Introduction
The AI-TEK 70085-1010-018 is a passive magnetic speed sensor designed for reliable rotational speed measurement in demanding industrial environments. This sensor converts mechanical motion into an electrical signal, providing critical feedback for monitoring and control systems. This guide covers the sensor's core specifications, integration considerations, installation best practices, and performance optimization to help you select and deploy this component effectively.
Core Specifications
The AI-TEK 70085-1010-018 delivers a standard output voltage of 40 V (P-P) and a guaranteed output voltage of 3.4 V (P-P), ensuring a strong signal even at low speeds. Its DC resistance is 130 ohms maximum, with a typical inductance of 33 mH, which influences signal conditioning requirements. The sensor operates over a wide temperature range from -55 to +107°C, making it suitable for extreme environments. With a net weight of 5 oz. maximum, it is lightweight and easy to mount.
These parameters directly affect sensor selection. The high output voltage allows for long cable runs without signal degradation. The low DC resistance minimizes power loss in the circuit. The operating temperature range ensures reliable performance in both cold storage and high-heat machinery areas. When choosing this sensor, verify that your measurement system can accept the 40 V (P-P) signal and that the ambient temperature stays within the specified limits.
Compatibility and Integration
The AI-TEK 70085-1010-018 is a passive sensor that generates its own signal without requiring external power. It connects to most PLCs, tachometers, and frequency-to-analog converters that accept a sinusoidal or square wave input. The output polarity is Pin 'B' positive, so ensure your wiring matches this convention. The sensor uses a connector termination, simplifying installation and replacement.
Integration typically involves mounting the sensor near a ferromagnetic target (such as a gear tooth or keyway) and connecting the output to a signal conditioning module. No special communication protocols are needed, as the output is a simple AC voltage. For best results, use shielded twisted-pair cable to reduce electrical noise interference. The sensor's 5/8-18 thread size is a common standard, making it compatible with many existing mounting brackets and adapters.
Installation and Configuration
Install the AI-TEK 70085-1010-018 by threading it into a mounting hole with a 5/8-18 thread. The thread length is 3.625 inches, and the total sensor length is 4.75 inches. Ensure the sensor tip is positioned close to the target, typically within 0.020 to 0.050 inches, to guarantee the 3.4 V (P-P) output. The operating temperature range of -55 to +107°C allows installation in both hot and cold zones, but avoid direct exposure to corrosive chemicals or excessive vibration.
Wiring is straightforward: connect Pin 'B' to the positive input of your measurement device and the sensor body (or Pin 'A') to ground. No external power supply is required. For applications requiring the guaranteed output voltage, maintain the specified air gap and target speed. Use a connector that matches the sensor's termination type to ensure a secure and weatherproof connection.
Performance Optimization
To achieve the best performance from the 70085-1010-018, maintain a consistent air gap between the sensor tip and the target. The guaranteed output voltage of 3.4 V (P-P) is achieved at a specific gap and target speed; exceeding the recommended gap reduces signal amplitude. The standard output of 40 V (P-P) occurs at higher speeds or with larger targets, providing a strong signal for long-distance transmission.
The sensor's typical inductance of 33 mH and DC resistance of 130 ohms maximum create a natural low-pass filter. For high-speed applications, ensure your signal conditioning circuit can handle the sensor's frequency response. In noisy environments, use shielded cable and proper grounding to maintain signal integrity. The wide temperature range ensures stable performance across seasonal changes and process variations.
Frequently Asked Questions
How do I select the right 70085-1010-018 for my application?
Consider your required output voltage, operating temperature, and mounting constraints. The 70085-1010-018 provides 40 V (P-P) standard and 3.4 V (P-P) guaranteed, with a temperature range of -55 to +107°C. Ensure your measurement system can accept these signal levels and that the ambient environment stays within the temperature limits. The 5/8-18 thread and 3.625-inch thread length must match your mounting setup.
What are the mounting requirements for the 70085-1010-018?
The sensor requires a 5/8-18 threaded hole for mounting. The thread length is 3.625 inches, and the total sensor length is 4.75 inches. Position the sensor tip within 0.020 to 0.050 inches of the target to guarantee the 3.4 V (P-P) output. No special cooling is needed, but avoid locations with excessive vibration or corrosive substances. The lightweight design (5 oz. max) simplifies mounting.
Can the 70085-1010-018 be integrated with existing systems?
Yes, the sensor outputs a simple AC voltage signal (40 V P-P standard, 3.4 V P-P guaranteed) that connects to most PLCs, tachometers, and frequency converters. The output polarity is Pin 'B' positive, and termination is via a connector. No external power is required. Use shielded twisted-pair cable for noise immunity. The sensor is compatible with any system that accepts a sinusoidal or square wave input from a passive magnetic pickup.
What maintenance does the 70085-1010-018 require?
The sensor is passive and requires no routine maintenance beyond periodic inspection. Check the air gap periodically, as vibration or thermal expansion can change it. Ensure the connector remains clean and secure. The operating temperature range of -55 to +107°C allows use in harsh environments, but avoid exceeding these limits. No lubrication or calibration is needed. Replace the sensor if the output voltage drops below the guaranteed level.
Support and Resources
SpareTechPLC provides technical documentation, including wiring diagrams and application notes, for the AI-TEK 70085-1010-018. Our support team is available by phone and email to assist with selection, installation, and troubleshooting. Visit www.sparetechplc.com for more resources and to inquire about pricing and availability. We offer fast shipping and expert guidance to ensure your project succeeds.
