The HU-3 is the optional heating unit for the SL-QDM Series, SL-QDP Series, SL-QN Series, AX-TN Series, and AX-TF Series Photoelectric Detectors.
It comes as a set (one for transmitter beam and one for receiver beam - 2 sets required for SL Series beams) and should be used in temperatures below freezing or where frost is an issue.
Key features
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Power input: 24 VAC/DC
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Current draw: 420 mA (max.) (Per 1 unit)
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Thermo switch: 60°C (140°F)
