M112 Intrinsically safe gauge head position sensor

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Key features

• Designed for use in mining, gas and dust environments (Ex I/II M1/1GD)
• Spring-loaded stainless steel plunger with travel set to customer specification (5–50 mm)
• Compact 19 mm diameter body with IP67 sealing
• Non-contact inductive technology for high reliability and long life
• EMC compliant and suitable for cable lengths up to 1000 m
• Compatible with Althen X005 galvanic isolation amplifier

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Performance highlights

The M112 provides a reliable linear output proportional to displacement and is calibrated for the specific travel range required by the customer. The sensor delivers high accuracy (≤ ±0.25% FSO), outstanding stability, and repeatability across wide temperature ranges from -40°C to +80°C. It uses proven inductive technology and includes full EMC protection, offering excellent performance in electrically noisy environments.

Usage conditions

The M112 is intrinsically safe for mining and hazardous environments, certified to Ex I/II M1/1GD standards. The stainless steel construction and IP67 sealing ensure mechanical robustness and environmental resistance. The sensor supports both axial and radial mounting options and is easy to install using a long ½" UNF thread with included lock nuts.

Possible applications

• Gauge head positioning in mining and drilling operations
• OEM equipment in explosive environments
• Linear measurement in test benches and process machinery
• Research and development applications requiring certified safety

Advantages of choosing this product

Choosing the M112 sensor ensures reliable operation in hazardous zones, even with long cable runs. The sensor’s mechanical integrity, combined with its precise analog output and compatibility with Althen’s X005 amplifier, makes it a preferred choice for OEMs and system integrators. With customization options and multiple connector configurations, it offers flexibility for varied installations.

Other important features

• Spring force: 1.5 to 4.5 N approx.
• Frequency response: >10 kHz
• Infinite resolution and low noise (<0.02% FSO)
• Five-wire option eliminates voltage drop effects in long cables
• M12 connectors or cable gland options available
• Output: 0.5–4.5V ratiometric with supply (5V input)

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