Hall sensors - Show them your teeth

Baumer Electric: Hall sensors are particularly well suited for scanning gears and racks made of ferromagnetic materials. Their high resolution allows them to reliably detect gear teeth starting at module level 1.

Their maximum switching frequency is 20 kHz, making them up to five times faster than inductive sensors employed for similar applications. Thanks to two phase-shifted signals, Hall sensors are even capable of detecting rotational direction or direction of travel. Hall sensors thus offer themselves for use as replacements for incremental encoders. And since, in contrast to encoders, they contain no ball bearings or other moving parts, the sensors are subject to practically no wear, even at high rotational speeds. The units themselves are vibration and shock resistant. The front face of the M12 full metal jacket made of 1.4305 stainless steel corresponds to protection class IP 68. The operating temperature range lies between -40 °C and +120 °C.

Hall sensors are designed for employment in harsh industrial environments subject to extreme dust and oil contamination. Examples of such applications include textile, tobacco and cement processing as well as agricultural equipment. Keyways at either housing end allow them to be easily adjusted to the gearing being scanned.

Special features:

• Scanning ferromagnetic gears
• Resolution as low as gear module 1
• Max. switching frequency 20,000 Hz
• Full metal M12 stainless steel housing
• IP 68 protection class