OPB350/OCB350 Series Tube Liquid Sensor

Easy-to-use tube liquid sensors from TT Electronics/Optek

Optek Technology's OPB350 Series Tube Liquid SensorTT Electronics/Optek Technology's OPB350/OCB350 series is configured to optimize the design effort needed to use a fluid sensor with the addition of self-calibration circuitry. The OPB350/OCB350 series is 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 (~2.5 k, ~9.6 k, or ~27 Ω). A Reset/Clear pin is provided for remote signaling to calibrate the system.

Features   Applications
  • Can identify if liquid is present in clear tubes that have an outside diameter of 1/16" (1.6 mm), 1/8" (3.2 mm), 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
  • Non-contact fluid sensing
  • IV fluid
  • Oils and other petroleum products
  • Colored fluids
  • Toner fluids
  • Water


ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
OPB350 datasheet linkSENS OPTO SLOT 3.18MM TRANS THRUOPB350SENS OPTO SLOT 3.18MM TRANS THRU1434 - Immediate
OPB350 product page link
OPB350L250 datasheet linkSENS OPTO SLOT 6.35MM TRANS THRUOPB350L250SENS OPTO SLOT 6.35MM TRANS THRU1568 - Immediate
OPB350L250 product page link
OPB350L125 datasheet linkTUBE LIQUID SENSOR .125" PCB MTOPB350L125TUBE LIQUID SENSOR .125" PCB MT1068 - Immediate
OPB350L125 product page link
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ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
OCB350L250Z datasheet linkBOARD CALIBR CIRCUIT OPB350L250OCB350L250ZBOARD CALIBR CIRCUIT OPB350L250134 - Immediate
OCB350L250Z product page link
OCB350L125Z datasheet linkBOARD CALIBR CIRCUIT OPB350L125OCB350L125ZBOARD CALIBR CIRCUIT OPB350L125208 - Immediate
OCB350L125Z product page link
OCB350L187Z datasheet linkBOARD CALIBR CIRCUIT OPB350L187OCB350L187ZBOARD CALIBR CIRCUIT OPB350L1870OCB350L187Z product page link
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Published: 2011-04-11