minimum order quantities and extended lead times.