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Aalborg®'s Optical Sensor Switch helps protect your processes and equipment from damage caused by extreme flow rates. It's compact design and ease of operation make it a non-obtrusive, simple to use addition to your flow meter and is perfect for OEM applications. The Optical Sensor Switch can be used whenever maximum or minimum flow levels need to be automatically monitored and in conjunction with a control relay to power alternate equipment or monitoring devices.

PRINCIPLE OF OPERATION: A small LED sensor and receiver are mounted on one side of the flow meter. The float inside the flow tube is detected as it passes across the beam of light. The sensor can be used to detect float passage beyond the setpoint of the sensor or can be set to monitor float position at specific level, signaling when the float is outside of the range of the sensor light beam.

MODE OF DETECTION: Red LED beam break.

POWER REQUIREMENTS: 10 to 30 VDC @ 50 mA maximum: NPN (1) and PNP (1) output transistors provided NPN sink up to 100 mA PNP source up to 100 mA.

RESPONSE TIME: 500 msec.

LIGHT IMMUNITY: pulse modulated to provide extremely high immunity to ambient light.

AMBIENT TEMPERATURE: -30°C to +70°C operating range.

SENSOR CONSTRUCTION: high impact polycarbonate housing; epoxy encapsulated for mechanical strength.

LIGHT SOURCE: light emitting diode (LED).

WAVE LENGTH: high intensity red = 650 nm connections.