T77410-10 - Magnetoelectric Speed Sensor - 10V DC IP67 Stainless Industrial Probe

1. Intrinsically Safe Speed Monitoring Solution​

The AI-Tek T77410-10 is an explosion-proof speed sensor engineered for critical rotational monitoring in hazardous industrial environments. Featuring a ​magnetic sensing principle​ with ​10mm detection range, this device generates digital pulses proportional to gear teeth or notch passage with ​​±0.1% accuracy. Its ​stainless steel housing (316L)​​ achieves ​ATEX/IECEx Zone 0/1 certification​ and ​IP67 protection​ against dust, moisture, and temporary submersion. Operating across ​​-40°C to +100°C, the sensor outputs ​NAMUR-compliant signals​ (IEC 60947-5-6) for direct integration with safety systems. The mineral-insulated cable withstands ​150°C surface temperatures, while the hermetically sealed design prevents gas ingress in explosive atmospheres. Designed for oil/gas, mining, and chemical processing applications, it provides reliable speed feedback for turbines, compressors, and conveyors where combustible gases/dusts demand rigorous safety standards.

​2. Critical Technical Specifications​

• ​Sensing Performance:
  Target: Ferrous gear teeth (≥10mm module)
  Sensing Distance: 10mm ±0.5mm
  Frequency Range: 0–10kHz
  Accuracy: ±0.1% of reading
• ​Electrical:
  Voltage: 8-30V DC (loop-powered)
  Output: NAMUR (2-4mA current loop)
  Compliance: IEC 60947-5-6
• ​Environmental:
  IP67 (IEC 60529)
  Temperature: -40°C to +100°C
  Shock Resistance: 100g (IEC 60068-2-27)
• ​Hazardous Area:
  ATEX Ex ia IIC T4 Ga
  IECEx Ex ia IIC T4 Ga
• ​Mechanical:
  Housing: SS316L (EN 1.4404)
  Cable: 2m PUR/mineral-insulated
  Mounting: M18×1.5 threaded

​3. Hazardous Environment Applications​

This sensor serves critical speed monitoring roles:

• ​Offshore Gas Compressors: Shaft speed monitoring in Zone 1 methane atmospheres
• ​Mining Conveyors: Speed verification in combustible dust (Zone 21)
• ​Refinery Turbines: Overspeed protection per API 670 Annex H
• ​Chemical Reactors: Agitator speed control in Zone 0 H₂S environments
• ​Grain Elevators: Conveyor speed interlocks in ATEX Zone 22
• ​Marine Engine Rooms: Propulsion shaft RPM monitoring
• ​Petroleum Storage: Pump speed safety cutoffs
• ​Explosive Manufacturing: Mixer speed verification
  Its Ex ia certification ensures safe operation in continuously explosive atmospheres where standard sensors pose ignition risks, while IP67 rating maintains functionality in washdown areas.

​4. Functional Advantages​

• ​Hazardous Area Safety:
  Intrinsic safety barriers limit energy to <0.03W
  Hermetic seals prevent explosive gas ingress
• ​Signal Reliability:
  NAMUR output enables broken wire detection
  ±1μs pulse timing accuracy
• ​Environmental Durability:
  Resists oils, solvents, and UV degradation
  500hr salt spray resistance (ISO 9227)
• ​Diagnostic Intelligence:
  Dual-color LED indicates power/signal status
  Short-circuit/overload protection
• ​Installation Flexibility:
  360° adjustable sensing head
  ±3mm lateral tolerance alignment
• ​Compliance Efficiency:
  SIL 2 capable per IEC 61508
  Pre-certified for IECEx/ATEX documentation

​5. Speed Sensing Operation​

​Magnetic Sensing Sequence:

1. ​Target Detection:
   • Gear tooth approaches within 10mm → magnetic flux change
2. ​Signal Generation:
   • Hall-effect sensor triggers Schmitt-trigger circuit
   • Pulse width: 50% duty cycle ±5%
3. ​NAMUR Output:
   • Current swing: 2mA (no target) → 4mA (target detected)
   • Open-circuit detection: <1.2mA or >6mA
4. ​Fault Diagnostics:
   • ​Solid Green LED: Power applied
   • ​Flashing Green: Signal detected
   • ​Solid Red: Fault condition
   • ​Flashing Red: Configuration error

​Safety Architecture:

• Galvanic isolation >1.5kV AC
• Output current limited to <8mA
• Automatic shutdown on short circuit

Packaging & Shipping

Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.

With many years of experience in the industrial sector, we consistently deliver the highest quality of spare parts.which make sure that all this jobs are

perfectly.

we are major in PLC,Sensors,HIM,Transmitters.

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