Datasheet

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
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