Optical Liquid Level Sensors D500A4SH This liquid presence sensor has been developed to address the needs of high volume OEM applications. The sensor contains an infra-red emitter and detector accurately positioned to ensure good optical coupling between the two when the sensor is in air. When the sensor’s cone is immersed in liquid, the infra-red light escapes from the cone causing a change in the amount of light at the detector. This configuration allows the customer to tailor the sensor electronics (supply, protection etc.) to their unique application. Housing D600 1/2” SAE Thread Repeatability ± 1 mm Hysteresis 1 mm depending on liquid Response Time: Rising Liquid 50 µS Response Time: Falling Liquid < 1 second Supply Voltage (Vs) Vs Vs’ RPULL-UP RLED OUTPUT Any (see below) Supply Current 10 mA Operating Temperature Range Housing Material -20°C to +80°C 0V Phototransistor 0V LED Polysulphone UDEL 1700 Environmental IP 67 Rated Pressure Range 7 bar Pre-selected RLED and RPULL-UP Value for different Supply Voltages Vs RLED RPULL-UP VOUTPUT in Air VOUTPUT in Water 3.3V 200R 2K < 0.75V > 2.5V 5V 360R 2K < 1V > 4.25V 8V 680R 2.5K < 1.5V > 7.25V 12V 1K 3K < 3V > 11.25V 15V 1.3K 3.5K < 3.25V > 14.25V 24V 2.2K 4K < 10.5V > 22.5V Typical installation: Customer has to select suitable resistors for their chosen supply voltage. Forward voltage of LED is 1.3V and LED current should be 10mA (depending on application liquid). Therefore, for a supply of Vs: R LED = (Vs − 1 .3)V 12 − 1 .3 = = 1070 Ω ≈ 1 .1kΩ 10 mA 0.01 © American Electronic Components Inc 2008 Specifications are subject to change without notice. E&OE. American Electronic Components Inc., 1101 Lafayette Street, Elkhart, Indiana. USA Tel: +1-574-295-6330 Fax: +1-574-293-8013 D500A4 021909