optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue c.1 03/09 page 1 of 8 tube liquid sensor opb350 / ocb350 series (calibration circuit available) 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 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 t he maximum current, while dark liquid present causes it to sink the minimum current. as bubbles pass through the t ube, the signal will vary between the ?liquid present? and ?no liquid? states. if no tube is present, the phototrans istor sinks current between t he 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 rese t/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 cha llenge, contact your optek representative. product photo here ?t? package rohs applications: ? non-contact fluid sensing ? iv fluid ? oils and other petroleum products ? colored fluids ? toner fluids ? water ?n? package ?c? package
optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue c.1 03/09 page 2 of 8 tube liquid sensor opb350 / ocb350 series (calibration circuit available) optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. notes: (1) all parameters tested using pulse technique. (2) rma flux is recommended. duration can be exten ded to 10 seconds maximum when flow soldering. (3) methanol or isopropanol are recommended as cleaning agents. t he plastic housing is soluble in chlorinated hydrocarbons and key- tones. (4) derate linearly 1.33 mw/ c above 25 c. (5) e e(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 rati o is calculated by the i c(on) when the tube is filled with water divided by the i c(on) with an empty tube. 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-mc24 cable ocb350l125z opb350l125 mounted on ocb100az calibration circuit board, with ocb-mc24 cable ocb350l187z opb350l187 mounted on ocb100az calibration circuit board, with ocb-mc24 cable ocb350l250z opb350l250 mounted on ocb100az calibration circuit board, with ocb-mc24 cable complete part numbers of opb350 and ocb350 series
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue c.1 03/09 page 3 of 8 tube liquid sensor opb350 / ocb350 series (calibration circuit available) absolute maximum ratings (t a =25c 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) fr om the case for 5 sec. with soldering iron] (2) 260 c led forward dc current 50 ma peak forward current (2 s pulse width, 0.1% duty cycle) 1 a reverse dc voltage 2 v power dissipation 100 mw output phototransistor collector-emitter voltage 24 or 30 v collector dc current 50 ma power dissipation 100 mw electrical characteristics (t a = 25 c unless otherwise noted) symbol parameter min typ max units test conditions input led (see opb245 for additional information ? for reference only) v f forward voltage - - 1.7 v i f = 20 ma i r reverse current - - 100 a v r = 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 i c = 100 a, e e = 0 mw/cm 2 i ceo collector-emitter dark current - - 100 na v ce = 10 v, i f = 0, e e = 0 mw/cm 2 coupled v ce(sat) collector-emitter saturati on voltage - - 0.4 v i c = 100 a, i f = 5 ma i c(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 v ce = 0.4 v, i f = 5 ma on/off ratio opb350l062 & opb350w062z opb350 opb350l125 & opb350w125 opb350l187 & opb350w187 opb350l250 & opb350w250 - - - - - 3.0 3.0 2.5 2.3 2.3 - - - - - - v ce = 0.4 v, i f = 5 ma , i.d.=0.0312? (6) v ce = 0.4 v, i f = 5 ma , i.d.=0.0625? (6) v ce = 0.4 v, i f = 5 ma , i.d.=0.0870? (6) v ce = 0.4 v, i f = 5 ma , i.d.=0.1250? (6)
optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue c.1 03/09 page 4 of 8 tube liquid sensor opb350 / ocb350 series (calibration circuit available) optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. 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 opb350l062 & opb350w062z opb350l125 & opb350w125z dot opb350 solder pad information 4x o .020 [0.51] 4x .125 min. 0.313 [7.94] 0.110 [2.79] ?0.125 [?3.17] 0.474 [12.04] ?0.063 [?1.59] 0.056 [1.42] 0.150 [3.81] 2x ?0.125 [?3.18] 1.165 [29.59] 0.895 [22.73] 0.448 [11.37] 0.020 [0.51] 0.625 [15.88] 60 0.100 [2.54] 0.110 [2.79] 4x 24.00" min 0.525 [13.34] 0.300 [7.62] cathode anode collector emitter emitter collector anode cathode 0.300 [7.62] 0.625 [15.88] 0.100 [2.55] white dot to identify led anode lead
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue c.1 03/09 page 5 of 8 tube liquid sensor opb350 / ocb350 series (calibration circuit available) j1?pin # 1 pin # function 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 shorting bar position load resistance 3 2 1 ~27 k ~9.6 k ~2.5 k ocb-mc24 awg = 28 length = 24? [610mm] 0.02 ocb350
optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue c.1 03/09 page 6 of 8 tube liquid sensor opb350 / ocb350 series (calibration circuit available) optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. calibration circuit theory of operation: the ocb350 series is designed to minimi ze the change of optical devices due to ma nufacturing 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 t he 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 th e 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 calibr ation 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 . 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 phototransisto r 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 ?l ogic out a? switches when the optical signal increases ab ove approximately 2/3 of v cc while ?logic out b? switches when the optical signal decreases below approximately 1/3 of v cc . as with all optical devices, the switching condition is consistent with the phototransistor receivi ng a preset light level. th is 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 phototrans istor (reduced or eliminated with periodic cleaning) ? system power variation (reduced or el iminated with periodic recalibration) ? temperature changes (reduced or elim inated with periodic recalibration)
optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue c.1 03/09 page 7 of 8 tube liquid sensor opb350 / ocb350 series (calibration circuit available) schematic for ocb100 pcboard ocb100-mc24 symbol parameter min max units conditions i cc supply current - 35 ma vcc = 5.0 volts v ol low level output voltage (1) - 1.2 v vcc = 5.0 volts, v out < 2.2 volts v oh high level output voltage (1) 3.5 - v vcc = 5.0 volts, v out > 2.8 volts electrical characteristics ocb350 series (t a = 25c unless otherwise noted) v cc supply voltage 4.75 5.25 v absolute maximum ratings ocb350 series (t a =25c unless otherwise noted) storage & operating temperature range 0c to +70c lead soldering temperatur e [1/16 inch (1.6mm) from the case for 5 sec. with soldering iron] 260c notes: 1. pins 2 and 3 logic outputs only.
optek technology inc. ? 1645 wallace drive, carrollton, texas 75006 phone: (972) 323-2200 or (800) 341-4747 fax: (972) 3 23-2396 sensors@optekinc .com www. optekinc.com issue c.1 03/09 page 8 of 8 tube liquid sensor opb350 / ocb350 series (calibration circuit available) optek reserves the right to make changes at any time in or der to improve design and to s upply the best product possible. () 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=20c normalized i c(on) vs temperature temperature (c) 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 -40 -20 0 20 40 60 80 100 v sat (volts) normalized @ i f = 5ma, i ce = 100ua temperature (c) typical v sat vs temperature 0 50 100 150 200 250 300 12345678910 rise & fall time (usec) fall rise v r2 = 1.0 rise & fall time vs load resistance load resistance (,000 ohms) test circuit (rise & fall time)
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