AI-Tek 70085-1010-205 Passive Speed Sensor | Replacement, Equivalent & Selection Guide
The AI-Tek 70085-1010-205 is a rugged passive (magnetic pickup) speed sensor designed for demanding industrial environments. It generates a sinusoidal AC voltage signal proportional to the rotational speed of a ferrous gear or toothed wheel — requiring no external power supply. This page provides full technical specifications, verified compatible replacements, a structured selection guide, and sourcing information to help engineers and procurement teams make confident decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 70085-1010-205 |
| Manufacturer | AI-Tek Instruments |
| Series | 70085 |
| Sensor Type | Passive Magnetic Pickup (Variable Reluctance) |
| Output Signal | Sinusoidal AC voltage |
| Power Supply | Self-generating (no external power required) |
| Operating Temperature | -55°C to +150°C (typical) |
| Cable Length | 2.05 m (suffix -205) |
| Weight | 650 g (packaged) |
| Housing Material | Stainless steel / corrosion-resistant alloy |
| IP Rating | IP67 (typical for series) |
| Compliance | CE, RoHS |
Compatible Replacement & Equivalent Models
The following models are verified functional equivalents or drop-in replacements for the AI-Tek 70085-1010-205. Always confirm thread pitch, cable length, and signal conditioning requirements before substitution.
| Brand | Model | Notes |
|---|---|---|
| AI-Tek | 70085-1010-100 | Same series, 1.0 m cable variant |
| AI-Tek | 70085-1010-300 | Same series, 3.0 m cable variant |
| Honeywell | 1GT101DC | Variable reluctance, compatible signal output |
| Electro-Sensors | MPU-1 | General-purpose passive MPU, verify thread |
| Gems Sensors | VRS Series | Variable reluctance speed sensor, verify dimensions |
| Turck | BI Series (passive) | Confirm passive variant and output type |
Note: Konmask.com recommends verifying all replacement specifications against your OEM documentation before installation.
Why Choose the Original AI-Tek 70085-1010-205
- Proven reliability — AI-Tek has manufactured precision speed sensors for 50+ years across aerospace, power generation, and heavy industry.
- No power supply needed — passive design eliminates wiring complexity and failure points.
- Wide temperature range — suitable for engine bays, turbines, and outdoor industrial installations.
- OEM-grade accuracy — sinusoidal output integrates directly with PLCs, DCS controllers, and frequency converters.
- Long cable option — the -205 suffix denotes a 2.05 m integral cable, reducing field splicing requirements.
Typical Applications
- Gas turbine and steam turbine speed monitoring
- Diesel engine RPM feedback for governors and PLCs
- Conveyor belt and rotating machinery speed control
- Wind turbine rotor speed measurement
- Pump and compressor overspeed protection systems
- Marine propulsion shaft speed sensing
System Compatibility
The AI-Tek 70085-1010-205 is compatible with the following control system platforms when paired with appropriate signal conditioning modules:
- Siemens SIMATIC S7-300 / S7-400 / S7-1500 — via FM350/FM351 counter modules or analog input cards
- Allen-Bradley / Rockwell — 1756-HSC high-speed counter module
- Emerson DeltaV / Ovation DCS — with MPU signal conditioner cards
- Honeywell Experion PKS — via speed input modules
- Woodward governors — direct MPU input terminals
- Frequency converters (VFDs) — most drives with pulse/analog speed feedback inputs
Selection Guide
| Selection Factor | Guidance |
|---|---|
| Cable length | -100 = 1.0 m | -205 = 2.05 m | -300 = 3.0 m |
| Thread size | Confirm M18x1.5 or 3/4-20 UNF against your mounting boss |
| Gear tooth count | Higher tooth count = better low-speed resolution |
| Minimum speed | Passive sensors require minimum RPM to generate usable voltage |
| Temperature class | Standard rated to 150C; specify high-temp variant for exhaust-adjacent use |
| Connector type | Integral cable (standard) vs. MS connector variant |
Quality Assurance & Sourcing
- All AI-Tek sensors supplied by Konmask.com are sourced from authorized distributors or verified surplus channels with full traceability.
- Each unit undergoes visual inspection and packaging integrity check prior to dispatch.
- Certificate of conformance (CoC) available upon request.
- Lead time: typically 3-10 business days for in-stock units; 4-8 weeks for factory-order items.
- Export compliance: HS Code 8543.70 (electronic sensors); export documentation provided for international orders.
How to Order
- Confirm part number: AI-Tek 70085-1010-205
- Specify quantity and required delivery date.
- Contact us for volume pricing or expedited sourcing: support@konmask.com | +0086 19859288691
- Add to cart directly or request a formal quotation via email.
- Payment: T/T, PayPal, credit card accepted. Pro-forma invoice available for B2B orders.
Replacement & Compatibility FAQ
Q: Can I use a passive sensor replacement without changing my signal conditioner?
A: In most cases yes, provided the replacement has the same output impedance and voltage range. Always verify with your signal conditioner input specification sheet.
Q: What is the difference between a passive (VR) sensor and an active (Hall-effect) sensor?
A: Passive sensors generate their own AC voltage from gear tooth movement and require no power supply. Active sensors require 5-24 VDC supply and output a clean digital square wave — they offer better low-speed performance but add wiring complexity.
Q: Is the AI-Tek 70085-1010-205 suitable for hazardous area (ATEX/IECEx) installations?
A: The standard model is not ATEX-certified. Contact Konmask.com for intrinsically safe or explosion-proof variants if required.
Q: Can Konmask.com supply a test report or datasheet?
A: Yes. Official AI-Tek datasheets and, where available, incoming inspection reports are provided upon request.
Q: What if my exact part number is discontinued?
A: Our engineering team can cross-reference your requirements and recommend a verified equivalent. Contact us with your application details.
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Contact: support@konmask.com | +0086 19859288691
