D500A4 Datasheet, PDF (1/1 Pages) American Electronic Components, inc – Optical Liquid Level Sensors

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 cou-
pling 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
Repeatability
Hysteresis
Response Time: Rising Liquid
Response Time: Falling Liquid
Supply Voltage (Vs)
Supply Current
Operating Temperature Range
Housing Material
Environmental
Pressure Range
D600 1/2” SAE Thread
± 1 mm
1 mm depending on liquid
50 µS
< 1 second
Any (see below)
10 mA
-20°C to +80°C
Polysulphone UDEL 1700
IP 67 Rated
7 bar
Vs
R_LED
0V
LED
Vs’
R_PULL-UP
OUTPUT
0V
Phototransistor
Pre-selected R_LED and R_PULL-UP Value for different Supply Voltages
Vs
R_LED
R_PULL-UP
V_OUTPUT in Air
V_OUTPUT 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
=
(V_s −1.3)V
10mA
= ^{12 −1.3} = 1070Ω ≈ 1.1kΩ
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: [phone] Fax: [phone]
D500A4 021909