OPB350/OCB350 Series Tube Liquid Sensor

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

Image of TT Electronics/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 k 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


Manufacturer Part NumberDescriptionSensing DistanceAvailable QuantityBuy Now
OPB350SENS OPTO SLOT 3.18MM TRANS THRU0.125" (3.18mm)561 - Immediate
OPB350L125TUBE LIQUID SENSOR .125" PCB MTOPB350517 - Immediate
OPB350L187SENS OPTO SLOT 4.78MM TRANS THRU0.188" (4.78mm)368 - Immediate
OPB350W250ZSENS OPTO SLOT 6.35MM TRANS C-MT0.250" (6.35mm)132 - Immediate
OPB350W062ZSENSR OPTO SLOT 1.6MM TRANS C-MT0.063" (1.6mm)1699 - Immediate
OPB350L062SENSR OPTO SLOT 1.6MM TRANS THRU0.063" (1.6mm)43 - Immediate
OPB350L250SENS OPTO SLOT 6.35MM TRANS THRU0.250" (6.35mm)57 - Immediate
OPB350W187ZSENS OPTO SLOT 4.78MM TRANS C-MT0.188" (4.78mm)94 - Immediate
OPB350C125ZSENSOR OPTO SLOT SWITCH0.125" (3.18mm)0
Manufacturer Part NumberDescriptionSensor TypeOutput TypeAvailable QuantityBuy Now
OCB350L250ZBOARD CALIBR CIRCUIT OPB350L250Tube Liquid SensorAnalog34 - Immediate
OCB350L187ZBOARD CALIBR CIRCUIT OPB350L187Tube Liquid SensorAnalog26 - Immediate
OCB350L125ZBOARD CALIBR CIRCUIT OPB350L125Tube Liquid SensorAnalog0
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Published: 2011-04-11