Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
© TT electronics plc Issue I 04/2016 Page 1
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Sensing and Control
Description:
The OPB350 series liquid sensor is designed to work with 1/16” [1.6mm] 1/8” [3.2mm], 3/16” [4.8 mm] and 1/4” [6.3 mm]
outside diameter clear tubes. When output reference circuitry is added, multiple output states such as “fluid present,” “no
fluid present” and “no tube present” can be recognized.
Clear liquid present causes the phototransistor to sink the maximum current, while dark liquid present causes it to sink the
minimum current. As bubbles pass through the tube, the signal will vary between the “liquid present” and “no liquid” states. If
no tube is present, the phototransistor sinks current between the dark fluid and clear fluid states. The customer will have to
identify the typical current values for each situation. The ratio between the different states allows acknowledgement of
different conditions.
The OPB350L series have leads that are designed to mount directly to PCBoards. The OPB350W series with 26 AWG wires
are remote mountable. The OCB350 series provides a full solution with automatic calibration capability and a preset trip
level.
The OCB350 series is configured to optimize the design effort needed to use a fluid sensor with the addition of self
calibration circuitry. The OCB350 series are easy to use requiring only an optical device and power supply. Four lights are
provided on the board that acknowledge when the device is calibrated (Green LED), that the device could not be calibrated
(Red LED) and when the analog output has reached the logical trip higher than the calibration point (Blue LED) or lower than
the calibration point (Green LED). The internal phototransistor load resistance can be set for three different values (~2.5K,
~9.6K or ~27K Ohms). A Reset/Clear pin is provided for remote signaling to calibrate of the system.
The OCB350 series comes with an OPB350L_ _ _Z, PCBoard, interface cable (OCB100-MC24) and all the necessary
electronics required for sensing either transmissive or opaque fluids.
See “Theory of Operation” for detailed information.
For a custom PCBoard design for your unique challenge, contact your OPTEK representative.
Applications:
• Non-contact fluid sensing
• IV fluid
• Oils and other petroleum products
• Colored fluids
Features:
• Can identify if liquid is present in clear tubes that have an outside
diameter of 1/16” [1.6mm], 1/8" [3.2mm], 3/16" [4.8 mm] or
1/4" [6.3 mm]
• Opaque plastic housing enhances ambient light rejection
• Printed circuit board mounting or 24” (610 mm) 26 AWG wires
“T”
Package
“N”
Package “C”
Package
RoHS
© TT electronics plc Issue I 04/2016 Page 2
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
COMPLETE PART NUMBERS OF OPB350 AND OCB350 SERIES
OPB350 PCB mount for 1/8” tubing
OPB350L062 PCB mount for 1/16” tubing
OPB350W062Z Wired assembly for 1/16” tubing, with mounting tabs
OPB350L125 PCB mount for 1/8” tubing
OPB350C125Z Wired assembly for 1/8” tubing, mounting tabs & Molex connector 50-57-9404
OPB350W125Z Wired assembly for 1/8” tubing, with mounting tabs
OPB350L187 PCB mount for 3/16” tubing
OPB350W187Z Wired assembly for 3/16” tubing, with mounting tabs
OPB350L250 PCB mount for 1/4” tubing
OPB350W250Z Wired assembly for 1/4” tubing, with mounting tabs
OCB350L062Z OPB350L062 mounted on OCB100AZ calibration circuit board, with OCB-100-MC24 cable*
OCB350L125Z OPB350L125 mounted on OCB100AZ calibration circuit board, with OCB-100-MC24 cable*
OCB350L187Z OPB350L187 mounted on OCB100AZ calibration circuit board, with OCB-100-MC24 cable*
OCB350L250Z OPB350L250 mounted on OCB100AZ calibration circuit board, with OCB-100-MC24 cable*
(*cable not sold separately)
Notes:
(1) All parameters tested using pulse technique.
(2) RMA flux is recommended. Duration can be extended to 10 seconds maximum when flow soldering.
(3) Methanol or isopropanol are recommended as cleaning agents. The plastic housing is soluble in chlorinated hydrocarbons and keytones.
(4) Derate linearly 1.33 mW/° C above 25° C.
(5) Ee(APT) is a measurement of the average apertured radiant energy incident upon a sensing area 0.250” (6.350 mm) in diameter, which is perpendicular
to and centered to the mechanical axis of the emitting surface at a distance of 0.466” (11.837 mm).
E
e(APT) is not necessarily uniform within the measured area.
(6) The on/off ratio is referenced to the I.D. as specified for a clear PVC tube with O.D. per the device dimensions. The ratio is calculated by the IC(ON) when
the tube is filled with water divided by the IC(ON) with an empty tube.
