Optical Liquid Level Sensors D500A3SH 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 D500 M10 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 RLED RPULL-UP OUTPUT Any (see below) Supply Current 10 mA Operating Temperature Range Housing Material -20°C to +80°C Polysulphone UDEL 1700 Environmental 0V IP 67 Rated Pressure Range 20 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 D500A3SH 021909