Datasheet

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
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