© TT electronics plc Issue I 04/2016 Page 3
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
Absolute Maximum Ratings (TA = 25° C unless otherwise noted)
Storage Temperature -40° C to +100° C
Operating Temperature -40° C to +85° C
Lead Soldering Temperature [1/16 inch (1.6 mm) from the case for 5 sec. with soldering iron] (2) 260° C
LED
Forward DC Current 50 mA
Peak Forward Current (2 μs pulse width, 0.1% duty cycle) 1 A
Reverse DC Voltage 2 V
Power Dissipation 100 mW
Collector-Emitter Voltage 24 or 30 V
Collector DC Current 50 mA
Power Dissipation 100 mW
Output Phototransistor
Electrical Specifications
Electrical Characteristics (TA = 25° C unless otherwise noted)
SYMBOL PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
Input LED (See OP245 for additional information — for reference only)
VF Forward Voltage - - 1.7 V IF = 20 mA
IR Reverse Current - - 100 μA VR = 2.0 V
Output Phototransistor (See OP555 [OPB350] & OP750 [-062, -125, -187 & -250] for additional information— for Ref. Only)
V(BR)CEO Collector-Emitter OPB350
Breakdown Voltage -062, -187 & -250
30
24
-
-
-
- V IC = 100 μA, EE = 0 mw/cm2
ICEO Collector-Emitter Dark Current - - 100 nA VCE = 10 V, IF = 0, EE = 0 mw/cm2
VCE(SAT) Collector-Emitter Saturation Voltage - - 0.4 V IC = 100 μA, IF = 5 mA
IC(ON)
On-State Collector Current
OPB350L062 & OPB350W062Z
OPB350
OPB350L125 & OPB350W125Z
OPB350L187 & OPB350W187Z
OPB350L250 & OPB350W250Z
0.30
1.00
1.30
1.00
0.75
0.8
3.5
2.6
2.0
1.5
1.3
6.0
3.9
4.0
3.0
mA VCE = 0.4 V, IF = 5 mA
On/Off
Ratio
OPB350L062 & OPB350W062Z
OPB350
OPB350L125 & OPB350W125
OPB350L187 & OPB350W187
OPB350L250 & OPB350W250
-
-
-
-
-
3.0
3.0
2.5
2.3
2.3
-
-
-
-
-
-
VCE = 0.4 V, IF = 5 mA , I.D.=0.0312”(6)
VCE = 0.4 V, IF = 5 mA , I.D.=0.0625”(6)
VCE = 0.4 V, IF = 5 mA , I.D.=0.0870”(6)
VCE = 0.4 V, IF = 5 mA , I.D.=0.1250”(6)
Coupled
© TT electronics plc Issue I 04/2016 Page 4
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
OPB350
© TT electronics plc Issue I 04/2016 Page 5
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
1
2
4
3
Pin # LED Pin # Transistor
1 Anode 4 Emitter
2 Cathode 3 Collector
OPB350L187 and OPB350L250
OPB350W187Z and OPB350W250Z
INCHES
[ MILLIMETERS]
DIMENSIONS ARE IN:
Dot
Dot
Solder pad Information
© TT electronics plc Issue I 04/2016 Page 6
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
J1—Pin # 6
Pin # FuncƟon
1 Vcc
2 Logic Out A
3 Logic Out B
4 Calibrate
5 Analog Out
6 Ground
Color
Red
Orange
Blue
Green
White
Black
J-1 OCB100-MC24
ShorƟng Bar PosiƟon Load
Resistance
3 2 1
~27 KW
~9.6 KW
~2.5 KW
±0.02
OCB350
0.125”
© TT electronics plc Issue I 04/2016 Page 7
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
OCB-MC24
(not sold separately)
AWG = 26 Length = 24” [610mm]
© TT electronics plc Issue I 04/2016 Page 8
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
Calibration Circuit theory of operation:
The OCB350 series is designed to minimize the change of optical devices due to manufacturing variance. With the calibration
circuit, the design engineer can narrow the initial output state providing a device that will operate the same for years with the
same startup state thus enhancing the reliability and consistence of the system. Degradation of the LED or phototransistor is
compensated for each time the system is calibrated allowing the system to provide a known, consistent output level resulting
in years of consistent quality. The OCB350 series are designed to maintain the calibrated setting even if power is lost. This
allows faster startup without the need for calibration every time the device is initiated. The designer can initiate the
calibration procedure at any time by momentarily grounding J1-Pin-4 (green wire). This allows the device to be remotely
calibrated then mounted in the equipment.
The PCBoard has a set of shorting pins allowing the user to change the phototransistor load resistor. By arranging the
shorting bar to the appropriate location (see table), the load resistance can be changed from approximately 2.5K to 27 K W.
Increasing the load resistor increases the sensitivity of the device.
