CA79860-06-010 Magnetoelectric Speed Sensor 6V DC IP67 Stainless Probe

1. Compact Explosion-Proof Speed Monitoring Solution​

The AI-Tek CA79860-06-010 is an intrinsically safe speed sensor engineered for space-constrained rotational monitoring in hazardous industrial environments. Featuring a ​magnetic sensing principle​ with ​6mm detection range (06 suffix)​, this compact device generates digital pulses proportional to ferrous gear teeth or notch passage with ​​±0.1% accuracy. Its ​stainless steel housing (316L)​​ achieves ​ATEX/IECEx Zone 0/1 certification​ and ​IP68 protection​ against dust, moisture, and temporary submersion (1m depth). The "010" designation denotes ​NAMUR-compliant output​ (IEC 60947-5-6) for direct safety system integration. Operating across ​​-40°C to +100°C, it incorporates ​hermetic sealing​ to prevent gas ingress in explosive atmospheres. Designed for turbines, compressors, and conveyors in oil/gas, mining, and chemical processing, this sensor provides reliable speed feedback where combustible gases/dusts demand rigorous safety standards with SIL 2 compliance per IEC 61508.

​2. Critical Technical Specifications​

• ​Sensing Performance:
  Target: Ferrous gear teeth (≥6mm module)
  Sensing Distance: 6mm ±0.3mm
  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:
  IP68 (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: PUR 2m (oil-resistant)
  Mounting: M12×1 threaded
  Dimensions: Ø12×40mm

​3. Hazardous Environment Applications​

This sensor serves critical speed monitoring roles in explosive atmospheres:

• ​Offshore Gas Compressors: Shaft speed monitoring in Zone 1 methane environments
• ​Mining Conveyors: Speed verification in combustible dust (Zone 21)
• ​Refinery Turbines: Overspeed protection per API 670 standards
• ​Chemical Reactors: Agitator speed control in Zone 0 H₂S areas
• ​Pharmaceutical Mixers: Shaft RPM monitoring in ATEX Zone 22
• ​Marine Thruster Systems: Propeller shaft RPM monitoring
• ​Fuel Transfer Pumps: Safety cutoffs in flammable vapor zones
• ​Explosives Manufacturing: Mixer speed verification
  Its compact M12 form factor enables installation in confined spaces like gearbox housings or motor end bells, while IP68 rating ensures reliability in washdown areas and temporary submersion scenarios common in offshore platforms.

​4. Functional Advantages​

• ​Space Optimization:
  40mm length fits tight clearances
  Radial cable exit saves panel space
• ​Hazardous Area Safety:
  Intrinsic safety barriers limit energy to <0.03W
  Hermetic seals prevent explosive gas permeation
• ​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
• ​Compliance Efficiency:
  SIL 2 capable per IEC 61508
  Pre-certified IECEx/ATEX documentation

​5. Speed Sensing Operation​

​Magnetic Sensing Sequence:

1. ​Target Detection:
   • Gear tooth approaches within 6mm → 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 >6.5mA
4. ​Fault Diagnostics:

   ​LED State​	​Condition​
   Solid Green	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

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