Wireless, non-contact magnetic sensors from Steute Industrial Controls (Ridgefield, CT), in the presence of their actuating magnet, send a unique, coded telegram to one or more compatible, easily-programmed receivers. The receiver accepts up to 10 discrete telegrams per channel. The magnetic devices, powered by a field-replaceable lithium battery, operate at 915 MHz (USA/Canada/Australia) or 868 MHz (Europe). Other features include sensing range of up to 30 mm; bidirectional communications with receiver; IP67 ingress protection rating; operating temperature range of -20 to + 65 °C; and a stainless-steel or glass-fiber reinforced plastic housing.
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