When the “Calibrate” pin (#4) is momentarily grounded, the system begins its calibration process and raises the current
through the LED, from 0 mA to 14 mA, until the phototransistor reaches the preset calibration point. A green calibration light
will blink during the initiation and will stop when the preset phototransistor output level is reached. At this time, the LED drive
current is locked and maintained until Reset/Clear pin is momentarily grounded. If for some reason, the LED drive current
reaches the maximum allowable value, a RED warning light will be turned on. During the calibration process, remote
monitoring of J1-Pin3 allows the designer to ensure the system is calibrated (this output should be at the preset calibrated
output level when the calibration procedure is completed). The phototransistor load resistor may need to be adjusted to allow
the system to calibrate properly.
After the calibration process is complete, the device is ready for acknowledgement of a change in the signal. The design
engineer can monitor either the Analog Output (J1-Pin 5) or Logical Output (J1-Pin 2 or J1-Pin 3).
The Logical output will change state once the preset optical light condition is reached. The “Logic Out B” switches when the
optical signal increases above approximately 2/3 of VCC while “Logic Out A” switches when the optical signal decreases below
approximately 1/3 of VCC.
As with all optical devices, the switching condition is consistent with the phototransistor receiving a preset light level. This
switching position and light level may vary dependent on several possible factors such as:
• Ambient light variation ((reduced or eliminated with periodic recalibration)
• LED and phototransistor pair degradation (eliminated with periodic recalibration)
• Contamination in front of either the LED or phototransistor (reduced or eliminated with periodic cleaning)
• System power variation (reduced or eliminated with periodic recalibration)
• Temperature changes (reduced or eliminated with periodic recalibration)
© TT electronics plc Issue I 04/2016 Page 9
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
Electrical Specifications
Symbol Parameter Min Max Units Conditions
ICC Supply Current - 35 mA Vcc = 5.0 Volts
VOL Low Level Output Voltage(1) - 1.2 V Vcc = 5.0 Volts, VOUT < 2.2 Volts
VOH High Level Output Voltage(1) 3.5 - V Vcc = 5.0 Volts, VOUT > 2.8 Volts
Electrical Characteristics OCB350 Series (TA = 25°C unless otherwise noted)
VCC Supply Voltage 4.75 5.25 V
Absolute Maximum Ratings OCB350 Series (TA=25°C unless otherwise noted)
Storage & Operating Temperature Range 0°C to +70°C
Lead Soldering Temperature [1/16 inch (1.6mm) from the case for 5 sec. with soldering iron] 260°C
Notes:
1. Pins 2 and 3 logic outputs only.
© TT electronics plc Issue I 04/2016 Page 10
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
Schematic for OCB100 PCBoard
GP2/AN2
GP4/AN3
GP5/T1CKI GP1/AN1
GP3/MCLR
GP0/AN0
V
Vss
DD
1
5
6
2
4
7
8
3
Green
D4 D1
Red
J1 - Pin 4
C4
0.1µf
0.1µf
C1
R3
R1
R2
J1 - Pin 5
R10
R9
C3
0.1µf
Optical Device
U2
U3
LM324
U1
LM324
U1
D2
Blue
R11
J1 - Pin 3
J1 - Pin 1
J1 - Pin 6
1
2
4
5
6
Vcc
Logic Out A
Analog Out
Calibrate
Ground
J1
D3
5.6 V
R16
R7
R6 R12
C2
0.1µf
R4
R5
Logic Out B3
J1 - Pin 2
U1
LM324
R14
Green
D5
Q1
R8 R15
J2
123
R17
J1 = JST connector S6B-ZR(LF)(SN)
R13
470
470
Calibrate/Reset-Clear
OCB100-MC24
(not sold separately)
Calibrate/Reset-Clear
A
B
© TT electronics plc Issue I 04/2016 Page 11
OPTEK Technology, Inc.
1645 Wallace Drive, Carrollton, TX 75006|Ph: +1 972 323 2200
www.optekinc.com | www.ttelectronics.com
General Note
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Tube Liquid Sensor
OPB350 / OCB350 Series
(Calibration Circuit Available)
Sensing and Control
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
-40-200 20406080100
V
SAT
(Volts)
Normalized @ I
F
= 5mA, I
CE
= 100uA
Temperature (°C)
Typical VSAT vs Temperature
0
50
100
150
200
250
300
12345678910
Rise & Fall Time (usec)
Fall
Rise
VR2 = 1.0
Rise & Fall Time vs Load Resistance
Load Resistance (,000 Ohms)
()
0.0
0.2
0.4
0.6
0.8
1.0
1.2
-40 -20 0 20 40 60 80 100
Relative I
C(ON)
Normalized @ T=20°C
Normalized IC(ON) vs Temperature
Temperature (°C)
Test Circuit (Rise & Fall Time)
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Optek:
OCB350L187Z OCB350L250Z OPB350L125 OCB350L062Z OCB350L125Z