The Balluff Model BTL7-E170-M1500-B-SA381-S32 Magnetostrictive Linear Position Transducer (Factory Order Code: BTL2TU1), engineered and manufactured by Balluff GmbH conforming to stringent ISO quality benchmarks across European Union and China facilities, is a premier industrial non-contact absolute stroke measurement sensor engineered for high-pressure hydraulic cylinders and severe operating environments.

Model Number Breakdown & Technical Architecture (BTL2TU1 / BTL7-E170-M1500-B-SA381-S32):
- BTL2TU1: Balluff standardized 7-character global material identification code ensuring complete factory traceability.
- BTL7: Generation 7 Micropulse platform featuring advanced digital signal filtering, enhanced electromagnetic compatibility (EMC), and high dynamic update frequencies up to 1000 Hz.
- E170: Analog current loop interface providing a 20 to 4 mA falling characteristic output (current descends from 20 mA at the zero point to 4 mA at the end of the 1500 mm stroke), offering superior noise rejection over long cable lengths and built-in fail-safe detection.
- M1500: Calibrated nominal stroke length of exactly 1500 mm (1.5 meters).
- B: Heavy-duty stainless steel Rod Series housing with an M18 x 1.5 metric threaded mounting flange, engineered for direct threaded installation into hydraulic cylinder end caps.
- SA381: Specialized application engineering build (specifically factory-configured for utility-scale wind turbine pitch control systems, including Gamesa wind turbine part number GP544390, and precision electro-hydraulic servo systems).
- S32: Industrial round 8-pin M16 x 0.75 male electrical connector with mechanical locking collar.

Key Engineering Features & Operational Advantages:
- Wear-Free Non-Contact Magnetostrictive Principle: Operates via the Wiedemann magnetostrictive effect between an internal waveguide interrogation pulse and an external non-contact magnetic ring target. With zero mechanical contact or friction, the transducer eliminates physical wear and component degradation, providing infinite operating life.
- True Absolute Position Tracking: Delivers immediate, precise absolute position coordinates upon power-up without requiring physical homing cycles or reference point seeking.
- Extreme Hydraulic Pressure Rating: The sensing rod is machined from high-integrity 1.4571 (AISI 316Ti) stainless steel with laser-welded sealing, engineered to withstand continuous working hydraulic pressures up to 600 bar (8,700 psi) and transient pressure spikes up to 1000 bar inside cylinder chambers.
- Sub-Millimeter Dynamic Precision: Features excellent repeatability (≤ ±5 µm) and low non-linearity (±0.04% Full Scale), providing smooth, lag-free position feedback for high-response closed-loop electro-hydraulic servo valves.
- Rugged IP67 Anodized Enclosure: The electronics housing is machined from anodized aluminum alloy sealed to IP67 ingress protection standards. The assembly withstands continuous operating shock loads of 100g and continuous vibration profiles up to 12g.

Target Industrial Sectors & Applications:
- Wind Energy Turbines: Hydraulic pitch cylinder position feedback inside the rotor hub of utility-scale wind turbines (direct replacement for Gamesa GP544390).
- Metal Rolling Mills & Heavy Metallurgy: Hydraulic roll gap regulation, slab caster mold oscillation, furnace ram positioning, and strip tensioning cylinders.
- Hydroelectric Power & Dam Infrastructure: High-reliability stroke feedback on dam spillway radial gates, intake penstock butterfly valves, and wicket gate actuators.
- Plastics, Rubber & Die-Casting: Clamping platen positioning and injection cylinder closed-loop control on heavy hydraulic molding machines.
- Heavy Mobile & Tunneling Equipment: Steering position on underground Tunnel Boring Machines (TBM) and outrigger/mast positioning on large mobile drilling rigs.

• Manufacturer: Balluff (Balluff GmbH)
• Country of Origin: 100% EU / China (manufactured to Balluff global industrial standards)
• Product Line: Micropulse BTL7 Series Magnetostrictive Linear Transducers (Rod Series)
• Model Designation: BTL7-E170-M1500-B-SA381-S32
• Factory Order Code: BTL2TU1
• Direct Cross-Reference / Replacement: Gamesa Wind Turbine PN GP544390
• Sensing Principle: Non-contact magnetostrictive technology
• Mechanical Configuration: Rod style for hydraulic cylinder integration
• Calibrated Nominal Stroke Length: 1500 mm (1.5 meters)
• Analog Output Signal: 20 to 4 mA (Falling / inverted characteristic curve)
• Maximum Output Load Resistance: ≤ 500 Ohm
• Operating Supply Voltage: 20 to 28 VDC (24 VDC nominal)
• Current Consumption (No-load): ≤ 150 mA
• Repeat Accuracy: ≤ ±5 µm (microns)
• Non-Linearity: ±0.04% Full Scale (or ≤ ±100 µm)
• Maximum Sampling Frequency: Up to 1000 Hz
• Hydraulic Operating Pressure Ratings:
  - Continuous Operating Pressure: Up to 600 bar (8,700 psi)
  - Proof / Peak Burst Pressure: Up to 1000 bar (14,500 psi)
• Mechanical Process Mounting: Threaded flange M18 x 1.5 metric thread
• Sensing Tube Diameter: 10.2 mm
• Null Zone (Dead zone at rod tip): Standard 51 mm
• Pressure Tube Metallurgy: High-grade stainless steel 1.4571 (AISI 316Ti)
• Electronics Housing Metallurgy: Anodized aluminum alloy
• Electrical Termination: 8-pin M16 x 0.75 male round connector (Connector S32)
• S32 Connector Pinout (8-Pin M16):
  - Pin 1: Current Output 20...4 mA
  - Pin 2: 0 V Output Signal Ground (GND)
  - Pin 3: Not connected
  - Pin 4: Not connected
  - Pin 5: Not connected
  - Pin 6: 0 V Power Supply Ground (GND)
  - Pin 7: +24 VDC Power Supply (+Ub)
  - Pin 8: Not connected
• Ingress Protection Rating: IP67 conforming to EN 60529 (when mated)
• Mechanical Shock Resistance: 100g / 6 ms conforming to EN 6068-2-27
• Mechanical Vibration Resistance: 12g (10 to 2000 Hz) conforming to EN 60068-2-6
• Operating Ambient Temperature Range: -30°C to +75°C (-22°F to +167°F)
• Storage Temperature Range: -40°C to +100°C
• Quality & Environmental Approvals: CE marked, cULus Listed, UKCA, WEEE, ISO 9001 certified.